litmus
Grade MCP servers A to F with the open behavioral litmus.
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What it can do
What data it sees
Do you need an account
No: the server works without sign-in
Grade MCP servers A to F with the open behavioral litmus. npm: full toolset; hosted: lookups only.
Server tool list (3)
Raw names from tools/list. Only developers need these.
| check_server | Read a server's published behavioral grade (A-F) from polygraph.so in under a second; no execution. The pre-flight check before recommending or installing an MCP server. On a miss it returns not_available (unevaluated: neither safe nor unsafe) with next steps. |
| list_servers | Servers with a published polygraph grade, sorted A-first then by ref. Returns up to `limit` rows starting at `offset` (default limit 25, capped at 100 per call); `grade` restricts to one letter. `summary` always covers the full graded corpus (a total plus a count per grade), regardless of `grade`, `limit`, or `offset`. |
| request_grade | Hosted grading is discontinued. This tool returns gone. Existing published grades remain available via check_server / list_servers. To grade a server yourself, run the open harness: npx -y -p @polygraphso/litmus polygraphso-litmus litmus <server_ref>. |