MCP

Setup

Get your API key

Go to your project settings in the Lemma dashboard and copy your API key.

Copy your key immediately after creating it — you won’t be able to see it again.

Add to your IDE

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Claude Desktop
Claude Code
Other

In Settings > MCP Servers, add:

{
  "mcpServers": {
    "lemma": {
      "url": "https://api.uselemma.ai/mcp",
      "headers": {
        "Authorization": "Bearer <your-api-key>"
      }
    }
  }
}

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "lemma": {
      "type": "http",
      "url": "https://api.uselemma.ai/mcp",
      "headers": {
        "Authorization": "Bearer <your-api-key>"
      }
    }
  }
}

Restart Claude Desktop after saving.

Run this in your terminal:

claude mcp add --transport http lemma \
  https://api.uselemma.ai/mcp \
  --header "Authorization: Bearer <your-api-key>"

For any MCP client that supports Streamable HTTP transport:

{
  "mcpServers": {
    "lemma": {
      "url": "https://api.uselemma.ai/mcp",
      "headers": {
        "Authorization": "Bearer <your-api-key>"
      }
    }
  }
}

Replace <your-api-key> with the key from your project settings.

Try it out

Ask your agent:

Use Lemma to show me my last 5 traces, including any errors.

See the API Reference for the full list of available tools and endpoints.

Getting Started

Instrumentation

Integrations

Connections

Prerequisites

Setup

​Prerequisites

​Setup

Prerequisites

Setup