How to transition from the legacy setup of Polar’s MCP integration used with Claude — for installs prior to September 12, 2025 — to the updated version. It walks through what needs to be done for different account types (free or paid), how to properly remove the old MCP configuration, and then outlines the steps to install the new, up-to-date MCP server.
For users who installed the MCP before 12 September 2025.
1. If using a Free Claude Plan, save the API key
This step is only necessary if you’re using the free Claude plan, or want to use n8n.
Claude Pro will use oAuth to connect instead.
Open your Config file in a text editor:
Save the API key somewhere
Save a copy of the API key, you’ll need it later (just the part between the quotes):
2. Delete the old MCP server
In Claude, go to Settings > Developer > Local MCP servers
And press the delete button next to polar-mcp .
Confirm the deletion.
Restart Claude.
3. Install the new MCP
Follow these instructions to install the latest version:
Find instructions for other platforms here:
By following the steps in this guide — saving your API key if needed, deleting the old MCP server, and installing the new one — you’ll ensure the transition is clean and your Polar-Claude integration remains functional and secure going forward.