How to connect Google Calendar to Codex

1. 1. Enable Google Calendar in Metorial

   In your Metorial portal, enable the Google Calendar MCP server and sign in with the account that owns the data. Access stays governed by your team policies.

2. 2. Add the server and sign in

   The Codex CLI, IDE extension and ChatGPT desktop app share this config.

   Copy

   codex mcp add metorial --url <your-magic-mcp-url>
   codex mcp login metorial

3. 3. Check the connection

   Type /mcp in Codex to see Metorial and its Google Calendar tools.

• Get Event: Retrieve the full details of a specific event by its ID, including attendees, recurrence, conference data, and all metadata.
• Manage Calendar: Create, update, or delete a secondary calendar.
• Delete Event: Permanently delete an event from a Google Calendar.
• Update Event: Update an existing Google Calendar event.
• Get Colors: Retrieve the available calendar and event color definitions used in Google Calendar.
• Find Free/Busy: Query the free/busy availability for one or more calendars over a given time range.
• List Events: List events from a Google Calendar with flexible filtering options.
• List Calendars: List all calendars on the user's calendar list, including their primary calendar, subscribed calendars, and shared calendars.
• Manage Sharing: Manage access control (sharing permissions) on a calendar.
• Create Event: Create a new event on a Google Calendar.
• Quick Add Event: Create an event using natural language text, just like the "Quick Add" feature in the Google Calendar UI.
• Respond to Event: Accept, decline, or tentatively accept a Google Calendar invitation without replacing the event's attendee list.
• Get Settings: Retrieve one Google Calendar user setting or list the settings explicitly stored for the authenticated user.
• Batch Modify Events: Create, update, or delete multiple Google Calendar events in one tool call.
• List Calendar Sharing: List the sharing rules for a Google Calendar, including each rule's access role and user, group, domain, or public scope.
• And 1 more on the Google Calendar MCP server page.

• Limit which Google Calendar tools Codex sees with enabled_tools and disabled_tools on the metorial server in config.toml.
• Set default_tools_approval_mode to auto, prompt, writes or approve. writes prompts only for tools that are not marked read-only.
• Type /mcp in the composer to see the connected servers.
• Override the approval behavior for a single Google Calendar tool with tools.<tool>.approval_mode.

Metorial is listed but tools are missing

Codex can connect without credentials and then see nothing. Run codex mcp login metorial to complete the OAuth sign-in.

Metorial times out at startup

Codex waits 10 seconds by default. Raise startup_timeout_sec under [mcp_servers.metorial] in ~/.codex/config.toml.

Long tool calls fail after a minute

The default tool timeout is 60 seconds. Raise tool_timeout_sec for the metorial server in config.toml.

Based on the Codex MCP documentation.