Tech Risk

ai.greyridgesignalsPublished by greyridgesignals.aiOfficial publisherv0.1.7Updated Nov 4, 2026

MCP security scanner: tool-poisoning & prompt-injection audit (OWASP LLM01/LLM08), x402-payable

VerifiedStreamable HTTPWeb executableFinanceDeveloper ToolsSecurity & Monitoring

Overview

AI-generated overview

Pay-per-call x402 data and security API for AI agents: MCP tool-poisoning scans, x402 payment preflight and receipt checks, Base on-chain reads, and…

What you can do
  • Scan MCP servers for tool-poisoning and prompt-injection, with a free counts-only preview and a paid itemized audit
  • Check x402 endpoints before paying and verify USDC settlement receipts afterwards on Base
  • Screen Base wallets against OFAC and scam lists, and read balances, gas, blocks and transactions
  • Assess Base ERC-20 tokens and swaps with honeypot, rug-risk and GO/HOLD/BLOCK pre-trade verdicts
  • Fetch crypto spot prices, cross-venue funding rates, DeFi yields and Polymarket markets
  • Enrich domains with tech-stack fingerprinting, CVE/EPSS/KEV risk and subdomain enumeration
When to use it
Useful when an agent pays x402 endpoints and needs pre-payment and settlement checks, when you want to audit an MCP server's tools for hidden instructions, or when an agent trades or screens tokens and wallets on Base. Most routes have a free preview, so it is easy to evaluate before paying.
Requirements
Remote streamable-HTTP endpoint, or a local stdio process via uvx from the greyridge-x402-tools PyPI package (or the npm client). No account or API key. Paid tools require inline USDC micropayments on Base mainnet through an x402-capable client; free preview tools need no payment. Network access to the hosted API.
Before you install
Paid tools spend real USDC per call (roughly $0.001 to $0.05), so an agent needs a funded wallet and a spending limit. The optional local client can auto-settle payments when a wallet private key is set in X402_WALLET_PRIVATE_KEY; leave it empty to use only free tools. Scans and enrichment send the target URL or domain to a third-party service, and verdicts are readiness signals, not guarantees of safety.

Installation

In SourceWeft

  1. Open Tech Risk in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/ai.greyridgesignals%2Ftech-risk/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "tech-risk": {
      "type": "http",
      "url": "https://api.greyridgesignals.ai/mcp"
    }
  }
}

README

Grey Ridge Signals — Agent-Native x402 Data & Security APIs

Pay-per-call crypto, DeFi, prediction-market, and on-chain data for AI agents — plus MCP security scanning — over the x402 payment protocol on Base mainnet.

No account, no API key, no subscription. An agent pays inline in USDC (from $0.001/call) and gets the data back in the same request. Every data endpoint has a free preview so an agent can taste the payload before paying.

  • Base URL: https://x402-data-api.sigrunner.workers.dev
  • MCP endpoint (streamable-http): https://x402-data-api.sigrunner.workers.dev/mcp
  • Canonical domain: https://x402-data-api.sigrunner.workers.dev (same API)
  • Discovery: /.well-known/x402 · /openapi.json · /llms.txt
  • Network: Base mainnet (eip155:8453), USDC. Settles via the non-custodial xpay facilitator — no Coinbase/CDP account needed. Also listed on the CDP x402 Bazaar.

Two flagships — what agents actually pay for

  1. MCP server security scan (/scan/mcp, $0.05) — a prompt-injection / tool-poisoning audit of an MCP server's tools (OWASP LLM01/LLM08). Zero-egress: for private/OAuth-gated servers you POST only the tools/list JSON — nothing else leaves your side. There is no free equivalent for this (unlike token-safety, where free multi-chain scanners exist). Free preview: POST /scan/mcp/preview. CI gate (on the GitHub Marketplace): uses: rezearcher/[email protected].
  2. Pre-trade decision gate (/gate/swap, $0.008 · /chain/token-report, $0.01) — a decision (GO/HOLD/BLOCK, SAFE/CAUTION/AVOID) sized to your trade, not raw flags your agent has to interpret. Base-native; if you trade other chains, keep your multi-chain scanner and use this on Base.

Everything below is the full catalog (crypto/DeFi data, on-chain reads, LLM, enrichment). Measured reliability at /status (not an SLA).

