MCP Queen
The evidence layer for MCP: live operational grades plus Trust Receipts for every registry server.
| Endpoint | https://mcpqueen.com/mcp (streamable-http) |
|---|---|
| Registry version | 0.3.0 |
| Now | 7 tools · grade A (98) · pin ts_fdb40eb6bfd99fd2af185fb6c5c32c2b · protocol 2025-06-18 |
| First / last listed | 2026-10-28 03:47 UTC / 2026-10-28 03:47 UTC |
| Grade over time | 2026-10-28: A (98), 7 tools |
Is this your server? Own a server? ToolFit hosted watch re-checks it every 24 h ($0.25 per 30 days) or 6 h ($0.60) and sends you an HMAC-signed webhook when its tools or grade change: POST https://api.youraitools.co/toolfit/v1/watch. To opt out, see About & opt-out.
Tools: search_servers search_tools list_grades get_server_grade get_trust_receipt search_trust_evidence submit_feedback
search_servers | Search the MCP evidence registry using a natural multi-word task (e.g. 'reliable no-auth drug interaction server with citations'). Tokenizes and expands common synonyms, ranks metadata plus observed tool descriptions, and supports operational-grade/auth/latency/category filters. Use get_trust_receipt or search_trust_evidence for security, data, citation, claim, and response evidence. params: query*, category, minimum_grade, auth, max_latency_ms, limit |
search_tools | Search across the actual tools that graded MCP servers expose (their tool names and descriptions, captured live from tools/list) — not just server metadata. Use this when you need a specific capability or data type, e.g. 'get weather', 'query postgres', 'device recall', 'FDA 510k'. Returns the matching tools with the server that offers each, its grade, and the remote endpoint so you can connect di params: query*, category, minimum_grade, auth, max_latency_ms, limit |
list_grades | List the top graded MCP servers from the mcpqueen registry (deterministic probe grades with evidence). Returns grade, score 0-100, latency, tool count and auth state per server. params: limit |
get_server_grade | Get the full grade and verbatim probe evidence for one MCP server, by its official registry name (e.g. 'com.healthai/radar'). params: name* |
get_trust_receipt | Get one MCP server's complete evidence receipt: operational grade, deterministic security/data-integrity/citation/claim observations, and reviewed real-usage field reports. Missing observations are explicitly unaudited, never treated as a pass. params: name* |
search_trust_evidence | Search published MCP trust evidence and reviewed real-usage field reports. Use for questions such as which servers expose citations, have access caveats, make unverifiable corpus claims, or show security concerns. Returns verbatim observations with dates and source type, not a synthetic trust score. params: query*, dimension, status, limit |
submit_feedback | Submit a field report about an MCP server you have actually used (what worked, what failed, surprising behavior). Reports are quarantined for human review and never auto-published. params: server_name*, report*, agent_name |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.