Conformance MCP Server

by modelcontextprotocol

A framework for testing MCP (Model Context Protocol) client and server implementations against the specification.

136Node.jsstdio

context tax

pending

security

pending

cold start

pending

freshness

pending

Our reading of Conformance, from the data

Conformance is a testing & qa MCP server from modelcontextprotocol.

We haven't measured its tool list yet, so its token cost is unknown.

With 136 GitHub stars it ranks #30 of 419 testing & qa servers we index.

It runs locally on your machine over stdio.

Install Conformance MCP server

claude mcp add conformance -- npx -y @modelcontextprotocol/conformance

{
  "mcpServers": {
    "conformance": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/conformance"
      ]
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "conformance": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/conformance"
      ]
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "conformance": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/conformance"
      ]
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "conformance": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/conformance"
      ]
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Freshness

Not enough public signals yet to judge maintenance.

Last commit (default branch)
2026-10-01 · 17d ago · GitHub
Latest release
2026-03-27 · 7mo ago · GitHub · v0.1.16
Package published
no data · npm/PyPI
Registry entry updated
no data · official registry

How it compares in Testing & QA

Against the most-starred testing & qa servers we index. Token cost is per model turn, measured from each server's live tool list.

Server	Stars	Tools	Tokens / turn	Freshness	Runs
Conformance (this)	136	—	not measured	—	local
Browser	39,318	—	not measured	Active	local + hosted
Playwright	38,349	—	not measured	Active	local
Keploy	18,643	—	not measured	Active	hosted
SeleniumBase	13,091	—	not measured	Active	local
e2e	11,249	—	not measured	—	local

All testing & qa MCP servers

FAQ

›How do I install the Conformance MCP server in Claude Code?

Run: claude mcp add conformance -- npx -y @modelcontextprotocol/conformance. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Conformance require an API key?

No required environment variables are declared in its published metadata.

›Can I use Conformance as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Conformance in the official MCP registry?

No. It was indexed from npm.

Sources and method

GitHub repository: fetched 2026-10-19
Package registry (npm / PyPI): listed
Last checked against all sources: 2026-10-19

The description, packages and links come from the maintainer's own published metadata. Token cost, security signals, freshness and the reading above are MCPSkillHub's own measurements; see the methodology. Spot an error? Request a correction or claim the listing.