Polarmcp MCP Server

What the code does

We read the source, 22 h ago · rules 3dff92dd89df

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 child = spawn(command, args, { detached: true, stdio: "ignore" });

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 polarmcp -- npx -y polar-mcp-unofficial

{
  "mcpServers": {
    "polarmcp": {
      "args": [
        "-y",
        "polar-mcp-unofficial"
      ],
      "command": "npx"
    }
  }
}

[mcp_servers.polarmcp]
command = "npx"
args = ["-y", "polar-mcp-unofficial"]

{
  "mcpServers": {
    "polarmcp": {
      "args": [
        "-y",
        "polar-mcp-unofficial"
      ],
      "command": "npx"
    }
  }
}

{
  "mcpServers": {
    "polarmcp": {
      "args": [
        "-y",
        "polar-mcp-unofficial"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: POLAR_CLIENT_ID (Polar OAuth client ID. Optional when configured with polar-mcp-server setup.), POLAR_CLIENT_SECRET (Polar OAuth client secret. Prefer polar-mcp-server setup so this secret is stored in ~/.polar-mcp/config.json instead of MCP client config.), POLAR_REDIRECT_URI (Redirect URI configured in the Polar AccessLink admin. Optional when configured with polar-mcp-server setup.), POLAR_TOKEN_PATH (Optional local path for OAuth tokens. Defaults to ~/.polar-mcp/tokens.json.), POLAR_PRIVACY_MODE (Optional payload mode: summary, structured, or raw. Defaults to structured. raw means full Polar AccessLink payloads for supported endpoints.), POLAR_CACHE (Optional SQLite cache toggle. Set to true or sqlite to enable.), POLAR_CACHE_PATH (Optional local SQLite cache path. Defaults to ~/.polar-mcp/cache.sqlite.), POLAR_NO_CACHE (Set to true to bypass the in-memory HTTP response cache (60s TTL for GET only). POST/PUT/DELETE and 4xx/5xx responses are never cached regardless.). The author declared them in the registry entry; get the values from the project itself.