Synthex Forge — x402 Paid Agent Services

Ebook Download VALUE: The full 121-page book 'x402 — The Agent Economy' — the definitive account of building machine-native services agents pay for, in one file. PRICE: $29.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Takes no parameters.

Signed reference rates, always as-of stamped. FX leg is the ECB euro reference rates (official, daily); crypto leg is the Binance public spot bookTicker. On a weekend or holiday the LAST BUSINESS DAY is returned with is_stale=true and the real staleness in seconds — a stale rate is never presented as live. VALUE: What is this amount worth right now? PRICE: $0.01 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed Research VALUE: Paid route: $0.50 USDC on eip155:8453 (USD). An unauthenticated request is answered HTTP 402 with a machine-readable price challenge in the `Payment-Required` response header and a JSON body carrying `error`, `error_reason`, `error_message` and `x402Version`. Error codes and their remedies are published at https://x402.synthexforge.com/v1/errors. PRICE: $0.50 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Multi-channel social-signal search (PAID $0.02) VALUE: Paid route: $0.02 USDC on eip155:8453 (USD). An unauthenticated request is answered HTTP 402 with a machine-readable price challenge in the `Payment-Required` response header and a JSON body carrying `error`, `error_reason`, `error_message` and `x402Version`. Error codes and their remedies are published at https://x402.synthexforge.com/v1/errors. PRICE: $0.02 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Turn a deal between two agents into signed, machine-checkable release terms (PAID $0.50) VALUE: Produce the release-terms document for a deal. PRICE: $0.50 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

What does agent A owe agent B, and is the evidence sufficient to settle it? (PAID $0.25) VALUE: Adjudicate what one agent owes another. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Compute a signed agent-reputation composite from an agent id and its event list. VALUE: Reputation scored from dated, signed behaviour events rather than self-reported claims — so you can price trust before you trade. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Compute a signed trusted-route ranking for a counterparty. VALUE: The specific routes an agent is cleared to call, with the evidence behind each clearance — so you can enforce a least-privilege allowlist instead of trusting a name. PRICE: $0.30 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Hand a task from one agent to another without losing the thread (PAID $0.10) VALUE: Assess a handoff of task state between two agents. PRICE: $0.10 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Attested Agent Execution — bounded agent run (PAID $1.00) VALUE: One audited agent execution with a cost ledger and a signed result, so the work is reproducible and the spend is attributable. PRICE: $1.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed self-contained audit evidence package with a Merkle root (PAID $4.00) VALUE: A single signed package binding artifacts, assertions and attestations for a period — what an auditor asks for, without three weeks of chasing. PRICE: $4.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

MiFID-style best-execution attestation. Returns within_tolerance | outside_tolerance | insufficient_evidence, with the implementation shortfall, the slippage, the gap to every benchmark supplied, the timing risk and a quality grade. Every bps figure is reproducible from the numbers shown. A missing arrival price returns insufficient_evidence — implementation shortfall is undefined without a decision price. VALUE: A MiFID-style best-execution attestation — proof that an order was executed in line with the mandate. Returns the implementation shortfall, the slippage, the gap to every benchmark supplied and a quality grade, with the arithmetic written out so a reviewer can re-derive every figure. No arrival price means no verdict. PRICE: $2.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Budget Preflight VALUE: Whether this call fits the budget, BEFORE you spend — turns a surprise overage into a decision you can make in advance. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

x402 Bureau — full conformance audit of any endpoint (PAID $0.25) VALUE: A full conformance audit of any target endpoint against the x402 standard, every clause, signed and dated — the check a buyer cannot do from the outside. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

x402 Bureau — conformance-check any issuer's receipt/offer (PAID $0.05) VALUE: Independent verification that a receipt is genuine and matches the offer it claims to settle — counterparty-side proof, not your own. PRICE: $0.05 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

x402 Bureau — reputation from signed observation history (PAID $0.10) VALUE: The Verification Bureau's standing reputation read for a subject, from its own corpus — third-party standing you cannot manufacture. PRICE: $0.10 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Compliance Check VALUE: A specific, dated compliance verdict for one described processing activity — the artifact a regulator asks for, not a policy PDF. PRICE: $1.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Containment Register VALUE: A registered, signed containment policy with named emergency contacts — so 'what happens if this agent goes wrong' has an answer that is already signed and enforceable. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed rule-based extraction of the clauses that decide money and liability (PAID $1.50) VALUE: The obligations in a contract as structured, dated data — so compliance is a query, not a re-read of forty pages. PRICE: $1.50 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Dated, signed proof that a document set existed — a Merkle root, the leaves, and a real inclusion proof (PAID $2.00) VALUE: Anchor a document set. PRICE: $2.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Counterparty credit & conduct score from your own observations (PAID $0.50) VALUE: Price the risk of paying an unknown agent, endpoint or host from YOUR OWN observations — a 0-1000 credit and conduct score with the weighted factors behind it, so you price trust before you pay. PRICE: $0.50 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Issue a scoped, expiring, offline-verifiable capability credential (PAID $0.05) VALUE: A scoped, time-limited, signed credential — delegation with an expiry, so access does not have to be revoked by hand. PRICE: $0.05 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

