ProofCheck

Connect Remote server

claude mcp add --transport http proofcheck https://proofcheck.something-agent.workers.dev/mcp

{
  "mcpServers": {
    "proofcheck": {
      "url": "https://proofcheck.something-agent.workers.dev/mcp"
    }
  }
}

{
  "servers": {
    "proofcheck": {
      "type": "http",
      "url": "https://proofcheck.something-agent.workers.dev/mcp"
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://proofcheck.something-agent.workers.dev/mcp

Tools 5 found in our last check

• 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.

Details

More finance and crypto servers See all

• RightCard

  Which of your credit cards to use at any store, from verified bank data. No bank login.

• Africa Compliance Data

  African holidays, business days, VAT, withholding tax, tax treaties, tax IDs and filing deadlines

• BusCalc Business Calculators

  Business calculators, data lookups, replayable receipts, and documentation for enterprise pilots.

• CarLoanMath

  US car loan math: monthly payment, compare loans, max price for your budget, amortization. Free.

• InfinityVolume

  Dollar volume across 13 stock markets and US sectors, against each one's own normal. No prices.

• xytara MCP Executor

  Pay-per-call MCP tools and signed on-chain attestations: 20 free/day, then x402 or a spend key.