# Agent Transaction Trust

> Authorize and prove autonomous x402/AP2 agent payments with cryptographic receipts.

- name: io.github.grupoanesthy-spec/agent-transaction-trust
- version: 1.0.0
- connection class: R0 (autonomous)
- trust: 77/100 flags: no-repository
- quality: 73/100 (new)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.github.grupoanesthy-spec%2Fagent-transaction-trust
- tools: https://api.protogrid.dev/v1/servers/io.github.grupoanesthy-spec%2Fagent-transaction-trust/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "agent-transaction-trust": {
      "type": "http",
      "url": "https://json-repair-api-9ybv.onrender.com/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 100
- freshness: 100
- provenance: 35
- drivers: +reachable +uptime-100% +updated-4d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 73/100 (new)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 71 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- fail `tools.annotations`: no tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: verify_settlement (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); clearance_x402_ap2 (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); verify_trust_token (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); …
- pass `tools.token_cost`: about 1,905 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: n/a (weight 15)

- n/a `stability.changes`, `stability.rug_pull`: tool history recorded for 4 of the 7 days needed

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 6, about 1,905 tokens to load them all
- tool set hash: 9542fb7fc1fb19344a1d24fabc017091
- tools last changed: 2026-10-19T17:44:16.590Z
- badge: [![protogrid quality](https://protogrid.dev/badge/io.github.grupoanesthy-spec/agent-transaction-trust.svg)](https://protogrid.dev/servers/io.github.grupoanesthy-spec/agent-transaction-trust)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-19 `clearance_x402_ap2` added
  - Paid transaction-clearance decision for an autonomous x402 purchase. Use after create_ap2_challenge and after receiving the merchant's real PAYMENT-REQUIRED challenge, but before paying the merchant. Verifies AP2 v0.2 authority, exact request/challenge integrity, and public merchant-risk evidence. Returns clearance_decision APPROVED, REVIEW or DENIED and a signed clearance_token. APPROVED may proceed automatically; REVIEW should not auto-pay; DENIED should not pay. Machine price: $0.001 via x402.
- 2026-10-19 `verify_settlement` changed (description, inputSchema)
  - before: Free post-payment step. Call only after the merchant x402 payment for a previously approved authorization. Verifies the Base USDC settlement on-chain and, when it matches the authorization, returns a signed settlement receipt. The authorization token comes from authorize_x402_ap2; payment_response is the merchant x402 PAYMENT-RESPONSE when available. No additional Trust fee is charged.
  - after: Free post-payment step. Call only after the merchant x402 payment for a previously approved authorization or transaction clearance. Verifies the Base USDC settlement on-chain and, when it matches the authorization, returns a signed settlement receipt. The authorization_token may come from clearance_x402_ap2 or authorize_x402_ap2; payment_response is the merchant x402 PAYMENT-RESPONSE when available. No additional Trust fee is charged.
- 2026-10-19 `verify_trust_token` changed (description, inputSchema)
  - before: Free, read-only token check. Use this to validate the signature and expiry of a Trust policy, authorization token, or settlement receipt; it does not perform on-chain settlement verification.
  - after: Free, read-only token check. Use this to validate the signature and expiry of a Trust policy, authorization token, transaction clearance token, or settlement receipt; it does not perform on-chain settlement verification.
- 2026-10-19 `create_ap2_challenge` changed (description)
  - before: Free prerequisite for AP2-native authorization. Call before authorize_x402_ap2, bind the returned challenge into the AP2 Payment Mandate proof, then pass that challenge token as ap2_authority.challenge_token. The challenge is short-lived and intended for one authorization flow.
  - after: Free prerequisite for AP2-native transaction clearance or authorization. Call before clearance_x402_ap2 or authorize_x402_ap2, bind the returned challenge into the AP2 Payment Mandate proof, then pass that challenge token as ap2_authority.challenge_token. The challenge is short-lived and intended for one purchase flow.
- 2026-10-19 `get_trust_manifest` changed (description)
  - before: Free, read-only entry point. Call this first when deciding whether Agent Transaction Trust fits an x402 purchase. Returns capabilities, supported authority modes, proof key, price/network information, and the endpoints needed for authorization and settlement verification.
  - after: Free, read-only entry point. Call this first when deciding whether Agent Transaction Trust fits an x402 purchase. Returns capabilities, supported authority modes, proof key, price/network information, and the endpoints needed for transaction clearance, authorization, and settlement verification.
- 2026-10-18 `authorize_x402_ap2` changed (description, inputSchema) **meaning changed**
  - before: Verify AP2 authority and authorize a live x402 purchase. Machine price: $0.001 via x402. A denied authorization is not settled/charged.
  - after: Paid pre-payment trust gate. Use after create_ap2_challenge and after receiving the merchant's real x402 PAYMENT-REQUIRED challenge, but before paying the merchant. Verifies AP2 v0.2 authority and binds approval to the exact merchant challenge and HTTP request. On approval returns authorization_token; next pay the merchant, then call verify_settlement. Machine price: $0.001 via x402. If authorization is denied, the Trust fee is not settled/charged.
- 2026-10-18 `verify_settlement` changed (description, inputSchema) **meaning changed**
  - before: Verify the authorized Base USDC settlement on-chain and issue a signed settlement receipt. This tool does not charge an additional Trust fee.
  - after: Free post-payment step. Call only after the merchant x402 payment for a previously approved authorization. Verifies the Base USDC settlement on-chain and, when it matches the authorization, returns a signed settlement receipt. The authorization token comes from authorize_x402_ap2; payment_response is the merchant x402 PAYMENT-RESPONSE when available. No additional Trust fee is charged.
- 2026-10-18 `verify_trust_token` changed (description, inputSchema) **meaning changed**
  - before: Verify the signature and expiry of an Agent Transaction Trust policy, authorization, or settlement receipt.
  - after: Free, read-only token check. Use this to validate the signature and expiry of a Trust policy, authorization token, or settlement receipt; it does not perform on-chain settlement verification.
- 2026-10-18 `create_ap2_challenge` changed (description, inputSchema) **meaning changed**
  - before: Create the short-lived audience/nonce challenge required for AP2-native authorization.
  - after: Free prerequisite for AP2-native authorization. Call before authorize_x402_ap2, bind the returned challenge into the AP2 Payment Mandate proof, then pass that challenge token as ap2_authority.challenge_token. The challenge is short-lived and intended for one authorization flow.
- 2026-10-18 `get_trust_manifest` changed (description) **meaning changed**
  - before: Read Agent Transaction Trust capabilities, proof key, supported authority modes, and endpoints.
  - after: Free, read-only entry point. Call this first when deciding whether Agent Transaction Trust fits an x402 purchase. Returns capabilities, supported authority modes, proof key, price/network information, and the endpoints needed for authorization and settlement verification.

