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How to integrate Zoho Calendar MCP with Hermes

Connect Hermes to Zoho Calendar MCP. Create a recurring zoho calendar team meeting, check availability before scheduling a client call, and more using natural language, with authentication handled for you.

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Zoho Calendar is a scheduling service for managing calendars, events, availability, and resource bookings. It helps teams coordinate meetings and shared resources across Zoho data centers.

57 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 Zoho Calendar 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 Zoho Calendar with

ChatGPTClaude CoworkAtomic Agent

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 Zoho Calendar 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 Zoho Calendar

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

4. Done. You're all set with a new Zoho Calendar 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 Zoho Calendar or request any Zoho Calendar-related task. It will prompt you to authenticate and authorize access.

5. Done!

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

The Zoho Calendar MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Zoho Calendar account. It provides structured and secure access to your calendars, events, availability, settings, and resource bookings, so your agent can schedule events, find free time, manage calendars, and book rooms on your behalf.

  • Event and calendar management: Have your agent create timed, all-day, or recurring events, retrieve event details, list events for a date range, and delete events or selected recurrences.
  • Calendar organization: Let the agent create, view, list, and delete personal calendars, check calendar settings, and review sharing entries for a calendar.
  • Availability planning: Direct your agent to check a user's free and busy times, inspect room availability, and list recurring event instances within a date range.
  • Room booking: Instruct your agent to find available rooms, create bookings with attendees and recurrence options, view or delete bookings, and list your upcoming room reservations.
  • Resource administration: Have your agent manage resource booking branches, rooms, features, favorite resources, and organization or user booking settings.

Way Forward

With Zoho Calendar 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 Zoho Calendar action and event your agent gets out of the box.

Check Resource Booking Access

Check whether Resource Booking is enabled for the connected Zoho account.

Create Resource Booking

Book one or more available rooms in paid Zoho Resource Booking, optionally with attendees, groups, notifications, or a daily, weekly, or monthly recurrence.

Create Resource Booking Branch

Create a branch with buildings and floors in paid Zoho Resource Booking.

Create Calendar

Create a personal calendar with a required name and color.

Create Event

Create a timed, all-day, or recurring Zoho Calendar event without creating Zoho Meeting conferencing.

Create Resource Booking Room

Create a room in paid Zoho Resource Booking.

Create Resource Booking Organization Settings

Initialize organization-wide limits in paid Zoho Resource Booking.

Create Resource Booking User Settings

Initialize user preferences in paid Zoho Resource Booking.

Create Resource Feature

Create a feature definition in paid Zoho Resource Booking.

Delete Resource Booking

Permanently delete one room booking, all or future recurrence occurrences, or one selected occurrence.

Delete Resource Booking Branch

Permanently delete a branch from paid Zoho Resource Booking.

Delete Calendar

Permanently delete a calendar and return Zoho's deletion envelope.

Delete Event

Delete an event, all following recurrences, or one recurrence instance using the latest ETag.

Delete Event Attachments

Remove specified attachments from an event using its full date/time data and latest ETag; the event itself remains.

Delete Resource

Permanently delete a room resource from paid Zoho Resource Booking.

Delete Resource Feature

Permanently delete a feature from paid Zoho Resource Booking.

Download Event Attachment

Download one event attachment.

Download Resource Image

Download one resource image by its opaque image ID, exact provider file name, and owning resource ID.

Favorite Resource

Mark one room as a favorite for the connected user.

Get Resource Booking

Return one room booking or a specified recurrence occurrence from paid Zoho Resource Booking.

Get Resource Booking Branch

Return one Resource Booking branch with its buildings and floors.

Get Calendar

Return full details for one calendar UID, including the documented default or primary aliases.

Get Calendar Settings

Return the connected user's Calendar preferences.

Get Event

Return full details for one event or a specified recurrence instance.

Get Resource Booking Resource

Return one room from paid Zoho Resource Booking.

Get Resource Booking Organization Settings

Return organization-wide policy settings from paid Zoho Resource Booking.

Get Resource Booking User Settings

Return user preferences from paid Zoho Resource Booking.

Get Resource Feature

Return one feature definition from paid Zoho Resource Booking.

Get Resource Free Busy

Return strict date-keyed busy intervals for one room resource over an exact inclusive date range.

Get User Free Busy

Return event-based or time-based free/busy data for one email and exact local-naive time range.

List Resource Bookings

Return bookings for selected rooms in a paid Zoho Resource Booking branch.

List Resource Booking Branches

Return all branches from paid Zoho Resource Booking, including their buildings and floors.

List Calendars

Return calendars visible to the connected user, optionally by documented category and hidden status.

List Calendar Shares

Return user and group sharing entries for one calendar.

List Event Instances

Return recurrence instances for one repeating event in a required range of at most 90 days.

List Events

Return events in one calendar for a required range of at most 31 days.

List Favorite Resources

Return the connected user's favorite room resources from paid Zoho Resource Booking.

Get Group Attendee Statuses

Return member RSVP statuses for one group attendee on an event.

List My Resource Bookings

Return the connected user's room bookings for an exact date range.

List Resource Availability

Return room resources and availability for a branch, optional building or floor, and an exact date/time range.

List Resource Booking User Settings

List user settings for at least one branch, building, or floor in paid Zoho Resource Booking.

List Resource Features

Return all feature definitions from paid Zoho Resource Booking.

List Resources

Return room resources for at least one branch, building, or floor.

Move Event

Move an event between personal or group calendars, optionally changing documented event details; shared and app calendars are unsupported and recurrence changes affect all occurrences.

Replace Event

Replace an event using complete date/time data and its latest ETag, without adding Zoho Meeting conferencing.

Unfavorite Resource

Remove one room from the connected user's favorites.

Update Resource Booking

Update a room booking or selected recurrence occurrences in paid Zoho Resource Booking.

Update Resource Booking Branch

Update a branch or add or remove its buildings and floors in paid Zoho Resource Booking.

Update Calendar

Update one or more documented properties of an existing calendar.

Update Calendar Settings

Update a non-empty set of the connected user's documented Calendar preferences.

Update Calendar Share

Supports add, edit, and revoke modes for one user or group calendar share; operation='delete' revokes access, so every call is pessimistically gated as destructive.

Update Event

Partially update event fields or attendee data using exactly one documented payload.

Update Resource

Update a room, its feature assignments, or its visibility in paid Zoho Resource Booking.

Update Resource Booking Organization Settings

Update organization-wide booking limits in paid Zoho Resource Booking.

Update Resource Booking User Settings

Update user preferences in paid Zoho Resource Booking.

Update Resource Feature

Rename or hide a feature in paid Zoho Resource Booking.

Upload Event Attachment

Upload one file of at most 10,240 kB.

FRAMEWORKS

How to build Zoho Calendar MCP Agent with another framework

ChatGPT logo

ChatGPT

Use Zoho Calendar MCP with ChatGPT

Claude Cowork logo

Claude Cowork

Use Zoho Calendar MCP with Claude Cowork

Atomic Agent logo

Atomic Agent

Use Zoho Calendar MCP with Atomic Agent

FAQ

Frequently asked questions

With a standalone Zoho Calendar MCP server, the agents and LLMs can only access a fixed set of Zoho Calendar tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Zoho Calendar 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 Zoho Calendar tools.

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

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