AI Plugin Index
Conformance
Verified · npm:@modelcontextprotocolMCP server by modelcontextprotocol · updated · ★ 136 · 59k downloads a week
A framework for testing MCP (Model Context Protocol) client and server implementations against the specification. Conformance is published by npm:@modelcontextprotocol from its verified domain in the official MCP Registry.
Last commit 2 days ago
No licence found, so reuse rights are unclear
Clear description, published package or server URL, 136 stars, original repository
Not checked yet. What we check
Install Conformance
Built from the published package, never by AIclaude mcp add conformance -- npx -y @modelcontextprotocol/conformanceRun in your terminal. Add --scope user to use it in every project.
{
"mcpServers": {
"conformance": {
"command": "npx",
"args": [
"-y",
"@modelcontextprotocol/conformance"
]
}
}
}Settings, Developer, Edit config. Paste into claude_desktop_config.json and restart.
{
"mcpServers": {
"conformance": {
"command": "npx",
"args": [
"-y",
"@modelcontextprotocol/conformance"
]
}
}
}Add to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project).
{
"servers": {
"conformance": {
"command": "npx",
"args": [
"-y",
"@modelcontextprotocol/conformance"
]
}
}
}Add to .vscode/mcp.json. VS Code uses "servers", not "mcpServers".
codex mcp add conformance -- npx -y @modelcontextprotocol/conformance{
"mcpServers": {
"conformance": {
"command": "npx",
"args": [
"-y",
"@modelcontextprotocol/conformance"
]
}
}
}Add to ~/.gemini/config/mcp_config.json (all projects) or .agents/mcp_config.json (this project).
gemini mcp add conformance npx -y @modelcontextprotocol/conformanceGemini CLI was replaced by Antigravity CLI in June 2026 and remains only for enterprise licences and paid API keys.
MCP servers run with your permissions and can read what you give them access to. Some need an API key: check the README and add it under env in the conformance block.
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Conformance: common questions
How do I install Conformance?
In Claude Code run claude mcp add conformance -- npx -y @modelcontextprotocol/conformance. For Claude Desktop, Cursor and VS Code, paste the config shown above and restart. See the install guides.
Is Conformance the official server?
Conformance is published by npm:@modelcontextprotocol from its verified domain in the official MCP Registry.
Is Conformance free?
The code is published under the NOASSERTION licence. The service it connects to may have its own pricing.
Is Conformance safe to use?
It scores 88 of 100. Grades: maintenance A, licence F, quality B. The security check has not run for it yet. Review the code before you install. How grades work.
What are alternatives to Conformance?
Similar MCP servers: mockserver, XcodeBuildMCP, Repowise, SmartBear MCP.
Does Conformance work with ChatGPT?
Not directly. It runs locally, and ChatGPT only connects to remote servers with a URL. Use it in Claude Code, Claude Desktop, Cursor, VS Code or Codex.