C2Pa Verify VALUE: Whether a media file carries a valid C2PA provenance manifest — the check that separates authentic media from generated media. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Assess whether data is still fresh, undated or conflicting (PAID $0.02) VALUE: Whether a claim's source is still fresh enough for the decision you are about to make — staleness is the failure mode nobody prices in. PRICE: $0.02 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed Snapshot VALUE: A tamper-evident snapshot of a series with its sources and fetch time — a data point you can defend later, not just cite. PRICE: $0.30 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Validate, normalise and mechanically repair a payload against a declared JSON-Schema subset. Repair never fabricates data: a required property with no default is reported missing, not inserted. Keywords outside the supported subset are reported in schema_keys_unsupported rather than silently ignored. VALUE: Coercion and repair of a payload against a schema, with the repairs itemised — malformed input becomes clean input, and every change is on the record. PRICE: $0.02 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed decision attestation with an assurance level and explicit unknowns (PAID $2.50) VALUE: A signed, dated, replayable attestation of a decision and the policy that produced it — the difference between a decision and an accountable one. PRICE: $2.50 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Proof that a digital deliverable arrived and matched what was promised (PAID $0.10) VALUE: A paid service on the x402 rail — the result is worth the call because the same work done by hand costs more time than the price. PRICE: $0.10 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed advisory dispute ruling from a deterministic rubric (PAID $2.00) VALUE: A binding ruling on a dispute from the contract, evidence and policy — so the resolution is a signed artifact, not an argument. PRICE: $2.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Prior-test registry query: what has actually been tested on an instrument/timeframe/strategy-type before, and what the prior evidence says. Every field is optional but at least one must be supplied. VALUE: What has actually been tested on this instrument, timeframe and strategy type before, and what the prior evidence says — so you do not pay to rediscover a known result. PRICE: $0.05 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Is that track record real, or did you find it by looking? (PAID $3.00) VALUE: Whether a claimed edge survives replication on your own returns — the test that separates a real edge from a curve fit. PRICE: $3.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Seal one signed-attribution / forensics evidence record into a tamper-evident vault entry. VALUE: Sealing one evidence record into a tamper-evident vault entry — chain of custody that survives after the fact. PRICE: $0.20 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Bind sealed forensics-vault entries into ONE signed query receipt. VALUE: Querying that vault by actor or predicate — the retrieval side of evidence you cannot quietly edit. PRICE: $0.15 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Assess and attest a financial statement or metrics payload into signed, reproducible evidence. VALUE: Signed, dated financial evidence extracted from a statement — the figure a lender, investor or auditor can rely on without a call. PRICE: $0.35 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Exact-decimal financial calculation with its published convention (PAID $0.01) VALUE: Exact decimal arithmetic under stated conventions — financial totals that do not drift by a cent when you scale them. PRICE: $0.01 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

The institutional tearsheet, reproducible: every ratio re-derivable from the returns series and the published formula version (PAID $5.00) VALUE: Compute the tearsheet. PRICE: $5.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Agent Spend Governor — ATOMIC reserved lease (PAID $0.02) VALUE: A leased, expiring reservation of budget for a named intent — spend that is committed before it is spent. PRICE: $0.02 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Agent Spend Governor — settle a lease, idempotent (PAID $0.02) VALUE: Closing a reservation against what was actually spent — the difference between a budget and a wish. PRICE: $0.02 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Bind an agent to its operator and wallet, with the evidence and an honest grade of it (PAID $1.00) VALUE: Bind an agent to its operator and its wallet. PRICE: $1.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Identity Control Proof VALUE: Proof that a claimer controls an identifier, signed and dated — so an identity claim is a verification, not an assertion. PRICE: $0.20 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

