io.github.spanlens/mcp-server

io.github.spanlens/mcp-server

Query Spanlens LLM observability from Cursor, Claude Desktop, or Continue via MCP.

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Connect this server

Add this to your MCP client config — claude_desktop_config.json (Claude Desktop) or .cursor/mcp.json (Cursor).Suits: Claude Desktop · Cursor.

{
  "mcpServers": {
    "mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@spanlens/mcp-server@0.3.0"
      ],
      "env": {
        "SPANLENS_API_KEY": "<your SPANLENS_API_KEY>",
        "SPANLENS_BASE_URL": "https://api.spanlens.io"
      }
    }
  }
}
Environment variables
  • SPANLENS_API_KEYrequiredsecretSpanlens API key. Must be a scope=public key (sl_live_pub_*) issued from the Public Keys card at https://spanlens.io/projects — the server refuses to start with a full-access sl_live_* key.
  • SPANLENS_BASE_URLOverride the API endpoint for self-hosted Spanlens. Default: https://api.spanlens.io

A starting point — check the repository for exact arguments and setup. Restart your client after editing the config.

Category
Developer Tools
Version
0.3.0
Registry
active
Published
9/28/2026

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