How to integrate Calendarhero MCP with Hermes

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 Calendarhero 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.

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Api Key

Calendarhero is a powerful scheduling platform that streamlines your calendar management across multiple services. It helps you efficiently schedule, reschedule, and organize meetings without the back-and-forth.

38 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 Calendarhero 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.

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What is Composio Connect?

Composio Connect is a consumer offering that lets anyone plug 1,000+ 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 Calendarhero 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 Calendarhero

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

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

5. Done!

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

The Calendarhero MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Calendarhero account. It provides structured and secure access to your calendar management tools, so your agent can schedule meetings, manage contacts, fetch meeting details, and access your calendar integrations on your behalf.

  • Automated meeting scheduling and requests: Easily have your agent schedule new meetings, select participants, set time ranges, and include extra meeting details in just a few steps.
  • Contact creation and management: Let the agent create new contacts or fetch existing ones, so scheduling is always quick and accurate.
  • Meeting details retrieval: Ask your agent to fetch specific meeting details or get a list of all meetings within a defined timeframe, keeping you up-to-date.
  • Access and manage calendar integrations: Direct your agent to list all connected calendars, add new integrations, or access available calendars for streamlined scheduling.
  • Template and meeting type discovery: Quickly retrieve available meeting templates and types, letting your agent optimize scheduling based on your preferences and routines.

Way Forward

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

Add Calendar Connection

Add a new calendar directory/connection to the user's CalendarHero account.

Create Contact

Creates a new contact in CalendarHero with the provided contact information.

Create Meeting Request V2

Tool to create a new meeting request in CalendarHero.

Create Webhook

Creates or updates a webhook for a specific event type in CalendarHero.

Delete Contact

Tool to delete a contact from CalendarHero by its unique identifier.

Delete Meeting Task

Tool to delete a meeting task/request from CalendarHero.

Delete Meeting Type

Tool to delete a meeting type from the authenticated user's CalendarHero account.

Delete User Directory

Tool to delete a user directory by its UUID.

Delete Webhook

Tool to delete a webhook subscription for a specific event type.

Fetch Contact

Fetch Contact

Fetch Meeting Details

Tool to fetch details for meetings within a specified timeframe.

Fetch User Profile

Tool to fetch the profile details of the authenticated user.

Get Assistant Message

Tool to retrieve a reply message from the CalendarHero assistant.

Get Contact Count

Tool to get the total count of contacts in CalendarHero.

Get Meeting Categories

Retrieves the user's meeting categories' stats for a specified time period.

Get Meeting Tasks

Retrieves the user's meeting requests/tasks from CalendarHero.

Get Search Result

Tool to get a search result by ID.

Get User Directory

Tool to retrieve a user's directory by its unique identifier.

Get User Organization

Tool to retrieve the authenticated user's organization details.

Get User Savings

Tool to retrieve the authenticated user's savings information from CalendarHero.

Get Webhook Configuration

Tool to get webhook configuration for a specific event type.

Get Webhook Sample

Tool to retrieve a sample webhook payload for a specific event type.

List Meeting Templates

Retrieves all meeting templates (reusable meeting configurations) for the authenticated user.

List Meeting Types

Retrieves all meeting types configured for the authenticated CalendarHero user.

List User Calendars

Tool to list all calendar integrations connected to a user's CalendarHero account.

List User Directories

Tool to retrieve all directories configured for a user.

Search Contact

Tool to search for existing contacts.

Search Integrations

Tool to search across all user integrations for a query term.

Send Assistant Message

Tool to send a user's message into the CalendarHero assistant.

Send Reminder

Sends an email reminder to all contacts/participants about a scheduled meeting request.

Update Contact

Updates an existing contact in CalendarHero with new information.

Update Meeting Types

Tool to update meeting type configurations for the authenticated CalendarHero user.

Update Restricted Apps

Tool to update the authenticated user's restricted apps settings.

Update User

Tool to update the authenticated user's profile information.

Update User Address

Tool to update the authenticated user's address settings by providing latitude and longitude coordinates.

Update User Directory

Tool to update a user's directory in CalendarHero.

Update User Info

Updates the authenticated user's info settings in CalendarHero.

Update Work Location

Tool to update the user's work location settings in CalendarHero.

FAQ

Frequently asked questions

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

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

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