x402 Doctor
Diagnose x402 seller endpoints: what is wrong with your 402 challenge, and how to fix it.
| Endpoint | https://x402-doctor.tsharpe.workers.dev/mcp (streamable-http) |
|---|---|
| Registry version | 1.0.0 |
| Now | 3 tools · grade A (99) · pin ts_2957669cd8acf69aa24dce1687148ceb · protocol 2024-11-05 |
| First / last listed | 2026-10-26 02:11 UTC / 2026-10-26 02:11 UTC |
| Grade over time | 2026-10-26: A (99), 3 tools |
Is this your server? Own a server? ToolFit hosted watch re-checks it every 24 h ($0.25 per 30 days) or 6 h ($0.60) and sends you an HMAC-signed webhook when its tools or grade change: POST https://api.youraitools.co/toolfit/v1/watch. To opt out, see About & opt-out.
Tools: probe_x402_endpoint explain_defect list_checks
probe_x402_endpoint | Probe an x402 seller endpoint and report what it observes about it. Performs the handshake a paying client would: GET with no X-PAYMENT header, then checks the 402 challenge against 16 rules. Every finding says whether the rule comes from the x402 spec or from an observed facilitator rejection. Reports status "healthy" (nothing to report), "advisories" (only warn/info findings — the endpoint works params: url* |
explain_defect | Full explanation of one rule by id — what it checks, why it matters, how to fix it, and where the rule came from. Use when you want the reasoning without re-probing. params: id* |
list_checks | The whole rule table. Knowing what was NOT checked is part of knowing what a clean result means. params: none |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.