MCP QUEEN
io.github.polygraphso/litmus A
Grade MCP servers A to F with the open behavioral litmus. npm: full toolset; hosted: lookups only.
Dev & Codev0.35.0streamable-httppolygraph.so repository
Grade evidence — probed 2026-07-19 04:45 UTC
| Criterion | Points | Observed |
|---|---|---|
| reachability | 25 / 25 | HTTP 200, initialize accepted in 246ms |
| protocol | 15 / 15 | valid JSON-RPC initialize result, protocolVersion 2025-06-18, serverInfo polygraph@1.0.0 |
| tooling | 35 / 35 | tools/list OK: 3 tools e.g. "check_server"; 3/3 described, 3/3 fully-typed schemas, median description 320 chars |
| latency | 10 / 10 | initialize round-trip 246ms |
| provenance | 15 / 15 | description present; repository linked; version 0.35.0; namespace io.github.polygraphso matches endpoint/repo |
Score 100/100 · latency 246ms · 3 tools · protocol access: open ⓘ
Trust receipt
Security, data integrity, citation quality, and advertised claims are measured separately from protocol uptime. Missing evidence is marked unverified, never converted into a pass.
No deterministic trust observations published yet. This means unaudited—not safe, unsafe, accurate, or inaccurate.
Machine-readable receipt: /api/trust/io.github.polygraphso/litmus.json
Connect your agent
Claude Code:
claude mcp add --transport http litmus https://polygraph.so/api/mcp
Generic MCP client config:
{ "mcpServers": { "litmus": { "type": "http", "url": "https://polygraph.so/api/mcp" } } }
MCP Queen is a graded index, not a middleman — your agent connects directly to the server above. Check the grade and evidence first; that's the point.
Share this server: permalink https://mcpqueen.com/s/io.github.polygraphso/litmus · referral link https://mcpqueen.com/go/io.github.polygraphso/litmus (counts as “routed via the queen”).
Own this server? Embed your grade badge
Live operational-grade badge, re-probed continuously — not a security or data-quality certification. Put it in your README and link to the complete receipt:
[](https://mcpqueen.com/s/io.github.polygraphso/litmus)
Think the grade is wrong? Fix the finding the evidence shows, then the next probe cycle picks it up automatically (full cycle ≈ 3 days) — or open a dispute via the MCP endpoint.
Queen Watch
Email alerts when the grade changes or the endpoint stops answering. Double-opt-in, one-click unwatch, free while in beta.
Probe history
| When (UTC) | Grade | Score | Latency |
|---|---|---|---|
| 2026-07-19 04:45 | A | 100 | 246ms |