com.twelvepermissions/x402-doctor
x402 Doctor
Diagnose x402 seller endpoints: what is wrong with your 402 challenge, and how to fix it.
alive probed 2026-10-05 · HTTP 200
3tools
495tokens in Claude Opus 5.5
528tokens in Claude Code
0.2 %of a 200k context window
287o200k_base estimate
125 msto initialize
53 msto list tools
- Endpoint
- https://x402-doctor.tsharpe.workers.dev/mcp (streamable-http)
- Host
- x402-doctor.tsharpe.workers.dev
- Protocol
- 2024-11-05
- Reports itself as
- x402-doctor 1.0.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/tsharpe2282-web/twelve-permissions
- Website
- https://x402-doctor.tsharpe.workers.dev
- Registry
- active, updated 2026-08-17 · registry entry
- Reachable
- 5 of the last 5 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| probe_x402_endpoint | 168 | 59 % |
| explain_defect | 75 | 26 % |
| list_checks | 44 | 15 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-05 00:22 | alive | 125 ms | 3 | 495 | 287 |
| 2026-10-04 09:59 | alive | 269 ms | 3 | 287 | |
| 2026-10-04 07:52 | alive | 333 ms | 3 | 287 | |
| 2026-10-03 20:32 | alive | 231 ms | 3 | 287 | |
| 2026-10-03 17:50 | alive | 641 ms | 3 | 287 |
Badge and feed
[](https://mcpcost.ulehla.dev/s/com.twelvepermissions/x402-doctor)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.