Endpoints

Crypto & DeFi data

EndpointPriceReturns
GET /crypto/prices?coins=bitcoin,ethereum,solana$0.001Spot token prices (DefiLlama), keyless. Up to 25 CoinGecko ids.
GET /crypto/funding?limit=20$0.001Cross-venue perp funding rates (Hyperliquid + OKX, graceful fallback) with the funding spread + best long/short venue — the arb signal, not just a single-venue list.
GET /defi/yields?limit=20&project=&chain=&stable=$0.001Top DeFi lending/LP yields (DefiLlama) with APY breakdown, 7d/30d APY trend, IL risk, and DefiLlama's stability forecast — decision-grade, not a raw list.
GET /pm/markets?query=&limit=20$0.005Live Polymarket prediction markets: question, outcomes, prices, volume, liquidity, end date.

Base on-chain (JSON-RPC read primitives)

Base-native, multi-provider RPC with automatic failover (never fails a paid call on one provider's rate limit).

EndpointPriceReturns
GET /chain/block-number$0.001Current Base block number
GET /chain/gas-price$0.001Current gas price (wei + gwei)
GET /chain/balance?address=$0.001Native ETH balance
GET /chain/token-balance?address=&token=$0.001ERC-20 token balance
GET /chain/tx?hash=$0.001Transaction details
GET /chain/receipt?hash=$0.001Transaction receipt (status, gas used, logs)
GET /chain/code?address=$0.001Contract-code check — is it a contract, and EIP-7702 delegated-EOA detection (is_eip7702_delegate / delegate_address)
GET /chain/wallet?address=$0.003Bundle: ETH balance + tx count + contract flag in one call, EIP-7702 delegated-EOA aware (is_eip7702_delegate / delegate_address)

Agent trading gates (new)

EndpointPriceReturns
GET /gate/swap?token=0x…&side=buy|sell&notional_usd=N$0.008Pre-trade go/hold/block decision for any Base ERC-20: safety verdict, risk score, pool liquidity and price-impact of your size, flags. One call before an agent swaps. Free live sample: /gate/swap/preview
GET /chain/token-report?token=0x…see /openapi.jsonFull token due-diligence report (security + liquidity + metadata) in one call

Security

EndpointPriceReturns
GET /scan/mcp?url=$0.05Security audit of a target MCP server: tool-poisoning / prompt-injection / exfiltration / dangerous-capability / hidden-unicode (OWASP LLM01/LLM08) + risk score
POST /scan/mcp {"tools":[…]}$0.05Zero-egress audit — paste your own tools/list array; same itemized findings, nothing leaves your side and we never fetch/call your server. For OAuth-gated or private MCP servers that won't expose a URL
GET /enrich/tech-risk?domain=$0.05Tech-stack fingerprint → CVE (NVD) + EPSS + CISA-KEV attack-surface risk
GET /enrich/domain?domain=$0.01Firmographic + tech-stack enrichment, incl. full subdomain enumeration (subdomains[]) via crt.sh certificate-transparency logs, RDAP, DoH, HTTP fingerprint

x402 payment verification (before and after your agent pays)

EndpointPriceReturns
GET /x402/preflight?url=$0.001Pre-pay check on any x402 endpoint: will it settle, is the payee safe (OFAC / scam lists), price accuracy, delivery readiness, liveness → PAY / CAUTION / AVOID
GET /x402/receipt-verify?tx=&url=$0.004Post-pay proof: reads the Base settlement tx from two independent RPCs and reconciles the USDC Transfer against the endpoint's own live 402 (payTo + amount) → SETTLED / UNDERPAID / WRONG_RECIPIENT / NO_TRANSFER / REVERTED / NOT_FOUND / UNVERIFIED

Free in MCP: x402_receipt_verify_preview (tx + payto, no payment).

Python agents, no key or wallet: uvx --from greyridge-x402-tools greyridge-x402-verify runs a local stdio MCP server (PyPI 0.6.0) with free x402_preflight and x402_receipt_verify tools. Add it to Claude Desktop/Cursor as command uvx, args --from greyridge-x402-tools greyridge-x402-verify.

Try it now, no key: curl "https://api.greyridgesignals.ai/x402/preflight/preview?url=https://api.greyridgesignals.ai/defi/yields" returns verdict: PAY, will_settle: true with the per-check detail (reachability, challenge, accepts, price accuracy, delivery).

