Connect Claude

Last updated 2026-08-16

Claude connects to FM Fathom the way you'd want it to: paste one URL, sign in, done. No key to copy and nothing to paste into a config file.

What you need

An FM Fathom account with access to the client you want to connect
A Claude account (claude.ai on the web, or the Claude Desktop app)

Connect

In FM Fathom, open Connect to AI (bottom of the sidebar) and switch to the MCP Connections tab.
Find the client you want and copy its connector URL. It looks like https://fathom.fmfathom.com/mcp/c/your-client.
In Claude, open Settings, then Connectors, then Add custom connector.
Paste the URL. Leave the advanced settings (OAuth client ID and secret) empty; FM Fathom registers itself automatically.
When Claude asks you to authorize, sign in with your FM Fathom account and approve.
Ask something real: *"What are the five biggest tables in this solution?"*

One connector per solution

Each connector is scoped to a single client, and everything it can do is read-only. To work with more than one solution, add a separate connector for each; that way Claude always knows exactly which solution it's looking at, and a conversation can never blur two clients together.

Managing connections

The MCP Connections tab shows your connected apps, and each has a Disconnect that revokes its access immediately. Disconnect anything you don't recognize or no longer use.

Claude Desktop with a static key (the old way)

Before sign-in connect, Claude Desktop setup used a downloadable extension file plus an access key. It still works and is kept for existing installs: download the extension for your client from the same tab, open it with Claude Desktop, and paste an access key when asked. New setups should use the sign-in path above instead.