# ReceiptRail

> Read-only on-chain receipt check for x402 payments; confirm settlement before trusting a tx.

- name: io.github.xka0085-byte/receiptrail
- version: 0.3.0
- connection class: R0 (autonomous)
- trust: 97/100
- quality: 73/100 (needs work)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.github.xka0085-byte%2Freceiptrail
- tools: https://api.protogrid.dev/v1/servers/io.github.xka0085-byte%2Freceiptrail/tools

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

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "receiptrail": {
      "type": "http",
      "url": "https://agenttoll-receipts.app.workbuddy.host/mcp"
    }
  }
}
```


## Trust

- hygiene: 100
- liveness: 100
- freshness: 100
- provenance: 90
- drivers: +repository +namespace-matches-repo +website +reachable +uptime-99% +updated-21d-ago
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 73/100 (needs work)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-06-18; 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: issue_receipt (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); verify_receipt (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_receipt (readOnlyHint, destructiveHint, idempotentHint, openWorldHint)
- pass `tools.token_cost`: about 499 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 75 (weight 15)

- warn `stability.changes`: 8 tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

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

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

- tools: 3, about 499 tokens to load them all
- tool set hash: 2568fbbc83f8e400acaa4b8c279d3e7c
- tools last changed: 2026-10-15T10:23:47.929Z
- badge: [![protogrid quality](https://protogrid.dev/badge/io.github.xka0085-byte/receiptrail.svg)](https://protogrid.dev/servers/io.github.xka0085-byte/receiptrail)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-15 `verify_x402_receipt` removed
  - Verify a signed receipt in the official x402 offer-receipt extension format (docs.x402.org/extensions/offer-receipt, npm @x402/extensions). Accepts {format:"jws", signature} artifacts (JWS with EdDSA/Ed25519 or ES256/P-256), checks structure, required payload fields (version/network/resourceUrl/payer/issuedAt), cryptographic signature, optional freshness window, and optional expected values. Public key resolves automatically from did:key/did:web/did:jwk kid, or pass public_key_jwk directly. Read-only, no cost.
- 2026-09-28 `verify_x402_receipt` added
  - Verify a signed receipt in the official x402 offer-receipt extension format (docs.x402.org/extensions/offer-receipt, npm @x402/extensions). Accepts {format:"jws", signature} artifacts (JWS with EdDSA/Ed25519 or ES256/P-256), checks structure, required payload fields (version/network/resourceUrl/payer/issuedAt), cryptographic signature, optional freshness window, and optional expected values. Public key resolves automatically from did:key/did:web/did:jwk kid, or pass public_key_jwk directly. Read-only, no cost.
- 2026-09-26 `get_receipt` added
  - Fetch full receipt details: digests, checks, outcome, amount, buyer, seller, timestamp, PDA. Look up by receipt_id, or by x402_payment_ref (always works — the receipt lives on-chain). Read-only, no cost.
- 2026-09-26 `verify_receipt` added
  - Verify an AgentToll receipt against live Solana state: PDA owner must be the AgentToll program and the stored digest must match the receipt. Look up by receipt_id, or by x402_payment_ref (always works — the receipt lives on-chain). Read-only, no cost.
- 2026-09-26 `issue_receipt` added
  - Anchor a SHA-256 digest of delivered content plus the x402 settlement reference on Solana. Returns a permanent, publicly verifiable receipt (poll until outcome === "settled"). Costs 0.001 USDC via x402; if x402_payment_signature is omitted, returns the payment challenge instead (pay 0.001 USDC to the service address, then call again with the payment tx signature).
- 2026-09-26 `verify_receipt` removed
  - Verify an AgentToll receipt against live Solana state: PDA owner must be the AgentToll program and the stored digest must match the receipt. Look up by receipt_id, or by x402_payment_ref (always works — the receipt lives on-chain). Read-only, no cost.
- 2026-09-26 `get_receipt` removed
  - Fetch full receipt details: digests, checks, outcome, amount, buyer, seller, timestamp, PDA. Look up by receipt_id, or by x402_payment_ref (always works — the receipt lives on-chain). Read-only, no cost.
- 2026-09-26 `issue_receipt` removed
  - Anchor a SHA-256 digest of delivered content plus the x402 settlement reference on Solana. Returns a permanent, publicly verifiable receipt (poll until outcome === "settled"). Costs 0.001 USDC via x402; if x402_payment_signature is omitted, returns the payment challenge instead (pay 0.001 USDC to the service address, then call again with the payment tx signature).

Full history: https://api.protogrid.dev/v1/servers/io.github.xka0085-byte%2Freceiptrail/changes

## Remotes

- https://agenttoll-receipts.app.workbuddy.host/mcp (streamable-http, auth none, reachable true, uptime30d 0.9918033)

## Packages

_none_

## Tools (3)

- `get_receipt`: Fetch full receipt details: digests, checks, outcome, amount, buyer, seller, timestamp, PDA. Look up by receipt_id, or by x402_payment_ref (always works — the receipt lives on-chain). Read-only, no cost.
- `issue_receipt`: Anchor a SHA-256 digest of delivered content plus the x402 settlement reference on Solana. Returns a permanent, publicly verifiable receipt (poll until outcome === "settled"). Costs 0.001 USDC via x402; if x402_payment_signature is omitted, returns the payment challenge instead (pay 0.001 USDC to the service address, then call again with the payment tx signature).
- `verify_receipt`: Verify an AgentToll receipt against live Solana state: PDA owner must be the AgentToll program and the stored digest must match the receipt. Look up by receipt_id, or by x402_payment_ref (always works — the receipt lives on-chain). Read-only, no cost.