Drop-in safe pay wrapper (free preflight, refuses AVOID, then dual-RPC receipt check on the settlement tx):

  • Python: pip install greyridge-x402-tools (0.7.0), from greyridge_x402.safe_fetch import safe_fetch
  • Node: npm install github:rezearcher/greyridge-x402-tools, import { safeFetch, PreflightBlocked } from "greyridge-x402-tools" (pass your own x402 fetch, e.g. wrapFetchWithPayment)

Already paying with @x402/fetch, wrapFetchWithPayment or a payer MCP such as Crypto APIs' x402_pay? Those pay and hand back the response body; none of them checks that the settlement tx actually moved the advertised amount to the advertised payTo. Keep your payer, and add the verify step after it: pass the tx hash from the X-PAYMENT-RESPONSE header and the URL you paid to x402_receipt_verify. It returns SETTLED, UNDERPAID, WRONG_RECIPIENT, NO_TRANSFER, REVERTED or NOT_FOUND. The x402 FAQ tells buyers to check the transaction themselves; this is that check, in one call.

How x402_receipt_verify differs from the read-only verifier @tensorfeed/x402-base-mcp (verify_x402_settlement, checked against its 0.2.1 README): theirs matches a Transfer against a recipient and amount the caller types in. Ours can pull payTo and amount from the endpoint's live 402 (?url=), so a wrong or stale expectation doesn't pass, and it compares two RPC providers and fails closed if they disagree. Theirs is a good fit if you just want generic Base reads (balances, eth_call) in the same server; ours only does verification.

Free previews: GET /crypto/prices/preview, /crypto/funding/preview, /defi/yields/preview, /chain/block-number/preview, /chain/gas-price/preview (full live data, not truncated), /scan/mcp/preview?url=. Zero-egress MCP scan (for private/OAuth-gated servers): POST /scan/mcp/preview with {"tools":[…]} is the free counts-only preview; POST /scan/mcp with the same body is the paid itemized scan — nothing leaves your side. One-liner: examples/mcp-scan-preview.sh.

MCP server (the pull channel)

Add one remote MCP server and your agent gets the whole toolset. initialize and tools/list are free so agents can discover the tools; paid tools/call returns an x402 challenge.

tools/list advertises 22 tools: crypto_prices, crypto_funding, defi_yields, pm_markets, chain_block_number, chain_gas_price, chain_balance, chain_token_balance, chain_tx, chain_wallet, chain_token_security (paid Base RPC + data, EIP-7702 delegated-EOA aware), crypto_prices_preview, crypto_funding_preview, defi_yields_preview, pm_markets_preview, chain_block_number_preview, chain_gas_price_preview, chain_token_security_preview (free), and scan_mcp_server, scan_mcp_preview, enrich_tech_risk, enrich_domain (security).

jsonc
// add to your MCP client config{  "mcpServers": {    "grey-ridge-x402": {      "type": "streamable-http",      "url": "https://x402-data-api.sigrunner.workers.dev/mcp"    }  }}

MCP client (mcp-client/ — the stdio companion)

For stdio-only MCP clients (Claude Desktop, Cursor, CLI agents), the repo ships a companion package, x402-data-api-mcp, in mcp-client/. It runs on the agent's own machine, speaks MCP over stdio, and proxies to the same Worker /mcp endpoint — it adds no data surface, just a transport + x402 payment shim so stdio-only clients can reach the same tools (22 tools, including paid ones when a wallet key is configured).

Install / run (local path). The package is not yet published to npm, so run it from the repo:

bash
cd mcp-clientnpm installnpm run build          # tsc → dist/server.jsnode dist/server.js    # start (or: npm start)

Published path (one line, no clone): npx @grey-ridge/x402-data-api-mcp — the package is live on npm; its bin target is dist/server.js, so npx runs the same server.

Configuration. Copy mcp-client/.env.example to .env in mcp-client/: WORKER_BASE_URL defaults to the deployed Worker (set it only to point at your own mirror), and X402_WALLET_PRIVATE_KEY is optional — set it to auto-settle paid tools (HTTP 402) via x402; leave it empty to run only the free/preview tools. The client reads both straight from process.env at startup.

jsonc
// stdio client config (local path){  "mcpServers": {    "grey-ridge-x402-local": {      "command": "node",      "args": ["/absolute/path/to/mcp-client/dist/server.js"]    }  }}

Call it (HTTP)

bash
BASE=https://x402-data-api.sigrunner.workers.dev
# free preview — real sample, no paymentcurl -s "$BASE/crypto/funding/preview"
# paid — returns HTTP 402 with an x402 payment-required challenge until you attach paymentcurl -i "$BASE/crypto/funding?limit=10"

Any x402-capable client (e.g. the x402 libraries) handles the 402 → sign → retry automatically.

