MCP Queen

com.mcpqueenPublished by mcpqueen.comOfficial publisherv0.3.0Updated Nov 2, 2026

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

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingDeveloper ToolsSecurity & Monitoring

Overview

AI-generated overview

MCP Queen is a public discovery and evidence service that lets an assistant search MCP servers and their tools, and read operational grades and Trust Receipts…

What you can do
  • Search MCP servers by natural-language task, with filters for auth, latency, category and operational grade
  • Search the actual tools exposed by graded servers, by capability or data type
  • List top graded servers and fetch one server's grade with verbatim probe evidence
  • Read a server's Trust Receipt and search published trust evidence and reviewed field reports
  • Submit a field report about a server you have used, which goes to a quarantined review queue
When to use it
Useful when choosing which MCP server to connect and you want dated, evidence-backed observations about its tools, reliability, auth and access caveats rather than marketing claims. Also handy for checking whether a server exposes a specific capability before installing it.
Requirements
A remote Streamable HTTP endpoint at mcpqueen.com/mcp; no account is required for rate-limited evaluation. An optional zero-dependency local stdio bridge (Node.js, or Docker) is available for clients that cannot reach a remote HTTP endpoint, and can be pointed elsewhere with MCPQUEEN_MCP_URL.
Before you install
An operational grade is not a security, privacy, data-quality or compliance certification, and missing evidence means unaudited rather than safe. submit_feedback writes to a review queue, so avoid sending sensitive details; agent examples deliberately exclude it from automatic model access. Queries and feedback go to a third-party hosted service.

Installation

In SourceWeft

  1. Open MCP Queen in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.mcpqueen%2Fregistry/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "queen": {
      "type": "http",
      "url": "https://mcpqueen.com/mcp"
    }
  }
}

README

MCP Queen

MCP Queen is a public discovery and evidence service for Model Context Protocol servers. It publishes dated operational observations, tool metadata, and separate Trust Receipts so developers and agents can inspect evidence before deciding what to connect.

An MCP Queen operational grade is not a security, privacy, data-quality, or compliance certification. Missing evidence is unaudited, not safe.

Use the hosted endpoint

The public Streamable HTTP endpoint requires no account for rate-limited evaluation:

text
https://mcpqueen.com/mcp

It exposes six read-only discovery/evidence tools and one additive feedback tool:

  • search_servers
  • search_tools
  • list_grades
  • get_server_grade
  • get_trust_receipt
  • search_trust_evidence
  • submit_feedback — writes only to a quarantined review queue

For human-readable setup and current service limits, use mcpqueen.com/connect.

Claude Code

bash
claude mcp add --transport http mcpqueen https://mcpqueen.com/mcp

Direct protocol examples

The model-free examples under examples/clients call the hosted endpoint directly:

bash
node examples/clients/node-http.mjs "GitHub issue triage"

The Python version uses the official MCP SDK. Additional examples show bounded integration with LangChain, LlamaIndex, Cloudflare Agents, Hugging Face, and the OpenAI Responses API. Agent examples allowlist only the six read-only tools; submit_feedback is excluded from automatic model access.

Optional local stdio bridge

This repository contains a small zero-dependency stdio bridge for clients that cannot connect to a remote Streamable HTTP endpoint directly. The bridge does not contain MCP Queen's hosted implementation or evidence corpus; it forwards JSON-RPC messages to https://mcpqueen.com/mcp.

bash
git clone https://github.com/mcpqueen/mcpqueen.gitcd mcpqueennpm cinpm start

To point the bridge at another compatible endpoint during local testing, set MCPQUEEN_MCP_URL in the process environment.

Docker is also supported:

bash
docker build -t mcpqueen-bridge .docker run --rm -i mcpqueen-bridge

What this public repository contains

The production Worker, deployment configuration, evidence database, submission packages, operational records, and private source history are not part of this public developer surface. This repository is not a production deployment source.

Verify locally

bash
npm cinpm test

The tests exercise the bridge against a local mock endpoint and verify that public documentation and package scripts reference files that are actually in this repository.

License and support

Code in this repository is available under the MIT License. Product documentation, privacy, terms, and support are available from mcpqueen.com.

Source: README.md at commit 51168b7

Tools

7

search_servers

Search MCP 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.

Parametersauthlimitqueryrequiredcategoryminimum_grademax_latency_ms

search_tools

Search MCP 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 directly.

Parametersauthlimitqueryrequiredcategoryminimum_grademax_latency_ms

list_grades

List Operational 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.

Parameterslimit

get_server_grade

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').

Parametersnamerequired

get_trust_receipt

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.

Parametersnamerequired

search_trust_evidence

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.

Parameterslimitqueryrequiredstatusdimension

submit_feedback

Submit Field Report

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.

Parametersreportrequiredagent_nameserver_namerequired

Version history

1
  1. v0.3.0LatestSep 16, 2026

Score

100% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts