io.github.polygraphso/litmus
io.github.polygraphso/litmus
Grade MCP servers A to F with the open behavioral litmus. npm: full toolset; hosted: lookups only.
timeout probed 2026-10-15 · HTTP 200
probe timed out after 15000 ms
- Endpoint
- https://polygraph.so/api/mcp (streamable-http)
- Host
- polygraph.so
- Repository
- https://github.com/polygraphso/litmus
- Website
- https://polygraph.so
- Registry
- active, updated 2026-07-20 · registry entry
- Reachable
- 4 of the last 6 probes
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 15:26 | alive | 982 ms | 3 | 928 | 537 |
| 2026-10-05 00:43 | alive | 2.5 s | 3 | 537 | |
| 2026-10-04 10:06 | alive | 1.9 s | 3 | 537 | |
| 2026-10-04 08:00 | alive | 1.3 s | 3 | 537 | |
| 2026-10-03 20:39 | error | ||||
| 2026-10-03 17:54 | error |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.polygraphso/litmus)
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.