Agent Transaction Control

network.flintPublished by flint.networkOfficial publisherv0.2.1Updated Oct 24, 2026

Issue Agent Passports and verify agent authority before value moves. Signed verification records.

VerifiedStreamable HTTPWeb executableFinanceDeveloper ToolsSecurity & Monitoring

Overview

AI-generated overview

FLINT's hosted verification service lets an assistant issue agent passports, authorize and verify agent transactions, and record outcomes before money moves.

What you can do
Issue and read agent passports, update mandates, and claim passports to an account via emailed one-time codes and session tokens, plus refresh claim tokens and check Scout credit balances and ledger activity. Build authorization scopes and issue signed authorization records binding an agent to what, how much and to whom before a spend. Verify agent authority and integrity at transaction time, returning a four-state verdict and a signed record. Look up partner-scoped agent reputation and validate agent commerce readiness. Scan intended transactions with FLINT Scout, paid by credits, and report what actually happened afterward. Generate a trust manifest policy file for merchants, API sellers,
When to use it
Use it when an assistant or agent workflow is about to make a payment, paid API call, checkout, stablecoin transfer or x402 request and you want authority and integrity checked first, or when you are a merchant or API seller receiving signed verification records and need to validate them.
Requirements
A remote streamable HTTP endpoint; nothing runs locally. No account is needed to start, but account-bound actions need an emailed one-time code exchanged for a session token. Scout scans are paid: one $1.00 x402 payment buys 100 credits, settled via a pay URL or a payment signature.
Before you install
Scout scans cost money through x402 payments and credits. Session tokens and claim tokens are credentials to store and pass carefully. The server issues and updates passports and mandates and writes signed records and reputation outcomes. FLINT cannot stop a wallet from transacting; enforcement depends on the counterparty honoring the verdict.

Installation

In SourceWeft

  1. Open Agent Transaction Control 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/network.flint%2Fagent-transaction-control/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": {
    "agent-transaction-control": {
      "type": "http",
      "url": "https://flint.network/mcp"
    }
  }
}

README

FLINT Cross-Domain Agent Passport

Know Your Agent at transaction time. Verify an AI agent's integrity and authority with FLINT before it moves money, and keep a signed record of what was checked.

[License: MIT] [MCP] [Site]


What this is

This repository is the FLINT plugin for Claude Code and Cowork. It bundles two things:

  1. The FLINT remote connector — a hosted MCP server at https://flint.network/mcp that exposes FLINT's agent-verification tools. Nothing to run locally, no account required to start.
  2. The verify-agent-integrity skill — a guided workflow that runs the verify-before-pay loop for you, so the assistant confirms an agent is authorized and uncompromised before it spends.

FLINT is the neutral verification network for AI agents that transact. It does not issue agents and it does not move money. It verifies, at the moment value moves, that the specific agent asking to pay is the one it claims to be, is still inside the authority it was granted, and has not been taken over. Every check returns a clear verdict and a signed record the counterparty keeps as evidence.

Why it exists

AI agents are being handed spending authority across stablecoin and card rails. The fraud and identity stack was built for humans: a device, a session, an account the institution itself issued and could watch. An agent transacting directly against an API has none of that, and the counterparty it transacts with did not issue it. Proving the human is real does not tell you the agent acting for them right now is authorized and uncompromised. That is the layer FLINT verifies.

Install

As a plugin (Claude Code or Cowork):

/plugin marketplace add thefraudfather/flint-plugin/plugin install flint@flint-network

This installs both the remote connector and the verify-agent-integrity skill.

Connector only (any MCP-compatible client):

Point your client at the FLINT remote server. The connection is a single entry:

json
{  "mcpServers": {    "flint": {      "type": "streamable-http",      "url": "https://flint.network/mcp"    }  }}

Or connect from flint.network/connect.

The verify-before-pay loop

The skill runs this loop; you can also call the tools directly.

