Connect Codex to Tandem

Codex adds Tandem as a remote MCP server and signs in through your browser.

Steps

1. Add the server, then sign in. Codex opens a browser window for you to choose a workspace.

Terminal

codex mcp add tandem --url https://api.tandemcrm.app/mcp
codex mcp login tandem

How it signs in

Codex signs in with OAuth: it registers itself with Tandem, opens your browser, and you sign in, choose a workspace and approve what it may do (read, suggest, write, delete). It gets crm:read and crm:write unless you approve less. Disconnect it any time under Agents in Tandem.

Try it

Ask Codex: "Which Tandem workspace are you connected to, and what can you do there?" Then try "Add acme.com to Tandem with the details from its website."

See the tools reference for everything Codex can do, and permissions for what each scope allows.