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x402 Doctor

x402-doctor.fizzl.eu · x402

Why is my x402 endpoint broken? Diagnose and debug an x402 payment endpoint (or MCP server) when payments fail: checks the 402 challenge, accepts[] (network, payTo, amount, asset), resource URL, Solana settlement readiness, which wallets and agents can pay, Bazaar/OpenAPI discovery and the browser paywall. Returns every check with a fix hint. Read-only: never pays. Bulk: 1000 credits for $0.80 via /api/v1/credits.
Name and description as published by x402 Bazaar

Live

Last successful check: 26 Oct 2026, 05:57 UTC.

answered, last 24 hours
100%
answered, last 30 days
100%
How addrbook checks →

Connect

https://x402-doctor.fizzl.eu/api/v1/diagnose

x402: an unpaid request gets a 402 with the price and pay-to wallet. addrbook never pays.

Who's behind it

Listed by
  • x402 Bazaarlast seen UTC
Wallets named
  • 0x6b0f4651ed42893ab58139938175e4a69f175f25named by x402 Bazaar
Listed since

Payments

different wallets paid it, last 30 days
5
paid calls, last 30 days
6
last paid call (UTC)

As the x402 Bazaar reports, from payments Coinbase's facilitator settled. Read . addrbook has not counted these payments itself.

Its x402 endpoints have not listed a payment option addrbook could read yet.

Checks by endpoint

HostProtocolStateLast checked (UTC)Last answered (UTC)24 hours30 daysTools
x402-doctor.fizzl.eux402Live100%100%—

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