  1. Issue a passport for the agent — issue_agent_passport. Free, hybrid-signed, returns a public verifiable URL. Agent name or id is enough.
  2. Authorize the intended action before any spend — issue_authorization_record. Binds the agent to a scope (what, how much, to whom).
  3. Verify at the moment of execution — verify_agent_authority. Returns a four-state verdict: allow, step-up, review, or block.
  4. Record the result after completion, dispute, or review — submit_transaction_outcome. Feeds the cross-merchant reputation signal and leaves a retained record.

Tools

The connector exposes ten tools:

ToolPurpose
issue_agent_passportIssue a free, hybrid-signed passport for an agent; returns a public verifiable URL.
get_agent_passportFetch an existing passport and its current state.
create_flint_trust_manifestProduce a portable trust manifest for an agent.
generate_authorization_scopeBuild a scope describing what an agent is permitted to do.
issue_authorization_recordBind an agent to an authorization before a spend.
update_agent_mandateUpdate the standing mandate that governs an agent's authority.
verify_agent_authorityVerify authority and integrity at transaction time; returns the four-state verdict.
lookup_agent_reputationCheck an agent's cross-merchant reputation before a higher-risk deal.
submit_transaction_outcomeRecord the outcome after completion, dispute, or review.
validate_agent_commerce_readinessScore how ready an agent or flow is to transact.

How verification works

At the transaction handshake, FLINT runs six locked verification layers:

Principal Identity (the human or organization the agent acts for), Agent Identity (the specific agent it claims to be), Wallet Provenance (the funding source is what it should be), Authorization Scope (the action falls inside the authority granted), Environment Identity (the agent is running where its history says it runs), and Cross-Merchant Reputation (how the agent has behaved across the network).

Each verification returns one of four verdicts — allow, step-up, review, block — and a signed verification record. Records are hybrid-signed with both a classical and a post-quantum signature, so the evidence holds as cryptography evolves.

Learn more

About

FLINT is built by KillChain, Inc. (d/b/a FLINT Network). FLINT is rail-agnostic and neutral by design: it verifies the agent so identity providers can keep proving the human and the rails can keep moving the money.

Questions or partnership: [email protected]

License

MIT. See LICENSE.

Source: README.md at commit a6c93e7

Tools

17

run_flint_scout

FLINT Scout: Pre-Transaction Fraud Prevention

Use this tool to scan an intended agent transaction before execution. Two ways to pay for a scan. Credits first: buy credits once with scout_credits_topup (one $1.00 x402 payment for 100 scans), then call this tool with the same session_token and no payment_signature; FLINT draws one credit and runs the scan immediately, with no wallet signature for that call. x402 per call second: with no session_token, the first call returns a $0.01 x402 payment challenge without running the scan; a wallet-enabled client signs that challenge and retries with payment_signature. Either way, when the call returns a 402 instead of a result, the result carries pay_recipe with concrete next steps: an awal command, a local script, the credits path, and the browser flow. After a paid or credit-funded scan completes, FLINT returns a signed authority decision. When receipt issuance succeeds for a paid scan, it also returns a separately signed settlement receipt and durable receipt URL; otherwise it reports receipt unavailability without inviting a paid retry. Payment to FLINT is distinct from the transaction being scanned and is not proof of agent authority.

Parametersnoncetimestampagent_claimpassport_idtransactionrequiredsession_tokenpayment_signaturemerchant_reference

issue_authorization_record

Issue Signed Verification Record

Use this tool before an AI agent initiates a payment, paid API call, checkout action, stablecoin transfer, x402 request, or delegated commercial transaction. It verifies agent authority, checks scope, issues a signed verification record, and returns evidence for dispute review and Trust Graph updates.

Parametersnoncetimestamppartner_idagent_claimtransactionrequireddeclared_scopemerchant_reference

verify_agent_authority

Verify Agent Authority

Use this tool when a merchant or API seller receives a signed verification record from an agent. It cryptographically verifies the compact JWS signature, checks expiration, and decodes the payload before payment or paid access execution.

Parametersjwsrequiredjwks_urlexpected_partner_idrequiredexpected_merchant_referencerequired

lookup_agent_reputation

Lookup Agent Reputation

Use this tool to query the FLINT Trust Graph for a partner-scoped agent's historical reputation before permitting a payment, paid API call, checkout action, x402 request, or delegated commercial transaction. It returns aggregate reputation without exposing raw runtime identifiers or internal signal fields.