Measured status

Uptime and latency per safety route are measured from a probe cron and published in docs/STATUS.md (regenerated hourly; window stated in the file, not an SLA).

How it runs

A single Cloudflare Worker implements every HTTP endpoint and the MCP server behind a method-aware x402 gate. All upstreams are free/keyless public APIs (DefiLlama, Hyperliquid, OKX, Polymarket Gamma, Base JSON-RPC, NVD/EPSS/CISA-KEV, crt.sh/RDAP/DoH); every address/hash/domain input is validated and SSRF-guarded (fixed upstream hosts, no user-supplied targets except the explicitly-scoped /scan/mcp and enrichment endpoints).

License

MIT — see LICENSE.

Agent-framework plugins (published)

Pre-trade token guard (/gate/swap, $0.008 USDC via x402 on Base) — drop-in, fails closed, pays inline per call (no API key, no account). Free sample: curl "https://x402-data-api.sigrunner.workers.dev/gate/swap/preview?token=degen"

FrameworkInstallSource
ElizaOSnpm i github:rezearcher/plugin-swap-gateintegrations/elizaos-plugin-swap-gate
LangChain.jsnpm i github:rezearcher/langchain-swap-gate @langchain/core zodintegrations/langchain-swap-gate
Vercel AI SDKnpm i github:rezearcher/vercel-ai-swap-gate ai zodintegrations/vercel-ai-sdk-swap-gate

Install from git — this always pulls the current build (keyless free preview + inline x402, fails closed only if both are unreachable) and compiles on install via prepare. Each also exposes a tokenReport tool wrapping /chain/token-report for standalone token screening. Minimal copy-paste examples live under docs/examples/{swap-gate,langchain,elizaos}/.

Market-data buyer (for agents that buy a price and must not present stale data as real-time — the Decision402 pattern): examples/market-data-decision-buyer.mjs. Runs the full agentic loop — reads the live 402 quote, enforces a per-call USDC budget, proves the feed via the free preview, pays /crypto/prices ($0.001 on Base), then rejects any row older than MAX_AGE_SECONDS. Steps 1-3 run with zero npm installs: node examples/market-data-decision-buyer.mjs bitcoin,ethereum.

Python / LangChain / CrewAI

pip install "git+https://github.com/rezearcher/greyridge-x402-tools" — token_report() and swap_gate() helpers (free preview by default, paid x402 mode optional) plus LangChain tools. Guides: https://rezearcher.github.io/greyridge-x402-tools/

Try it on YOUR token, free

curl "https://x402-data-api.sigrunner.workers.dev/chain/token-report/preview?token=0xYourBaseToken" returns the same full-depth report as the paid route ($0.01). /gate/swap/preview?token=0x… gives 3 free real-token GO/HOLD/BLOCK checks/day/IP.

Agent skill (drop-in SKILL.md for OpenClaw/Hermes-style agents): https://github.com/rezearcher/greyridge-token-safety-skill

CI gate for MCP servers

uses: rezearcher/[email protected] with url: runs the free MCP tool-poisoning preview in CI and fails on a block verdict. Every run also emits a copy-paste README injection-security badge (badge-markdown output / step summary; commit-badge: true auto-commits it between <!-- grsg-badge:start --> markers, degrade-open) — the OWASP-MCP (LLM01/LLM08) dimension generic repo-quality badges omit, re-checked on every CI run and linked to the server's live security report. Listed on the GitHub Marketplace. See actions/mcp-scan/README.md.

Python note: the default Python-urllib User-Agent is rejected with 403 at the Cloudflare edge. Use requests/httpx, or set any custom User-Agent header.

Source: README.md at commit 762bab1

Tools

34

enrich_tech_risk

Security enrichment: tech-stack fingerprint + CVE mapping + EPSS + CISA KEV + verdict (clear/review/block) for a domain. Cost: $0.005 USDC per call (x402 micropayment).

Parametersdomaintechstack

enrich_domain

Firmographic + tech-stack enrichment: RDAP registrant/registrar, DNS records, full subdomain enumeration + certificate-transparency history, tech-stack fingerprint, verdict (clear/review/block, based on domain age) for a domain. Cost: $0.005 USDC per call via the shared MCP payment gate (the direct HTTP endpoint GET /enrich/domain is $0.01 — MCP tools/call is gated at a flat $0.005 per request).

