MCP Queen — Find MCP Servers and Inspect Operational Evidence

# MCP Queen — the evidence layer for MCP > Search MCP servers by observed evidence, not promises. Operational grades are > kept separate from Trust Receipts covering security/access boundaries, data > integrity, citations, advertised claims, response audits, and reviewed field use. ## For agents - MCP endpoint (streamable HTTP, no auth): https://mcpqueen.com/mcp Tools: search_servers (find graded servers by task/category — the discovery broker), search_tools (search the actual tool names/descriptions servers expose — find a specific capability or data type), list_grades, get_server_grade, get_trust_receipt, search_trust_evidence, submit_feedback (field reports, quarantined for human review). - Grades API (JSON, CORS-open): https://mcpqueen.com/api/grades.json - Per-server Trust Receipt API: https://mcpqueen.com/api/trust/<registry-name>.json - Integration guides and runnable examples: https://mcpqueen.com/integrations OpenAI, Claude, LangChain, LlamaIndex, Cloudflare Agents, and Hugging Face. - Architecture and trust boundaries: https://mcpqueen.com/architecture - Prepared demo chapters, transcript slots, and captions: https://mcpqueen.com/demo (footage is not yet published). ## For humans - Dashboard (sort/filter/search, categories): https://mcpqueen.com/registry - Per-server evidence pages: https://mcpqueen.com/s/<registry-name> - Reviewed real-usage field reports: https://mcpqueen.com/field-reports - Methodology: https://mcpqueen.com/registry#methodology - Architecture: https://mcpqueen.com/architecture ## For server owners - Live grade badge: https://mcpqueen.com/badge/<registry-name>.svg - Grades refresh automatically (~3-day full probe cycle). Fix what the evidence shows and the badge updates itself. Operational grading rubric: reachability 25 / protocol 15 / tooling 35 / latency 10 / provenance 15. Auth-gated servers are scored on the verifiable subset and marked provisional. Separately, safe read-only response audits test call usab