io.github.Fizzl13/x402-doctor

up checked 2026-11-10T22:37:46.970Z

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Publisher-provided title

x402 Doctor

Publisher-provided description

Is this x402/MPP API safe to pay? $0.001 preflight, fixes, a $0.25 test purchase. Free quick check.

Summary by lookupd

Preflight-checks x402/MPP paid API endpoints, diagnoses and fixes payment issues, verifies receipts and agent identity via a registry.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http x402-doctor https://x402-doctor.fizzl.eu/mcp

Codex, remote (streamable-http)

codex mcp add x402-doctor --url https://x402-doctor.fizzl.eu/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "x402-doctor": {
      "url": "https://x402-doctor.fizzl.eu/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (15 tools)

Publisher-provided text

• x402_quick_check Free: does this x402 endpoint work for a paying agent? Returns pass, warn or fail with the number of problems and the top three. Limited to 10 calls per hour. F
• x402_payee_check Free: is every payTo of this x402 endpoint really its seller's? Per payment option, one outcome of the draft ERC "x402 Payee Verification for ERC-8004 Agents":
• check_payment_proof Free: after paying an x402 endpoint, pass the PAYMENT-RESPONSE header it returned (X-PAYMENT-RESPONSE in v1). Returns the transaction, network and payer it name
• concordium_badge_check Free: look up an agent in Concordium's Agent Registry (CIS-8004) by its badge, the CIS-2 token address an Agent Card carries, or by the longer Agent ID that Con
• x402_trust_record Free: the daily track record of a paid x402 or MPP endpoint from the x402 Trust Index: on how many of the last 30 scanned days an agent could pay it, the latest
• x402_trust_add Free: add your own paid endpoint to the x402 Trust Index when no registry lists it yet (CDP Bazaar, Circle's Agent Marketplace, GoPlausible, XRPL AI Hub, nohuma
• verify_receipt Free: check the signed receipt that every paid x402 Doctor answer carries (diagnose, preflight, batch, deep, fix, delivery check; HTTP or MCP), for example to p
• x402_diagnose Paid ($0.01 via x402 in USDC on Base, Solana, Monad, Polygon, Arbitrum, Avalanche, Algorand or Stellar, or in RLUSD on the XRP Ledger): diagnose an x402 endpoin
• x402_preflight Paid ($0.001 via x402 in USDC on Base, Solana, Monad, Polygon, Arbitrum, Avalanche, Algorand or Stellar, or in RLUSD on the XRP Ledger): call this before your a
• x402_fix Paid ($0.05 via x402 in USDC on Base, Solana, Monad, Polygon, Arbitrum, Avalanche, Algorand or Stellar, or in RLUSD on the XRP Ledger): diagnoses your x402 endp
• x402_preflight_batch Paid ($0.005 via x402 in USDC on Base, Solana, Monad, Polygon, Arbitrum, Avalanche, Algorand or Stellar, or in RLUSD on the XRP Ledger): the pre-payment check f
• x402_preflight_deep Paid ($0.01 via x402 in USDC on Base, Solana, Monad, Polygon, Arbitrum, Avalanche, Algorand or Stellar, or in RLUSD on the XRP Ledger): for expensive calls. The
• x402_delivery_check Paid ($0.25 via x402 in USDC on Base, Solana, Monad, Polygon, Arbitrum, Avalanche, Algorand or Stellar, or in RLUSD on the XRP Ledger): not a reading but a purc
• x402_delivery_status Free: the status of a delivery check ordered with x402_delivery_check (or GET /api/v1/delivery-check): awaiting_payment, queued or done, and once done the resul
• feedback Report a bug, a missing feature or anything else about this service, in a structured way. Free. A person reads every report; nothing is run or changed automatic

Details

• Version: 1.0.3
• Transports: streamable-http
• Uptime (7 days): 100%
• Median latency: 619 ms
• First indexed: 2026-11-01T09:09:31.738Z
• Last seen in registry: 2026-11-01T09:09:31.882Z
• Repository: https://github.com/Fizzl13/x402-doctor
• Website: https://x402-doctor.fizzl.eu

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• Last crawl: 2026-11-11T17:38:11.606Z
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