How to integrate Google Calendar MCP with Antigravity

Connect Antigravity to Google Calendar MCP. Create a meeting with the marketing team, list all events scheduled for next week, and more using natural language, with authentication handled for you.

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Google Calendar

Oauth2

Google Calendar is a time management service for scheduling meetings, events, and reminders. It streamlines personal and team organization with integrated notifications and sharing options.

47 Tools7 Triggers

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How to integrate Google Calendar MCP with Antigravity

Antigravity IDE is Google's agentic IDE, built on a VS Code-style editor and powered by models like Gemini 3.5 Flash, Gemini 3.1 Pro, Opus 4.6, and more. It treats the AI agent as a first-class teammate, planning, coding, and validating work through an Agent Manager dashboard with deep browser connectivity.

In this guide, I will explain the easiest and most secure way to connect your Google Calendar account to Antigravity IDE via Composio Connect, so it can create a meeting with the marketing team, list all events scheduled for next week, delete tomorrow’s canceled event from your calendar, and more without ever putting your account credentials at risk.

Also integrate Google Calendar with

Why use Composio?

Composio provides:

Access to 1,500+ managed apps from a single MCP endpoint. This makes it convenient for agents to run cross-app workflows.
Programmatic tool calling. Allows LLMs to write code in a remote workbench to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
Large tool response handling outside the LLM context. This minimizes context bloat from large tool responses.
Dynamic just-in-time access to thousands of tools across hundreds of apps. Composio loads the tools your agent needs, so LLMs are not overwhelmed by tools they do not need.

Connect Google Calendar to Antigravity

Antigravity does not ship with one-click custom MCP install links yet, so configuration goes through the IDE's raw config file. The process takes under a minute.

1. Open the MCP Config

Go to Antigravity Settings, open the Customizations tab, then click Open MCP Config to open mcp_config.json in the editor.

Antigravity Customizations settings with Open MCP Config button

2. Get your API key

Go to the Composio Dashboard and copy your API key.

Composio Dashboard showing where to get the API key

3. Add Composio to `mcp_config.json`

Paste the following configuration into the file:

bash

{
  "mcpServers": {
    "remote-composio": {
      "serverUrl": "https://connect.composio.dev/mcp",
      "headers": {
        "x-consumer-api-key": "your-composio-api-key"
      }
    }
  }
}

Note: Antigravity uses serverUrl, not url, for remote HTTP-based MCP servers. This differs from the url key used in Cursor and VS Code configs.

Save the file and click refresh in the Installed MCP Servers section.

Antigravity showing Composio tools after MCP setup

Connect your Google Calendar account

Back in the Antigravity agent panel, ask the agent to connect to Google Calendar or give it any Google Calendar-related task.

For example, ask it to:

"Create a meeting with the marketing team"
"List all events scheduled for next week"
"Delete tomorrow’s canceled event from your calendar"

It will prompt you to authenticate and authorize access to Google Calendar.

That is it. Composio tools are now available in Antigravity, and your Google Calendar account is ready to use.

Conclusion

You have successfully connected Google Calendar to Antigravity using Composio Connect. Your agent can now use Google Calendar securely without exposing credentials in prompts or local scripts.

TOOLS & TRIGGERS

Supported Tools and Triggers

Every Google Calendar action and event your agent gets out of the box.

Delete ACL Rule

Deletes an access control rule from a Google Calendar.

Get ACL Rule

Retrieves a specific access control rule for a calendar.

Create ACL Rule

Creates an access control rule for a calendar.

List ACL Rules

Retrieves the list of access control rules (ACLs) for a specified calendar, providing the necessary 'rule_id' values required for updating specific ACL rules.

Patch ACL Rule

Updates an existing access control rule for a calendar using patch semantics (partial update).

Update ACL Rule

Updates an access control rule for the specified calendar.

Watch ACL Changes

Tool to watch for changes to ACL resources.

Batch Events

Execute up to 1000 event mutations (create/patch/delete) in one Google Calendar HTTP batch request with per-item status/results.

Remove Calendar from List

Tool to remove a calendar from the user's calendar list.

Get Single Calendar by ID

Retrieves metadata for a SINGLE specific calendar from the user's calendar list by its calendar ID.

Insert Calendar into List

Inserts an existing calendar into the user's calendar list, making it visible in the UI.

Patch Calendar List Entry

Updates an existing calendar on the user's calendar list using patch semantics.

Update Calendar List Entry

Updates a calendar list entry's display/subscription settings (color, visibility, reminders, selection) for the authenticated user — does not modify the underlying calendar resource (title, timezone, etc.

Watch Calendar List

Watch for changes to CalendarList resources using push notifications.

Delete Calendar

Deletes a secondary calendar that you own or have delete permissions on.

Update Calendar

Full PUT-style update that overwrites all calendar metadata fields; unspecified optional fields are cleared.

Stop Channel

Tool to stop watching resources through a notification channel.

