How do I install litmus?

Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.

No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.

How is the trust score calculated?

This listing scores 50 (Fair). The formula is published on the methodology page.

MCPpedia

litmus MCP Server — Install for Claude, Cursor & VS Code | MCPpedia

litmus MCP Server

Name: litmus MCP Server
Author: polygraphso

Grade MCP servers A to F with the open behavioral litmus. npm: full toolset; hosted: lookups only.

Tools Versions Alternatives

RegistryRemotepolygraphso

50Fair

Install

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "polygraphso-litmus": {
      "command": "npx",
      "args": [
        "-y",
        "@polygraphso/litmus@0.36.0"
      ],
      "env": {
        "POLYGRAPH_API_URL": "https://polygraph.so",
        "NEXT_PUBLIC_POLYGRAPH_NETWORK": "base"
      }
    }
  }
}

Install guide

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Environment

Name	Required	Notes
POLYGRAPH_API_URL	No	Base URL for published-grade lookups (check_server, list_servers, request_grade) and attestation resolution.
NEXT_PUBLIC_POLYGRAPH_NETWORK	No	Which network to read attestations from: 'base' (mainnet, default) or 'base-sepolia' (testnet).

litmus MCP Server

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