Tracelane MCP Server

What the code does

We read the source, 1 d ago · rules ccca72095570

Things with no honest explanation: a promise that contradicts the code, code that runs at install time while hiding what it does, data leaving the machine.

    const r = spawnSync(command, [...args], { cwd, stdio: "inherit" });

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

    const r = spawnSync(command, [...args], { cwd, stdio: "inherit" });

        return __import__(module)

USER root
# aws-lc-rs / ring (via rustls + jsonwebtoken's aws_lc_rs feature) compile C -> cmake.

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add tracelane-mcp -- npx -y @tracelanedev/mcp

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

[mcp_servers.tracelane-mcp]
command = "npx"
args = ["-y", "@tracelanedev/mcp"]

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

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

This one needs environment variables set before it will start: TRACELANE_API_KEY (Tracelane API key (tlane_…). Resolved to a tenant once at startup via the gateway's /v1/auth/whoami; the server refuses to start if the key is rejected. Also the credential used to read trace data through the gateway when CLICKHOUSE_URL is unset.), TRACELANE_GATEWAY_URL (Base URL of the Tracelane gateway. Validates TRACELANE_API_KEY, and — when CLICKHOUSE_URL is unset — is where every trace read goes. Must be https://…tracelane.dev outside development.), CLICKHOUSE_URL (self-host only; when unset the server reads through the gateway. Set this to point the server at your own ClickHouse instead of Tracelane Cloud.), CLICKHOUSE_USER (ClickHouse username.), CLICKHOUSE_PASSWORD (ClickHouse password.), CLICKHOUSE_DB (ClickHouse database holding the spans table.), TRACELANE_MCP_TRANSPORT (Transport to serve. stdio (default) for desktop clients; http for the Streamable HTTP transport.). The author declared them in the registry entry; get the values from the project itself.