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How to connect Calendly MCP with ChatGPT Work

Connect ChatGPT Work to Calendly MCP. Find next available time for client, create scheduling link for 30-minute meeting, and more using natural language, with authentication handled for you.

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Calendly is an appointment scheduling platform that manages event types, availability, and invites. Use it to automate booking, reduce back-and-forth, and surface open times quickly.

36 Tools

How to connect Calendly MCP with ChatGPT Work

ChatGPT Work is an agent inside ChatGPT built for your most ambitious work. It takes action across your apps and files, stays with a project for hours, and turns a goal into finished materials like sheets, slides, and docs - not just answers.

In this guide, I will explain the easiest and most secure way to connect your Calendly account to ChatGPT Work via Composio Connect, so it can manage your event types, find open times, generate scheduling links, book meetings, and cancel events through natural language commands without ever putting your account credentials at risk.

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Why use Composio over default connectors?

  • Apps with read and write access. Default connectors mostly can read your data. Composio's Calendly integration lets ChatGPT Work take actions like creating drafts, sending updates, labeling records, and more.
  • 1,500+ SaaS toolkits out of the box. Composio gives you instant access to a vast catalog of pre-built connectors, from Gmail and Slack to Notion, Linear, and Salesforce.
  • One MCP server for every app. Connect any of your applications on demand through a single endpoint, rather than juggling a separate server for each app.
  • Smart, context-aware tool loading. Unlike traditional MCP servers that dump every available tool into the LLM context window, Composio searches for and loads only the tools relevant to the task at hand.
  • Cross-app automation. Chain actions across multiple apps in a single run - fetch a thread, summarize it in Notion, and post highlights to Slack without leaving the conversation.

Prerequisites

  • A ChatGPT account with access to ChatGPT Work (rolling out across Pro, Enterprise, Edu, Plus, and Business plans). We will use the ChatGPT desktop app, which is available on every plan.
  • Access to the Calendly workspace you want to connect.
  • Composio MCP.

Note: Composio connects through OAuth. You will be asked to sign in and approve specific permissions. Review the permission screen carefully if you are using a work account.

Step-by-step: Connect Calendly to ChatGPT Work

1. Open the MCP settings

In ChatGPT Work, go to Settings and open the Plugins section. Inside the Plugins page, click the MCP tab.

ChatGPT Work settings showing the Plugins page with the MCP tab selected

2. Add the server

Click Add server. In the Name field enter Composio, for Type select Streamable HTTP, and in the URL field paste the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
ChatGPT Work Add server dialog with the name Composio, type Streamable HTTP, and the Composio MCP URL

Then click Save. The Composio server now appears in your MCP plugins list.

ChatGPT Work Plugins page showing the Composio MCP server added to the list

3. Authenticate

Click Authenticate, log in via Composio, and click Allow access to authorize ChatGPT Work to use your Composio account.

Composio login and Allow access screen for ChatGPT Work MCP setup

4. Start using Composio

That is it - Composio tools are now available in ChatGPT Work. Ask it to work with your Calendly account and it will run the actions you authorize.

What you can do after connecting Calendly

  • Find next available time for client
  • Create scheduling link for 30-minute meeting
  • Cancel meeting on May 5th and notify

Security + privacy notes (important)

  • Use least-privilege access: Only grant permissions you actually need.
  • Review OAuth permissions before approving: Make sure requested scopes match what you expect Composio and ChatGPT Work to do.
  • Keep write actions human-reviewed: For actions like sending messages, creating labels, or editing drafts, keep manual confirmation enabled.
  • Be careful with sensitive data: Avoid using this setup with highly sensitive information unless allowed by your personal, company, or client policies.
TOOLS

Supported Tools

Every Calendly MCP action and event your agent gets out of the box.

Availability-get user availability schedule

Use: Fetch details for one named availability schedule.

Availability-list user availability schedules

Use: List all named availability schedules for the connected user.

Availability-list user busy times

Use: List a user's busy time blocks within a date range.

Event types-create event type

Use: Create a new event type on the connected account.

Event types-get event type

Use: Fetch full details for one event type by URI.

Event types-list event type availability schedule

Use: Read the current availability schedule (rules) for an event type.

Event types-list event type available times

Use: List bookable time slots for an event type within a date range.

Event types-list event types

Use: List all event types for the connected user or org.

Event types-update event type

Use: Update fields on an existing event type.

Event types-update event type availability schedule

Use: Overwrite the availability schedule for an event type.

List calendly skills

List or search available Calendly skill guides.

Load calendly skill

Load a Calendly skill guide that provides domain-specific context, recommended queries, and best practices for working with Calendly tools.

Locations-list user meeting locations

Use: List allowed meeting location kinds for a user.

Meetings-cancel event

Use: Cancel a scheduled meeting on behalf of the connected host When: User confirms they want to cancel a specific meeting.

Meetings-create invitee

Use: Book a meeting slot for an invitee on a Calendly event type.

Meetings-create invitee no show

Use: Mark an invitee as a no-show for a past meeting.

Meetings-delete invitee no show

Use: Remove a no-show mark from an invitee.

Meetings-get event

Use: Fetch details for a single scheduled meeting.

Meetings-get event invitee

Use: Fetch details for a single meeting invitee.

Meetings-get invitee no show

Use: Fetch the no-show record for a meeting invitee.

Meetings-list event invitees

Use: List all invitees for a scheduled meeting.

Meetings-list events

Use: List scheduled meetings for user/org.

Organizations-create organization invitation

Use: Invite a user to the organization by email.

Organizations-get organization

Use: Fetch details for the connected user's organization.

Organizations-get organization membership

Use: Fetch details for a single org membership.

Organizations-list organization invitations

Use: List pending invitations for the organization.

Organizations-list organization memberships

Use: List all members of an organization.

Organizations-revoke organization invitation

Use: Revoke a pending organization invitation.

Routing forms-get routing form

Use: Fetch details for a single routing form.

Routing forms-get routing form submission

Use: Fetch details for a single routing form submission.

Routing forms-list routing forms

Use: List routing forms for the org.

Routing forms-list routing form submissions

Use: List submissions for a routing form.

Scheduling links-create single use scheduling link

Use: Create a single-use scheduling link using the event type's settings unchanged.

Shares-create share

Use: Create a single-use share link for a one-on-one event type with per-link overrides When: User wants a single-use link with any customization (duration, scheduling window, location, or availability).

Users-get current user

Use: Resolve the connected host account and canonical user URI.

Users-get user

Use: Fetch profile for a specific user by URI.

FRAMEWORKS

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FAQ

Frequently asked questions

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

Yes, you can. ChatGPT Work 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 Calendly tools.

Yes, absolutely. You can configure which Calendly 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 Calendly data and credentials are handled as safely as possible.

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