Clear Calendar

Clears a primary calendar by deleting all events from it.

Get Color Definitions

Returns the color definitions for calendars and events.

Create a new calendar

Creates a new secondary Google Calendar with the specified title and optional settings.

Create Event

Creates a timed event using start_datetime and either end_datetime or duration fields, or an all-day event using an inclusive start_date and exclusive end_date.

Delete event

Deletes an event from the specified calendar.

Create a calendar

Creates a new, empty Google Calendar with the specified title (summary).

Get Event

Retrieves a SINGLE event by its unique event_id (REQUIRED).

Import Event

Tool to import an event as a private copy to a calendar.

Get Event Instances

Returns instances of the specified recurring event.

List Events

Lists or incrementally synchronizes events from one calendar, defaulting to the connected user's primary calendar.

List Events from All Calendars

Return a unified event list across all calendars in the user's calendar list for a given time range.

Move Event

Moves an event to another calendar, i.

Watch Events

Watch for changes to Events resources.

Find event

Finds events in a specified Google Calendar using text query, time ranges (event start/end, last modification), and event types.

Find free slots

Finds both free and busy time slots in Google Calendars for specified calendars within a defined time range.

Query Calendar Availability

Queries raw busy intervals for one or more calendars or groups over an exact time range.

Get Google Calendar

Gets canonical metadata for one Google Calendar, defaulting to the authenticated user's primary calendar.

Get current date and time

Gets the current date and time, allowing for a specific timezone offset.

Get Current Google Calendar User

Identifies the Google user connected to Calendar from the primary calendar resource.

List Buildings

Lists all buildings for a Google Workspace customer account with full details including addresses, coordinates, and floor names.

List Calendar Resources

Retrieves calendar resources (such as conference rooms) from a Google Workspace domain using the Admin SDK Directory API.

List Google Calendars

Lists calendars accessible through the connected user's CalendarList, returning IDs and user-specific metadata such as access role, color, visibility, selection, and reminders.

Patch Calendar

Partially updates (PATCHes) an existing Google Calendar, modifying only the fields provided.

Patch Event

Update specified fields of an existing event in a Google Calendar using patch semantics (array fields like `attendees` are fully replaced if provided); ensure the `calendar_id` and `event_id` are valid and the user has write access to the calendar.

Quick Add Event

Parses natural language text to quickly create a basic Google Calendar event with its title, date, and time, suitable for simple scheduling; does not support direct attendee addition or recurring events, and `calendar_id` must be valid if not 'primary'.

Remove attendee from event

Removes an attendee from a specified event in a Google Calendar; the calendar and event must exist.

Get Calendar Setting

Tool to return a single user setting for the authenticated user.

List Settings

Returns all user settings for the authenticated user.

Watch Settings

Watch for changes to Settings resources.

Update Google event

Updates an existing event in Google Calendar.

FRAMEWORKS

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Grok Bot

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Codex

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Kimi Code

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Grok Build

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VS Code

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OpenCode

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OpenClaw

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Hermes

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Atomic Agent

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CLI

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Google ADK

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LangChain

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Vercel AI SDK

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Mastra AI

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AutoGen

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FAQ

Frequently asked questions

With a standalone Google Calendar MCP server, the agents and LLMs can only access a fixed set of Google Calendar tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Google Calendar and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Antigravity fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Google Calendar tools.

Yes, absolutely. You can configure which Google Calendar scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Google Calendar data and credentials are handled as safely as possible.

Start with Google Calendar.It takes 30 seconds.

Managed auth, hosted MCP servers, and every Google Calendar tool your agent needs.Free to start.

Start building

How to integrate Google Calendar MCP with Antigravity

Connect Google Calendar without auth hassles

How to integrate Google Calendar MCP with Antigravity

Also integrate Google Calendar with

Why use Composio?

Connect Google Calendar to Antigravity

1. Open the MCP Config

2. Get your API key

3. Add Composio to mcp_config.json

Connect your Google Calendar account

Conclusion

Supported Tools and Triggers

How to build Google Calendar MCP Agent with another framework

Claude Code

Cursor

ChatGPT

Claude Cowork

OpenAI Agents SDK

Claude Agent SDK

Grok Bot

Muse

Codex

Kimi Code

Grok Build

VS Code

OpenCode

OpenClaw

Hermes

Atomic Agent

CLI

Google ADK

LangChain

Vercel AI SDK

Mastra AI

LlamaIndex

CrewAI

Pydantic AI

AutoGen

Explore Other Toolkits

Apaleo

Appointo

Bart

Blue Pillow Hotels & Stays

Frequently asked questions

What are the differences in Tool Router MCP and Google Calendar MCP?+

Can I use Tool Router MCP with Antigravity?+

Can I manage the permissions and scopes for Google Calendar while using Tool Router?+

How safe is my data with Composio Tool Router?+

Start with Google Calendar.It takes 30 seconds.

3. Add Composio to `mcp_config.json`