MCP Server

io.github.spanlens/mcp-server MCP Server

Name: io.github.spanlens/mcp-server MCP Server
Author: io.github.spanlens

io.github.spanlens/mcp-server

Repository Registry

What is the io.github.spanlens/mcp-server MCP server?

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

How to install io.github.spanlens/mcp-server

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

SPANLENS_API_KEY
required
secret
Spanlens 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_URL
Override the API endpoint for self-hosted Spanlens. Default: https://server.spanlens.io

Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@spanlens/mcp-server"
      ],
      "env": {
        "SPANLENS_API_KEY": "<YOUR_SPANLENS_API_KEY>",
        "SPANLENS_BASE_URL": "<YOUR_SPANLENS_BASE_URL>"
      }
    }
  }
}

Cursor

~/.cursor/mcp.json

{
  "mcpServers": {
    "mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@spanlens/mcp-server"
      ],
      "env": {
        "SPANLENS_API_KEY": "<YOUR_SPANLENS_API_KEY>",
        "SPANLENS_BASE_URL": "<YOUR_SPANLENS_BASE_URL>"
      }
    }
  }
}

Windsurf

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@spanlens/mcp-server"
      ],
      "env": {
        "SPANLENS_API_KEY": "<YOUR_SPANLENS_API_KEY>",
        "SPANLENS_BASE_URL": "<YOUR_SPANLENS_BASE_URL>"
      }
    }
  }
}

VS Code

.vscode/mcp.json

{
  "servers": {
    "mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@spanlens/mcp-server"
      ],
      "env": {
        "SPANLENS_API_KEY": "<YOUR_SPANLENS_API_KEY>",
        "SPANLENS_BASE_URL": "<YOUR_SPANLENS_BASE_URL>"
      }
    }
  }
}

Claude Code

claude mcp add mcp-server --env SPANLENS_API_KEY=<YOUR_SPANLENS_API_KEY> --env SPANLENS_BASE_URL=<YOUR_SPANLENS_BASE_URL> -- npx -y @spanlens/mcp-server