Parametersdomainrequired

scan_mcp_server

Security-audit a target MCP server for prompt-injection / tool-poisoning. Fetches the server's advertised tools and statically analyzes each for hidden instructions, data-exfiltration hints, dangerous capabilities, cross-tool shadowing, and invisible-unicode payloads (OWASP LLM01/LLM08). Returns findings + a 0-100 risk score + verdict (clear/review/block). Cost: $0.005 USDC per scan via x402 (GET /scan/mcp HTTP variant is $0.05).

Parametersurlrequired

scan_mcp_preview

FREE preview scan of a target MCP server for tool-poisoning / prompt-injection. Returns issue count, severity breakdown, risk score, and verdict (clear/review/block) — but NOT which tools or the evidence. Use this to check any MCP server (including your own) at no cost; if issues are found, call the paid scan_mcp_server for the itemized findings + remediation. No payment required.

Parametersurlrequired

crypto_prices

Live spot token prices (price, change_24h, symbol, confidence, timestamp) for CoinGecko ids, sourced from DefiLlama. Cost: $0.005 USDC per call via x402.

Parameterscoins

crypto_funding

Live 6-venue perpetual-futures funding rates from Binance+Bybit+OKX+Hyperliquid+dYdX+Gate (per-venue rate, per-venue open interest in USD, an OI-WEIGHTED CEX↔DEX arb verdict — funding_spread_bps + cheapest-long/richest-short venue computed over an OI-screened set so a thin-book outlier never names an unexecutable venue; excluded_thin_venues + oi_weighted flag report what was screened — premium/basis, annualized_hl/okx/binance/bybit/gate, LONGS_PAY/SHORTS_PAY/NEUTRAL signal, next_funding_ts, mark/oracle price, day volume), ranked by volume. Venues unreachable or not listing a coin are omitted per-coin — Hyperliquid is always present. Cost: $0.004 USDC per call via x402.

Parameterslimit

defi_yields

Live DeFi lending/LP yield pools (project, chain, symbol, pool id, APY breakdown incl. 1d/7d/30d trend + apyBase7d/apyMean30d, IL risk incl. il7d, exposure, reward/underlying tokens, outlier flag, mu/sigma, DefiLlama stability forecast, TVL, stablecoin flag) from DefiLlama, ranked by TVL (or risk-adjusted APY = apy/sigma). Cost: $0.005 USDC per call via x402.

Parameterssortchainlimitstableproject

yield_entry_verdict

Per-pool DeFi yield-entry go/no-go. Pass a DefiLlama poolId (the 'pool' field from defi_yields) and get a packaged SUSTAINABLE | DECAYING | OUTLIER | AVOID verdict + 0-100 risk score + field-cited reasons, built from the pool's APY trend (1d/7d/30d), DefiLlama stability forecast, impermanent loss (il7d), volatility (sigma), outlier flag and TVL. Optional token (0x underlying, Base) adds a honeypot-check pointer. The should-I-enter-THIS-pool call after defi_yields. Cost: $0.01 USDC per call via x402.

Parameterspoolrequiredtoken

simulate

Will this Base transaction revert? Prospective-tx dry-run via eth_simulateV1: pass from, to, optional data (0x calldata) and value (wei) and get will_revert + revert_reason + gas_used + token asset_changes BEFORE the agent spends gas sending it. Keyless, Base-native, Tenderly/Alchemy-class output with no API key. Use before a swap/approve/transfer or alongside gate_swap. Cost: $0.005 USDC per call via x402.

Parameterstorequireddatafromrequiredvalue

pm_markets

Live Polymarket prediction-market data — question, outcomes, outcome prices, bestBid/bestAsk/spread, volume24hr/volume1wk, oneDayPriceChange, clobTokenIds, conditionId, category tags, liquidity, end date — ranked by volume24hr. Cost: $0.005 USDC per call via x402.

Parameterslimitquery

crypto_prices_preview

FREE 1-item sample of live token prices. No payment required.

Takes no parameters.

crypto_funding_preview

FREE 1-item sample of live cross-venue funding rates. No payment required.

Takes no parameters.

defi_yields_preview

FREE 1-item sample of live DeFi yield pools. No payment required.

