x402 endpoint doctor: grades a paid route A-F unpaid, with paste-ready fixes. By Crypto Money Maker
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First seen 22 Oct 2026. One server, whatever directories list it: each directory listing keeps its own page and history.
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Tools
| Tool | Description | Behaviour |
|---|---|---|
| check_x402_endpoint | x402 endpoint doctor: probes a paid x402 URL unpaid (never pays) and grades it A-F: 402 on GET / HEAD / empty POST, CORS, v2 PAYMENT-REQUIRED header and v1 body, accepts (USDC asset, EIP-712 domain, Solana feePayer, amounts, payTo), multichain consistency and the Bazaar declaration. Free preview tier: grade, score, status and counts. The paid x402 endpoints /v1/lite ($0.005), /v1/check ($0.02, adds the CDP validate verdict, payee checks and generated fixes) and /v1/site ($0.05, whole origin) return the fix list. | Read-only |
| Directory | Listing | Tier | First seen |
|---|---|---|---|
| Official MCP Registry | x402fix | - | 22 Oct 2026 |