The signed Synthex Agentic-Commerce Index: a dated, rule-published mark (PAID $5.00) VALUE: The Synthex Agentic-Commerce Index — a dated, signed mark on the agentic economy itself, computed from our own observation corpus of x402 settlements. The rules are published with the answer, so you can re-derive the marks. PRICE: $5.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Invoice Ocr VALUE: Structured line items, vendor and total from an invoice image — the manual data entry an agent removes. PRICE: $0.02 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Latency benchmark of a third-party API, measured by us (PAID $0.05) VALUE: The latency percentiles of a vendor's API from our own probes — the number a performance-based selection is actually made on. PRICE: $0.05 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Licence Check VALUE: Whether a specific dataset licence permits a specific intended use in a specific jurisdiction — a legal question with a dated answer. PRICE: $0.10 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed compliance certificate: does this portfolio comply with this mandate (PAID $5.00) VALUE: A signed, dated compliance certificate an allocator can actually file — replaces an analyst hour on a document, and never certifies compliance on missing evidence. PRICE: $5.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed market-hours / holiday / settlement answer (PAID $0.01) VALUE: Session hours, holidays and settlement cut-offs for a venue, DST aware — so you never settle into a closed market. PRICE: $0.01 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed bar series over an explicit range (PAID $1.00) VALUE: Historical bars for an instrument, formatted and bounded — the data a backtest needs, without hand-assembling it. PRICE: $1.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed bulk bar series, up to 20 pairs (PAID $5.00) VALUE: The same history for many pairs in one call — the cost of a portfolio-wide study drops to a single request. PRICE: $5.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Is this market trending or ranging? Signed regime read from your own series (PAID $0.05) VALUE: Return ONE signed, dated regime read. PRICE: $0.05 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed OHLCV snapshot from our own market-data store (PAID $0.01) VALUE: A point-in-time market snapshot for an instrument, bounded and timestamped — the 'now' you stamp a decision with. PRICE: $0.01 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Judge Grade VALUE: A rubric-scored judgement of a model response, signed and dated — evaluation you can re-check rather than re-argue. PRICE: $0.15 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Tool Permission Threatmodel VALUE: A threat model of a tool manifest with per-tool permissions and runaway protection — the analysis before you grant an agent a capability. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Uptime Canary Probe VALUE: Independent uptime confirmation tied to a settled receipt — proof of service that a self-report cannot manufacture. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Return the latest signed, reproducible sealed state for a key. VALUE: Reading that durable memory back — continuity for an agent that must not forget. PRICE: $0.05 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Persist a budget-capped state version into a signed, reproducible memory vault. VALUE: A durable, owned memory entry — a fact that survives the session and belongs to someone you can name. PRICE: $0.10 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed NAV attestation for agent treasuries: what is this book worth, as of when, computed how (PAID $10.00) VALUE: A signed NAV attestation for agent treasuries — the single document every allocator, auditor and counterparty asks for: what is this book actually worth, as of when, computed how. PRICE: $10.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Output Verify VALUE: Whether an output actually satisfies its schema, claims and staleness budget — a check the model cannot run on itself. PRICE: $0.50 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Pass Purchase VALUE: Prepaid capacity at a lower effective per-call price — the difference between renting and owning the cost. PRICE: $25.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Buy a trial prepaid capacity pass — $0.50 for 20 calls, 7 days (PAID $0.50) VALUE: The trial tier of the same prepaid capacity — proof of the unit economics before you commit to the full pass. PRICE: $0.50 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Takes no parameters.

Will this payment settle inside my deadline? (PAID $0.05) VALUE: Whether a payment will still settle inside your deadline, judged on the settlement times we have measured for that rail — the check that stops a slow rail from blowing a deadline. PRICE: $0.05 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Validate a captured x402 402 payment envelope (PAID $0.25) VALUE: Whether a signed payment envelope is well-formed, unexpired and for the right resource — catch a bad payment before it settles. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Deterministic policy evaluation: is this action allowed under this policy given this caller state? Returns a signed allow/deny verdict with the specific rule that fired. Safe-deny on malformed input. VALUE: Whether one action is permitted for one caller under one policy, as of one instant — enforcement you can ask a question of. PRICE: $0.10 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed exposure report under the caller's own risk model (PAID $3.00) VALUE: Risk for a set of positions under a named model, dated — the number that decides whether a portfolio is sized right. PRICE: $3.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed preflight verdict on a counterparty BEFORE you pay them. Returns a three-state verdict (go | caution | avoid | unknown) with dated, signed evidence. Fewer than 3 independent observations in 30 days returns `unknown` with the coverage gap named — never a guessed `go`. VALUE: The agent's first call: a signed three-state verdict on a counterparty before you pay them, with the coverage gap named when there isn't enough evidence. PRICE: $0.01 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Pre-trade risk gate: approve / reduce / reject an order against your own declared limits (PAID $0.25) VALUE: The order gate: approve, reduce or reject an order against the risk limits you declared — and a `reduce` hands back a size that actually passes, so one bad order never reaches the market. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Reconcile three ledgers — what was ordered, what was delivered, what was paid — with every variance naming its direction (PAID $0.50) VALUE: Reconcile the three ledgers. PRICE: $0.50 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed provenance for a piece of content, so a buyer can see where it came from (PAID $0.10) VALUE: Produce a signed provenance overlay for a piece of content. PRICE: $0.10 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

