LangWatch 🏰 MCP Server

The LangWatch MCP Server makes your AI coding assistant an expert in both LangWatch, for automatically instrumenting your code, managing versioned prompts and creating evaluations; and Scenario, for automatically testing your agents via simulations.

Setup in your Coding Assistant 👩‍💻

1. Open Cursor/Claude Code/your editor Settings
2. Navigate to the MCP settings
3. Set the "name" as "LangWatch"
4. Add the LangWatch MCP:

{
  "mcpServers": {
    "langwatch": {
      "command": "npx",
      "args": ["-y", "@langwatch/mcp-server"]
    }
  }
}

Tools

The MCP Server provides the following tools:

fetch_langwatch_docs

• Description: Fetches the LangWatch docs for understanding how to implement LangWatch in your codebase.
• Parameters:
  • url: (Optional) The full url of the specific doc page. If not provided, the docs index will be fetched.

fetch_scenario_docs

• Description: Fetches Scenario docs for understanding how to write agent simulations to test the agents on your codebase.
• Parameters:
  • url: (Optional) The full url of the specific doc page. If not provided, the docs index will be fetched.

Example Usage

Ask your coding assistant to instrument your code:

"Can you instrument my LLM code with LangWatch"

Or ask it to write a scenario test:

"Can you implement a scenario test for my agent?"

🛟 Support

If you have questions or need help, join our community:

• Discord Community
• LangWatch Docs
• Email Support