Takes no parameters.

yield_entry_verdict_preview

FREE sample yield-entry verdict for the current top-TVL pool. Shows the packaged SUSTAINABLE/DECAYING/OUTLIER/AVOID + risk-score output shape before you pay. No payment required.

Takes no parameters.

simulate_preview

FREE sample prospective-tx dry-run (benign 0-value call) showing the will_revert/gas_used/asset_changes output shape before you pay. No payment required.

Takes no parameters.

pm_markets_preview

FREE top-1 sample of live Polymarket prediction markets, ranked by volume24hr. No payment required.

Takes no parameters.

chain_block_number

Current Base mainnet block number via multi-provider JSON-RPC (automatic failover across 4 providers, never fails on one provider's rate limit). Cost: $0.005 USDC per call via x402.

Takes no parameters.

chain_gas_price

Current Base mainnet gas price (wei/gwei), EIP-1559 base_fee_gwei/priority_fee_gwei, and gas_price_usd (ETH price cross-call — no price oracle on ETH-only competitors) via multi-provider JSON-RPC. Cost: $0.005 USDC per call via x402.

Takes no parameters.

chain_balance

Native ETH balance of a Base mainnet address, incl. balance_usd (ETH price cross-call — no price oracle on ETH-only competitors), via multi-provider JSON-RPC. Cost: $0.005 USDC per call via x402.

Parametersaddressrequired

chain_token_balance

ERC-20 token balance of a Base mainnet address via multi-provider JSON-RPC, incl. symbol/decimals/balance_formatted (per-token-contract cached in-isolate). Cost: $0.005 USDC per call via x402.

Parameterstokenrequiredaddressrequired

chain_tx

Transaction details by hash on Base mainnet via multi-provider JSON-RPC. Cost: $0.005 USDC per call via x402.

Parametershashrequired

chain_wallet

Wallet screening bundle (balance, activity, contract vs EOA check): ETH balance + balance_usd (ETH price cross-call) + tx count + contract-code check (EIP-7702 delegated-EOA aware) for a Base mainnet address, in one call. Cost: $0.005 USDC per call via x402.

Parametersaddressrequired

chain_wallet_screen

Is this wallet sanctioned OR a known scammer? Pre-trade screen for a counterparty / recipient / token-spender address before an agent sends, swaps or approves: exact match against (1) the U.S. Treasury OFAC SDN crypto-address list and (2) community scam/phishing/wallet-drainer threat-intel (ScamSniffer + MEW darklist). Returns sanctioned (bool) + malicious (bool) + verdict (blocked/clear) + the list sources and snapshot dates. 'clear' means not on these lists — not a safety guarantee. Cost: $0.004 USDC per call via x402.

Parametersaddressrequired

x402_preflight

Should an agent pay this x402 endpoint? Pre-payment check of an UNKNOWN x402 URL: fetch it once (never pays) to validate the 402 challenge + accepts[] (scheme/network/payTo/amount/asset/resource = will it settle) AND label its LIVENESS (LIVE | ZOMBIE | DEAD — is it a working payable endpoint right now, or listed-active-but-broken) AND flag an absolute PRICE TRAP (a honeypot charging >= $1,000/call trips AVOID even when its advertised==live price looks self-consistent; pass max=<usdc> for your own budget ceiling) AND scan the resource + any advertised MCP tools for LLM01/LLM08 prompt-injection and screen payTo against the OFAC SDN + community scam lists (safe to pay) AND verify the PRICE — does the live accepts[].amount match the advertised price? pass advertised=<usdc> (the figure your catalog quoted) or it self-checks the endpoint's /.well-known/x402: MATCH | OVERCHARGE | UNDERCHARGE. Optional samples=N (1-5) runs a reliability/payability burst (settle-consistency + latency; a flapping endpoint downgrades PAY to CAUTION). Returns verdict PAY | CAUTION | AVOID + per-check fix hints + latency. Read-only, never a settlement guarantee. Cost: $0.001 USDC per call via x402.

Parametersmaxurlrequiredsamplesadvertised

x402_receipt_verify

Did my x402 payment actually settle? POST-payment on-chain proof — the other half of x402_preflight (which checks BEFORE paying). Bring your Base settlement tx hash + the resource URL you paid, and this reads the tx receipt from Base mainnet, decodes its USDC Transfer events, and reconciles them against the endpoint's advertised payTo + amount (resolved from the resource's live 402, or pass payto/expect to bind it directly). Returns verdict SETTLED | UNDERPAID | WRONG_RECIPIENT | NO_TRANSFER | REVERTED | NOT_FOUND | UNVERIFIED, the matched transfer, and all USDC transfers in the tx. Read-only ground truth; confirms settlement to the right address + amount, not off-chain resource delivery. Cost: $0.004 USDC per call via x402.