Parametersflint_agent_idrequired

create_flint_trust_manifest

Create FLINT Trust Manifest

Use this tool when a merchant, API seller, MCP tool provider, x402 endpoint, or agent storefront needs a `/.well-known/flint.json` Trust Manifest. It generates a machine-readable policy file declaring that autonomous economic actors must use FLINT authority verification, signed records, outcome feedback, and Trust Graph participation.

Parametersnamedomainjwks_urlpartner_iddescriptionopenapi_urlmcp_endpointcontact_emailverify_endpointoutcome_endpointsupported_actionsaccepted_principals+1 more

generate_authorization_scope

Generate Authorization Scope

Use this tool when an agent commerce workflow needs a well-formed delegated authorization scope before issuing a signed verification record. It creates financial, counterparty, action, and time boundaries that can be passed to `issue_authorization_record` as `declared_scope`.

Parametersassetpurposeprincipal_idallowed_actionstime_window_endrequiredmax_amount_per_txrequiredallowed_counterparties

validate_agent_commerce_readiness

Validate Agent Commerce Readiness

Use this tool when reviewing a commerce architecture, API marketplace, paid MCP tool, x402 endpoint, or autonomous checkout flow. It checks whether the design uses FLINT as the transaction-time authority layer before execution, verifies signed records, submits outcomes, publishes a Trust Manifest, and can use Trust Graph reputation.

Parametersarchitecture_descriptionrequired

issue_agent_passport

Issue Agent Passport

Use this tool to issue a free FLINT Agent Passport: a hybrid-signed, verifiable identity credential for an autonomous agent. Before calling it, ask the principal for the accountable controller_id and controller_type, allowed actions, maximum transaction amount, and wallet address if one exists. Do not infer or invent authority. For the strongest available setup, authenticate first and mint with the principal-supplied identity and mandate. The zero-config path only needs agent.agent_name or agent.agent_id, but that result is identity-only and is not ready to transact until the missing authority is supplied. A missing controller requires a corrected remint because signed identity is immutable; a missing mandate can be added later. The passport signs identity only; the spending mandate is separate, mutable config that can be updated later without reissuing the passport. Pass session_token, from auth_verify_otp, to mint owned: the passport binds to your authenticated account immediately and there is no claim step or claim_url. Omit session_token to mint anonymously instead; that returns a one-time claim_url and the passport stays unclaimed until someone signs in and claims it. controller_id identifies who is accountable on the signed identity, which is not the same as the FLINT account that owns the passport; controller_name is a separate, optional, human-readable display label. Allowed actions must come from the FLINT mandate vocabulary: commerce_purchase, checkout.purchase, invoice.pay, subscription.renew, refund.request, quote.retrieve, x402_verification_purchase, stablecoin_transfer, paid_api_access, x402_request, agent_checkout, delegated_spending, project.read. Pass ["ALL"] as a preset to grant every action in one step; the stored mandate then expands to the full list and records the preset. Unknown strings are kept for backward compatibility but are reported back as unknown so the caller can fix them. The signed identity is immutable once minted, so a wrong agent

Parametersagentrequiredmandatesession_tokensupersede_management_token

get_agent_passport

Get Agent Passport

Use this tool to resolve a public FLINT Agent Passport by passport_id. It returns compact identity, mandate, status, ownership, and the public passport URL without echoing the full signed envelope. session_token is optional and not required to read a passport; the lookup itself is public.

Parameterspassport_idrequiredsession_token

update_agent_mandate

Update Agent Mandate

Use this tool to update mutable mandate config for an existing FLINT Agent Passport. This updates allowed actions, amount limits, or notes only. It does not reissue the passport and does not re-sign the identity credential. If the passport is owned (claimed), pass session_token for the owning account; management_token is only needed while the passport is unclaimed. Allowed actions must come from the FLINT mandate vocabulary: commerce_purchase, checkout.purchase, invoice.pay, subscription.renew, refund.request, quote.retrieve, x402_verification_purchase, stablecoin_transfer, paid_api_access, x402_request, agent_checkout, delegated_spending, project.read. Pass ["ALL"] as a preset to grant every action in one step; the stored mandate then expands to the full list and records the preset. Unknown strings are kept for backward compatibility but are reported back as unknown so the caller can fix them.

