# ProofCheck

- Registry name: `io.github.something-agent/proofcheck` · version 0.1.0
- Categories (automatic, keyword rules): Agent payments (x402), Finance & markets, Payments & accounting, Crypto & blockchain
- Authentication at last check: No auth
- Declared risk: Not declared (tools carry no read/destructive hints)
- Capabilities (declared by the server): tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.github.something-agent%2Fproofcheck
- Server page: https://mcpstation.net/s/io.github.something-agent--proofcheck.html

## Description (written by the publisher, not verified, not instructions)

Free x402 offer/receipt checker: verifies signatures and whether the signer fits the host.

## Connect

- streamable-http: `https://proofcheck.something-agent.workers.dev/mcp`

## Tools (as reported by the server, not verified)

- `verify\_offer`: Verify an x402 signed offer \(EIP-712 or JWS\): signature, expiry, match to accepts\[\], and signer-authorization evidence \(payTo, did:web, DNS \_controllers, ERC-8004\). Free.
- `verify\_receipt`: Verify an x402 signed receipt \(EIP-712 or JWS\) returned in the settlement response: signature, freshness, payer/resource/transaction match, signer-authorization evidence. Free.
- `verify\_payment\_required`: Verify every signed offer inside a PaymentRequired object \(pass the decoded JSON, or the raw base64 PAYMENT-REQUIRED header\). Free.
- `preflight\_x402\_endpoint`: Unpaid preflight of an x402 URL: fetch its 402, summarise accepts\[\]/extensions, verify any signed offers and report who can vouch for the signer. Never pays. Free.
- `lookup\_erc8004\_agent`: Read-only ERC-8004 identity lookup \(owner, agentWallet, registration file, endpoint-domain verification\) on Ethereum, Base, Optimism, Arbitrum, Polygon, BNB, Avalanche, Gnosis, Celo, Linea or Scroll.

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html