MCP Queen

Measured conclusion: Alive, not deep-tested. L2 outcome: not_attempted.

The evidence layer for MCP: live operational grades plus Trust Receipts for every registry server.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "MCP Queen": {
      "url": "https://mcpqueen.com/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (7)

• search_servers read-only

  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.

  Parameters:

  • query (required) — string — Keyword or task to search name/title/description for
  • auth — string — Filter by authentication state (default any)
  • limit — number — Max results (default 10, max 25)
  • category — string — Optional category filter: Dev & Code, Data & Databases, Web & Search, AI & Agents, Finance & Crypto, Communication, Productivity, Security, Commerce, Media & Design, Cloud & Infra, Science & Health, Other
  • minimum_grade — string — Worst acceptable live grade
  • max_latency_ms — number — Maximum measured initialize latency in milliseconds

  Hints: read-only yes · destructive no · idempotent not declared · open-world no

• search_tools read-only

  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 directly.

  Parameters:

  • query (required) — string — Capability, data type, or keyword to match against tool names and descriptions
  • auth — string — Filter by authentication state (default any)
  • limit — number — Max matching tools (default 15, max 40)
  • category — string — Optional server-category filter: Dev & Code, Data & Databases, Web & Search, AI & Agents, Finance & Crypto, Communication, Productivity, Security, Commerce, Media & Design, Cloud & Infra, Science & Health, Other
  • minimum_grade — string — Worst acceptable live server grade
  • max_latency_ms — number — Maximum measured initialize latency in milliseconds

  Hints: read-only yes · destructive no · idempotent not declared · open-world no

• list_grades read-only

  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.

  Parameters:

  • limit — number — Max servers to return (default 25, max 100)

  Hints: read-only yes · destructive no · idempotent not declared · open-world no

• get_server_grade read-only

  Get the full grade and verbatim probe evidence for one MCP server, by its official registry name (e.g. 'com.healthai/radar').

  Parameters:

  • name (required) — string — Registry server name

  Hints: read-only yes · destructive no · idempotent not declared · open-world no

• get_trust_receipt read-only

  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.

  Parameters:

  • name (required) — string — Official registry server name

  Hints: read-only yes · destructive no · idempotent not declared · open-world no

• search_trust_evidence read-only

  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.

  Parameters:

  • query (required) — string — Evidence, claim, source, capability, caveat, or server keyword
  • limit — number — Max evidence items (default 20, max 50)
  • status — string
  • dimension — string

  Hints: read-only yes · destructive no · idempotent not declared · open-world no

• 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.

  Parameters:

  • server_name (required) — string — Official registry name of the server the report is about
  • report (required) — string — The field report, 20-2000 chars, specific and factual
  • agent_name — string — Optional: which agent/client is reporting

  Hints: read-only no · destructive no · idempotent not declared · open-world no

Publisher website Repository

Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.