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Litmus

Verified Integration
Author: @polygraphso•Category: ServerApplication
GitHub Repository
JSON-RPC 2.0
Protocol Standard
Sub-second
Execution Latency
Active
Operational Status
Tags:#Claude#Search#API#Python#Git#AI#GitHub#Node.js#Docker

Client Configuration

— Connect Litmus to Claude Desktop or Cursor in seconds
{
  "mcpServers": {
    "litmus-1": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-litmus-1"
      ],
      "env": {}
    }
  }
}
Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).
Architecture & Capabilities

System Overview

Evaluates the behavioral security and functionality of MCP servers by fingerprinting their tool surface and running a comprehensive suite of probes.

Indexed Date

7/23/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for Litmus

Litmus connects to an MCP server like an agent, fingerprints its exact tool surface, and then runs four categories of behavioral probes: tool-output injection, permission/egress (in a secure Docker sandbox), sensitive-data handling, and adversarial-input handling.

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