Connect Cal.com to Codex

To use Cal.com in Codex, connect your Cal.com account in Manyplug and add Manyplug to Codex once. Codex then gets 5 Cal.com tools, for example: “Event types”, “Bookings”, and “Get a booking”. It takes about 4 minutes and works on the free plan.

Connect Cal.com Free plan, no card

1. Connect Cal.com in Manyplug

Click “Connect Cal.com” and paste the key or app password into Manyplug’s form:

Your Cal.com API key. Takes under a minute.

Open Cal.com → Settings → Developer → API keys and click New.Open Cal.com API keys
Name it Manyplug, pick an expiry and copy the key (cal_…).
Paste the key into the form.

The AI cancels a meeting only after you confirm: attendees get an email.

2. Add Manyplug to Codex

Codex CLI and the IDE extension.

Add the server to ~/.codex/config.toml.

[mcp_servers.manyplug]
url = "https://manyplug.com/mcp"

Run codex mcp login manyplug and sign in in the browser.

Full guide: Codex

3. Ask Codex

Which meetings are booked in Cal.com this week?
Who is booked tomorrow, and what about?
Confirm all bookings that wait for my approval.

What Codex can do in Cal.com

Each action can be turned off per account, and changes can wait for your OK.

Action	Access
Event types Event types and booking links.	Reads
Bookings Meetings by status and period.	Reads
Get a booking Attendees, location and answers.	Reads
Cancel Cancels a meeting and notifies attendees.	Risky
Confirm Confirms a pending booking.	Makes changes

Questions

Can I connect two Cal.com accounts to Codex?

Yes. Connect each one in Manyplug under its own name, for example Work and Personal. Codex can use one of them or all at once.

Will Codex change anything in Cal.com without asking?

By default these actions wait for your approval before they run: “Cancel”. Other changes follow your rules, which you can make stricter per account.

Do I need an official Cal.com MCP server for this?

No. Manyplug connects to Cal.com itself with a key or app password you paste into its form, and gives Codex the tools through one MCP address, together with your other services.

Is it free to connect Codex to Manyplug?

Yes. New workspaces get 14 days of Pro free, then the free plan keeps going with 150 actions a month and up to 3 connected accounts. No card needed. Paid plans start at $5 a month.

Does Codex see my passwords or API keys?

No. Keys are entered on Manyplug’s own pages, stored encrypted with a separate key per account, and the AI only receives tool results.

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