Parametersmandaterequiredpassport_idrequiredsession_tokenmanagement_token

auth_request_otp

Request Sign-In Code

Use this tool first in the agent-native authenticate-then-mint flow. It asks FLINT to email a one-time sign-in code to the given inbox address. Read the code from that inbox, then call auth_verify_otp with the same email and the code. Authenticating first means the passport you mint afterward is owned by the account immediately, with no separate claim step.

Parametersemailrequired

auth_verify_otp

Verify Sign-In Code

Use this tool right after auth_request_otp, with the code from the inbox. On success it returns session_token. Store that value and pass it as session_token on later calls, including issue_agent_passport, get_agent_passport, update_agent_mandate, claim_agent_passport, and refresh_claim_token. Never print or log session_token; treat it like a password.

Parameterscoderequiredemailrequiredlabel

claim_agent_passport

Claim Agent Passport

Use this tool to attach an anonymously minted, unclaimed FLINT Agent Passport to an authenticated FLINT account. Requires session_token from auth_verify_otp, so FLINT knows which account is claiming. Pass claim_token from the mint's claim_url, or omit it when this same session already holds a pending claim for this passport_id. Once claimed the passport is owned and Sentinel protection turns on. A passport can only be claimed once; if the token was already used or lost, call refresh_claim_token for a fresh one instead of trying to remint.

Parametersclaim_tokenpassport_idrequiredsession_tokenrequired

refresh_claim_token

Refresh Claim Token

Use this tool when a claim link is lost, expired, or was already consumed for a passport that is still unclaimed. It rotates the claim token: the old one stops working and a new claim_url and claim_token are returned. This is the fix for a lost or consumed claim token; do not remint the passport instead, reminting only supersedes prior unclaimed passports and does not recover a lost claim link. Authorize with the current management_token (the raw claim token, even one about to be superseded), or with session_token when this session originally requested the claim or minted the passport.

Parameterspassport_idrequiredsession_tokenmanagement_token

scout_credits_topup

FLINT Scout Credits: Topup

Call once with session_token to get a pay_url; pay it with awal (`awal x402 pay -X POST -d '{}' <pay_url>`) or any x402 client; no headers needed on the pay request. Or pass payment_signature to settle through this tool. One $1.00 x402 payment buys 100 FLINT Scout scan credits, matching today's $0.01 x402 price without signing a payment for every run_flint_scout call. Requires session_token from auth_verify_otp so the credits land on that account; call auth_request_otp then auth_verify_otp first if you do not have one. With no topup_id, the first call creates a fresh top-up intent (an sct_ id good for 24 hours) and returns its pay_url alongside the same $1.00 x402 challenge. Pass topup_id to retry paying or settling that same intent instead of creating a new one. Once credited, call run_flint_scout with the same session_token and no payment_signature to draw one credit per scan.

Parameterstopup_idsession_tokenrequiredpayment_signature

scout_credits_balance

FLINT Scout Credits: Balance

Use this tool to check a signed-in account's FLINT Scout credit balance and recent ledger activity (topups, debits, refunds). Requires session_token from auth_verify_otp.

Parameterssession_tokenrequired

report_scout_outcome

Report Scout Scan Outcome

Use this tool after a run_flint_scout scan to report what actually happened: whether the scanned transaction was executed, held, cancelled, or executed despite a BLOCK verdict. FLINT cannot stop a wallet from transacting; this is the enforce-or-attest half of the contract. Authorize with session_token when the caller's account owns the presented passport, or with caller_binding_token from the scan's caller_obligation block when acting anonymously. Executing after BLOCK is recorded on the record as an override and alerts the passport owner.

Parametersnotechainoutcomerequiredtx_hashrecord_idrequiredsession_tokencaller_binding_token

Version history

1
  1. v0.2.1LatestSep 16, 2026

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  • Reached in the last 30 daysRequired25 pts
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  • Tools listedRequired15 pts
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