What does the equity curve look like? Seeded distribution of terminal outcomes (PAID $0.15) VALUE: Return ONE signed, dated Monte Carlo distribution. PRICE: $0.15 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Are these two strategies the same bet? Signed correlation matrix and clusters (PAID $0.10) VALUE: Return ONE signed, dated overlap matrix. PRICE: $0.10 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Can this sizing scheme bankrupt me? First-passage ruin probability with Kelly (PAID $0.05) VALUE: Return ONE signed, dated risk-of-ruin answer. PRICE: $0.05 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Is this return stream distinguishable from noise? Seeded sign-flip permutation test (PAID $0.05) VALUE: Return ONE signed, dated significance test. PRICE: $0.05 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed quota reservation decision (PAID $0.01) VALUE: Whether a call fits a remaining quota, before you spend it — the check that stops a quota from being discovered by exhaustion. PRICE: $0.01 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Readiness Attest VALUE: A signed readiness attestation with the evidence and policy snapshot behind it — readiness you can evidence, not assert. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Mint a signed typed receipt for any transaction or action. VALUE: A signed receipt for an action, mintable as evidence of what happened — a portable 'it did that'. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Generate a tamper-evident, signed research brief on a requested topic. VALUE: A researched brief on a topic with its sources and depth stated, attested — research with a provenance you can point at. PRICE: $2.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

An ADVISORY execution plan for moving money — it never moves money: no keys, no signing, no broadcast (PAID $0.05) VALUE: Plan the route. Advisory only. PRICE: $0.05 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Sec Extract VALUE: Structured data extracted from a company's SEC filings — primary filings, not a data vendor's interpretation of them. PRICE: $0.05 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Dependency Risk VALUE: Risk analysis of a dependency set for a given ecosystem — supply chain exposure enumerated rather than assumed. PRICE: $0.20 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Redteam Authorized Scan VALUE: An authorized adversarial scan of a target you have evidence of permission to test — the finding, with the authorization on the record. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Threatmodel Analyze VALUE: A threat model of a tool manifest in its deployment context — attack surface before it is exploited. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed conditional-release verdict — are the release conditions met? (PAID $0.25) VALUE: A settlement that releases only if its named conditions hold — escrow logic as a single call. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed settlement-receipt verdict for a tx hash (PAID $0.01) VALUE: Independent confirmation that a transaction settled to the right payee for the right amount — proof of payment from the ledger, not from the payer. PRICE: $0.01 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Which rail should this settlement use? Fee, speed and the constraint that excluded every other rail (PAID $0.50) VALUE: Advise on the settlement route. PRICE: $0.50 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Evidence package for a vendor SLA breach (PAID $1.00) VALUE: The evidence package when a vendor misses its stated SLA: measured against claimed, with the shortfall itemised — what a dispute needs and nobody has. PRICE: $1.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Screen an SME sale against the house LBO structure and rules (PAID $2.50) VALUE: A structured screen of an SME on turnover, EBITDA, structure and sector — the first pass over an acquisition candidate. PRICE: $2.50 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Is this agent's spending behaving normally? A named z-score test and the counterparty that drove it (PAID $0.05) VALUE: Judge whether the spend is normal. PRICE: $0.05 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed attestation of an agent's spend (PAID $0.50) VALUE: A signed, dated attestation of what an agent spent, for its principal — the artefact that makes an agent's spend reviewable instead of self-reported. PRICE: $0.50 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

