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How to integrate Calendly MCP with Hermes

Connect Hermes 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

Introduction

Hermes is a 24/7 autonomous agent that lives on your computer or server — it remembers what it learns and evolves as your usage grows.

This guide explains the easiest and most robust way to connect your Calendly account to Hermes. You can do this through either Composio Connect CLI or Composio Connect MCP. For personal use we recommend the CLI, but you won't go wrong with MCP either.

Also integrate Calendly MCP with

ChatGPT WorkClaude Cowork

What is Composio Connect?

Composio Connect is a consumer offering that lets anyone plug 1,500+ applications directly into their agent harness — including Hermes. It can:

  • Search and load tools from relevant toolkits on-demand, reducing context usage.
  • Chain multiple tools to accomplish complex workflows via a remote workbench, without excessive back-and-forth with the LLM.
  • Manage app authentication end-to-end with zero manual overhead.

Integrating Calendly with Hermes

Using Composio Connect CLI

1. Install the Composio CLI

Run the install script directly, or paste https://composio.dev/hermes into your Hermes chat box to have it installed for you.

bash
curl -fsSL https://composio.dev/install | bash
Hermes authenticating with Composio

2. Authenticate

Once the CLI is installed, ask Hermes to authenticate with Composio.

3. Connect to Calendly

Ask your agent to connect to Calendly, or simply request any Calendly-related task. Hermes will prompt you to authenticate and authorize access.

4. Done. You're all set with a new Calendly connection.

Using Composio Connect MCP

1. Get your MCP URL and API Key

Go to dashboard.composio.dev and copy your Connect MCP URL and API key.

Copy MCP URL and API key from Composio dashboard

2. Open the Hermes config file

bash
nano ~/.hermes/config.yaml

3. Add the Composio Connect MCP server

bash
mcp_servers:
  composio:
    url: "https://connect.composio.dev/mcp"
    headers:
      x-consumer-api-key: "YOUR_COMPOSIO_API_KEY"
    connect_timeout: 60
    timeout: 180

Save with Ctrl + O, Enter, then exit with Ctrl + X.

4. Restart your Hermes agent

Once restarted, ask your agent to connect to Calendly or request any Calendly-related task. It will prompt you to authenticate and authorize access.

5. Done!

What is the Calendly MCP server, and what's possible with it?

The Calendly MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Calendly account. It provides structured and secure access so your agent can perform Calendly operations on your behalf.

Way Forward

With Calendly connected, Hermes can now act on your behalf whenever it detects a relevant task or you ask it to.

From here, you can extend Hermes further:

  • Connect more apps: Calendar, Slack, Notion, Linear, and hundreds of others are available through the same Composio Connect setup. Each new integration compounds what Hermes can do for you.
  • Build workflows across tools: Once multiple apps are connected, Hermes can chain actions together — turn an email into a calendar invite, a Slack message into a Linear ticket, or a meeting note into a follow-up draft.
  • Let it learn your patterns: The more you use Hermes, the better it gets at anticipating how you'd handle recurring tasks. Give it feedback on drafts and decisions, and it will adapt.

If you run into trouble or want to share what you've built, join the community or check out the Docs for deeper configuration options.

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

How to build Calendly MCP Agent with another framework

ChatGPT Work logo

ChatGPT Work

Use Calendly MCP with ChatGPT Work

Claude Cowork logo

Claude Cowork

Use Calendly MCP with Claude Cowork

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. Hermes 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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