Litmus MCP Server

@polygraphso

Basic information

About Litmus MCP Server

Behavioral litmus harness for MCP servers — the open @polygraphso/litmus package (CLI, library, MCP server).

Litmus MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "litmus": {
      "command": "npx",
      "args": [
        "-y",
        "-p",
        "@polygraphso/litmus",
        "polygraphso-litmus",
        "litmus",
        "npm/@modelcontextprotocol/server-filesystem"
      ]
    }
  }
}

Litmus MCP Server tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

Fetch the live tool list by running this server in a temporary sandbox using the button above.

Overview

What is Litmus?

Behavioral litmus harness for MCP servers — the open @polygraphso/litmus package (CLI, library, MCP server).

How to use Litmus?

The README includes setup instructions such as # -p is required: the package ships three bins, so npx must be told which to run.

Key features of Litmus

check_server — read a server's published grade in under a second (no execution); the
run_litmus — grade a server now: the full harness, grade + evidence returned to the agent
run_skill_litmus — grade a Claude Code / Agent Skill (static scan, A/B/D/F)
verify_attestation — read the onchain proof behind a published grade (EAS on Base)
uses: actions/checkout@v5

Use cases of Litmus

Connect an MCP-compatible client to this repository's service.
Review the README-backed setup before enabling it in production.

Frequently asked questions

Where is the source code for Litmus?

The source code is linked from the repository URL on this page.

Does Litmus include a standard MCP config?

If the README contains a parseable MCP configuration block, it is shown in the Config tab.

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