How much money can this strategy actually carry? Returns capacity_computed | insufficient_input | no_capacity, with the capacity, a band, the binding constraint, the alpha after costs and a degradation curve. Capacity DECREASES as the assumed Sharpe falls. A missing adv_usd returns insufficient_input naming the field — the engine never guesses a liquidity figure. VALUE: How much money can this strategy actually carry? The answer every allocator asks and almost nobody can give, because the cost-to-alpha term needs a graded-strategy population to calibrate — and we hold one. Returns the capacity, the binding constraint, the alpha after costs and the degradation curve. The impact model is stated with its provenance and every parameter is overridable. PRICE: $10.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Is this edge deployable? Deflated Sharpe with a calibrated multiple-testing threshold (PAID $2.00) VALUE: Return ONE signed, dated strategy verdict. PRICE: $2.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Fold research + quant + audit inputs into ONE signed verdict. VALUE: A signed verdict fusing audit, quant and research inputs on one subject — the answer, with the inputs that produced it. PRICE: $0.50 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Did the work meet the spec, criterion by criterion? Per-criterion pass / fail / undetermined, with an absent observation never counted as a pass (PAID $0.25) VALUE: Grade the observations against the spec. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Signed uptime of a third-party API, measured by us (PAID $0.10) VALUE: The uptime of a vendor's API, measured by us and signed, so you are not trusting their own status page when you make a procurement call. PRICE: $0.10 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Utils Code Review Brief VALUE: A structured review brief for a code block — the issues worth reading, separated from the noise. PRICE: $0.15 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Utils Doc Convert VALUE: Converting a document between formats with a signed output — turning a file into something a machine can read. PRICE: $0.10 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Utils Invoice Extract VALUE: Structured line items from invoice text — the manual data entry an agent removes, without the image. PRICE: $0.10 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Utils Pii Redact VALUE: Redacting names and other identifiers from text, in place — compliance with a diff you can inspect. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Utils Schema Cleanup VALUE: Cleaning a CSV or JSON payload against a schema — the messiness removed before it reaches your model. PRICE: $0.05 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Utils Translate Doc VALUE: Translating a document with its structure preserved — a document an agent in another language can actually use. PRICE: $0.10 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Dated signed verdict on a counterparty wallet (PAID $0.02) VALUE: Is this wallet safe to transact with right now? PRICE: $0.02 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Judge a whole portfolio in one call. Batch verdict with significance, risk and overlap (PAID $5.00) VALUE: Return ONE signed, dated batch verdict. PRICE: $5.00 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Dated signed verdict on an endpoint (PAID $0.02) VALUE: Will this URL pay me if I call it? PRICE: $0.02 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Dated signed verdict on a listed service (PAID $0.02) VALUE: Is this listed service alive, honest and fairly priced? PRICE: $0.02 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Dated signed verdict on an MCP tool (PAID $0.02) VALUE: Is this MCP tool safe to grant? PRICE: $0.02 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Register a service into the network-effect verify catalog and grow the trust index. VALUE: Registering a service in the verification catalogue with its signature — the entry that lets others verify it too. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Create a signed, tamper-evident track-record attestation (Ed25519 + SHA-256) over any claim. VALUE: A signed, dated attestation of a claim with a claim type — a standalone 'this is true, and here is when'. PRICE: $0.25 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Dated proof of what existed at time T (PAID $0.01) VALUE: A dated economic anchor point for the x402 economy — the yardstick for whether activity is actually growing. PRICE: $0.01 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

The queryable index of the agent economy: what is offered, what it costs, and whether it still works. An endpoint is never invented — every result exists in the corpus with a `last_seen`. VALUE: The live index of paid x402 services, filterable by price, network and conformance — where new services are found. PRICE: $0.02 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Cost + landing quote for a target call (PAID $0.01) VALUE: What a call will actually cost and whether it will land, priced from the 402 envelopes we have observed ourselves — so an agent prices a vendor before it commits instead of after. PRICE: $0.01 USDC per call. HOW TO PAY: USDC on eip155:8453, exact scheme, to 0xc8fF67FAE72596478599EAAcfad8656fAe1113c8. Sign an EIP-3009 transferWithAuthorization for the exact amount and put it in the `X-PAYMENT` header, then retry the same call. An unpaid call returns a `payment_required` payload with the amount, asset, network and payTo already filled in. The `synthex-x402` SDK (PyPI and npm) does the 402 -> sign -> retry loop in one call.

Liveness and settlement-configuration probe for the x402 service. Returns the live network, receive address and whether settlement is enabled. VALUE: Free, because an agent that cannot tell a live service from a dead one pays for nothing useful. PRICE: FREE — no payment required. Call it directly. No payment, no headers, no account.

Takes no parameters.

Verify a signed receipt you already hold — FREE, no payment, no network call to us. Recomputes the canonical JSON digest and checks the Ed25519 signature against the published public key, so you can confirm a receipt's authenticity before you act on it. VALUE: Free, because verifying a receipt you already paid for must never cost a second payment. PRICE: FREE — no payment required. Call it directly. No payment, no headers, no account.