Full history: https://api.protogrid.dev/v1/servers/io.github.grupoanesthy-spec%2Fagent-transaction-trust/changes

## Remotes

- https://json-repair-api-9ybv.onrender.com/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

_none_

## Tools (6)

- `authorize_x402_ap2`: Paid pre-payment trust gate. Use after create_ap2_challenge and after receiving the merchant's real x402 PAYMENT-REQUIRED challenge, but before paying the merchant. Verifies AP2 v0.2 authority and binds approval to the exact merchant challenge and HTTP request. On approval returns authorization_token; next pay the merchant, then call verify_settlement. Machine price: $0.001 via x402. If authorization is denied, the Trust fee is not settled/charged.
- `clearance_x402_ap2`: Paid transaction-clearance decision for an autonomous x402 purchase. Use after create_ap2_challenge and after receiving the merchant's real PAYMENT-REQUIRED challenge, but before paying the merchant. Verifies AP2 v0.2 authority, exact request/challenge integrity, and public merchant-risk evidence. Returns clearance_decision APPROVED, REVIEW or DENIED and a signed clearance_token. APPROVED may proceed automatically; REVIEW should not auto-pay; DENIED should not pay. Machine price: $0.001 via x402.
- `create_ap2_challenge`: Free prerequisite for AP2-native transaction clearance or authorization. Call before clearance_x402_ap2 or authorize_x402_ap2, bind the returned challenge into the AP2 Payment Mandate proof, then pass that challenge token as ap2_authority.challenge_token. The challenge is short-lived and intended for one purchase flow.
- `get_trust_manifest`: Free, read-only entry point. Call this first when deciding whether Agent Transaction Trust fits an x402 purchase. Returns capabilities, supported authority modes, proof key, price/network information, and the endpoints needed for transaction clearance, authorization, and settlement verification.
- `verify_settlement`: Free post-payment step. Call only after the merchant x402 payment for a previously approved authorization or transaction clearance. Verifies the Base USDC settlement on-chain and, when it matches the authorization, returns a signed settlement receipt. The authorization_token may come from clearance_x402_ap2 or authorize_x402_ap2; payment_response is the merchant x402 PAYMENT-RESPONSE when available. No additional Trust fee is charged.
- `verify_trust_token`: Free, read-only token check. Use this to validate the signature and expiry of a Trust policy, authorization token, transaction clearance token, or settlement receipt; it does not perform on-chain settlement verification.