# MCP Queen — the graded MCP registry

> Every remote server in the official MCP registry, probed live over streamable
> HTTP and graded deterministically with verbatim evidence. No stars, no votes,
> no pay-to-rank — probes only.

## For agents
- MCP endpoint (streamable HTTP, no auth): https://mcpqueen.com/mcp
  Tools: search_servers (find graded servers by task/category — the discovery
  broker), list_grades, get_server_grade, submit_feedback (field reports,
  quarantined for human review).
- Grades API (JSON, CORS-open): https://mcpqueen.com/api/grades.json

## For humans
- Dashboard (sort/filter/search, categories): https://mcpqueen.com/registry
- Per-server evidence pages: https://mcpqueen.com/s/<registry-name>
- Methodology: https://mcpqueen.com/registry#methodology

## 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.

Grading rubric: reachability 25 / protocol 15 / tooling 35 / latency 10 /
provenance 15. Auth-gated servers are scored on the verifiable subset and
marked provisional. By the team behind constat.dev and healthai.com.