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Is litmus reliable?

Reliable (measured) Yes. Faceabot measured litmus 7 times: 100% of checks succeeded, including the last 7 in a row (last check 2026-10-19 16:10 UTC). It also does the job: its real read-only task worked 7 of 7 times.

Last check: 2026-10-19 16:10 UTC · answered in 11746 ms · remote (no install)

En français : Fiable (mesuré). Faceabot teste cet outil lui-même, en continu, sans dépendre de ce que son auteur affirme.

What it does

Grade MCP servers A to F with the open behavioral litmus. npm: full toolset; hosted: lookups only.

Source: official MCP registry (registry.modelcontextprotocol.io) · version 0.36.0 · publisher website
Connect your agent
{
  "mcpServers": {
    "litmus": {
      "url": "https://polygraph.so/api/mcp"
    }
  }
}
Or ask Faceabot first: MCP tool check_reliability {"id":"io.github.polygraphso/litmus"} on https://faceabot.com/api/mcp.
Does it actually do the job?

Does the job (tested) — Faceabot asked list_servers to do a small read-only task 7 time(s): 7 returned a real result, the last 7 in a row. Last result: ok in 3476 ms.

Sample input: {}. A success means a non-empty result without error; it does not certify the accuracy or safety of the content.
Faceabot measurements
WhenAnswersReal taskLatency
2026-10-19 16:10 UTC✅ ok✅ done11746 ms
2026-10-19 01:20 UTC✅ ok✅ done8315 ms
2026-10-18 09:55 UTC✅ ok✅ done9003 ms
2026-10-18 01:45 UTC✅ ok✅ done9998 ms
2026-10-17 17:35 UTC✅ ok✅ done10280 ms
2026-10-17 09:25 UTC✅ ok✅ done9572 ms
2026-10-17 01:25 UTC✅ ok✅ done9506 ms
Method: MCP initialize then tools/list from Faceabot (FaceabotProbe/1.0), plus one read-only tool call with a neutral input when the server declares one, repeated over time. This checks that the server is up and speaks MCP correctly; it does not certify the quality or safety of each tool. How measurement works.

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Publisher of litmus?

Show your measured reliability on your README or website:

Faceabot reliability badge for litmus

[![Measured by Faceabot](https://faceabot.com/badge/io.github.polygraphso/litmus.svg)](https://faceabot.com/tools/io.github.polygraphso/litmus)
Data in JSON: /api/catalog?id=io.github.polygraphso/litmus · Stop probes: POST /api/reliability/opt-out

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