Parameterstxrequiredurlpaytoexpect

x402_receipt_verify_preview

FREE keyless x402 settlement check on Base: pass a tx hash plus payto (and optionally expect, in USDC). Dual-RPC reads the receipt, decodes USDC Transfers and returns SETTLED | UNDERPAID | WRONG_RECIPIENT | NO_TRANSFER | REVERTED | NOT_FOUND. Binds to the payTo you supply; resolving the payTo from a live 402 url is the paid x402_receipt_verify.

Parameterstxrequiredpaytorequiredexpect

chain_token_security

Token security / honeypot detector for a Base mainnet ERC-20: EIP-1967/1822 proxy + upgradeability detection, bytecode dispatcher scan for mint/pause/blacklist/fee-setter/ownership selectors, owner() renouncement check, and a live eth_call state-override simulation testing whether a synthetic wallet can actually transfer() the token. Returns risk_score (0-100) + verdict (clear/review/block) + human-readable flags. Real compute an agent can't trivially self-serve. Cost: $0.005 USDC per call via x402.

Parameterstokenrequired

chain_block_number_preview

FREE live sample of the current Base mainnet block number — identical data to the paid chain_block_number tool. No payment required.

Takes no parameters.

chain_gas_price_preview

FREE live sample of the current Base mainnet gas price — identical data to the paid chain_gas_price tool. No payment required.

Takes no parameters.

chain_token_report

Token security check (honeypot detector + rug-pull risk score) for a Base ERC-20 in one call, decision-grade trade-safety verdict: SAFE | CAUTION | AVOID plus risk_score (0-100) and reasons, bundling honeypot/sellability simulation, owner-renounced + mint/pause/blacklist/fee-setter/upgradeable-proxy checks, token symbol/name/decimals, and Uniswap v3 WETH-pool liquidity (USD). Replaces many RPC calls and prevents a bad trade. Cost: $0.005 USDC per call via the shared MCP payment gate (the direct HTTP endpoint GET /chain/token-report is $0.01 — MCP tools/call is gated at a flat $0.005 per request).

Parameterstokenrequired

gate_swap

Pre-trade GO / HOLD / BLOCK gate for a Base ERC-20 swap: honeypot/sellability + admin-control checks + Uniswap v3 liquidity vs. your trade size. Returns a top-level `sized_verdict` one-liner (decision + pool-depth % + max-safe size + round-trip breakeven + exit recovery, read in one shot) AND the full decision-grade sizing — per $100 / $1k / $10k / $50k (and your exact notional_usd): entry-slippage + exit-simulation (net USD recovered vs lost to slippage), round-trip breakeven move %, and max_safe_notional_usd. Cost: $0.005 USDC per call via the shared MCP payment gate (the direct HTTP endpoint GET /gate/swap is $0.008 — MCP tools/call is gated at a flat $0.005 per request).

Parameterssidetokenrequirednotional_usd

gate_swap_preview

FREE live sample of the gate_swap pre-trade GO/HOLD/BLOCK decision for a demo Base token (usdc|weth|cbbtc|aero|degen), same shape as the paid gate_swap tool. The paid gate_swap tool additionally returns a top-level `sized_verdict` one-liner plus the full `sizing` object (entry/exit slippage simulation + round-trip breakeven + max_safe_notional_usd); the `paid_adds` block here names those fields. No payment required.

Parameterssidetokennotional_usd

chain_token_report_preview

FREE full real trade-safety report (SAFE/CAUTION/AVOID verdict) for Base USDC, same depth as the paid chain_token_report tool. No payment required.

Takes no parameters.

chain_token_security_preview

FREE full real analysis of a fixed well-known token (Base WETH) via the token security / honeypot detector — same depth as the paid chain_token_security tool, so you can see the real product before paying. To analyze an arbitrary token, use the paid chain_token_security tool. No payment required.

Takes no parameters.

Version history

5
  1. v0.1.7LatestNov 4, 2026
  2. v0.1.6Oct 31, 2026
  3. v0.1.5Oct 29, 2026
  4. v0.1.4Oct 22, 2026
  5. v0.1.1Oct 19, 2026

Score

100% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

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