cirrux

Connect ChatGPT to Cirrux

Add Cirrux as a plugin in ChatGPT and it can read and organize your mail, write drafts and manage your calendar for you. You set it up once on chatgpt.com.

You’ll need this server URL in step 2:

https://mcp.cirrux.co/mcp

Steps

1

Open Plugins in ChatGPT

Go to chatgpt.com and open Plugins in the sidebar. Click Add in the top right and choose Add custom MCP server.

The Plugins page in ChatGPT with the Add menu open and Add custom MCP server highlighted
2

Add Cirrux as a custom MCP server

Fill in:

  • Name: Cirrux
  • Connection: keep Server URL selected and paste https://mcp.cirrux.co/mcp
  • Authentication: OAuth. You can skip the advanced OAuth settings.

Tick I understand and want to continue and click Create as a plugin.

The Add custom MCP server dialog in ChatGPT, with Cirrux as the name, the Cirrux MCP URL as the server URL and OAuth as authentication
3

Sign in to Cirrux and approve

ChatGPT sends you to Cirrux to sign in.

Select the workspace you want to connect and check the permissions. Mail and Calendar are on by default; open the dropdown next to either to grant only part of it, such as reading mail without sending. Then click Authorize.

The Cirrux sign-in page asking to approve access for ChatGPT by chatgpt.com, with a workspace picker and Mail and Calendar permissions

That’s it. Back in ChatGPT, ask something like “Which meetings do I have tomorrow, and who is invited?”

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