How to integrate Calendarhero MCP with Hermes

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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.

Also integrate Calendarhero with

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.

Supported Tools & Triggers

Tools
Add Calendar ConnectionAdd a new calendar directory/connection to the user's CalendarHero account.
Create ContactCreates a new contact in CalendarHero with the provided contact information.
Create Meeting Request V2Tool to create a new meeting request in CalendarHero.
Create WebhookCreates or updates a webhook for a specific event type in CalendarHero.
Delete ContactTool to delete a contact from CalendarHero by its unique identifier.
Delete Meeting TaskTool to delete a meeting task/request from CalendarHero.
Delete Meeting TypeTool to delete a meeting type from the authenticated user's CalendarHero account.
Delete User DirectoryTool to delete a user directory by its UUID.
Delete WebhookTool to delete a webhook subscription for a specific event type.
Fetch ContactFetch Contact
Fetch Meeting DetailsTool to fetch details for meetings within a specified timeframe.
Fetch User ProfileTool to fetch the profile details of the authenticated user.
Get Assistant MessageTool to retrieve a reply message from the CalendarHero assistant.
Get Contact CountTool to get the total count of contacts in CalendarHero.
Get Meeting CategoriesRetrieves the user's meeting categories' stats for a specified time period.
Get Meeting TasksRetrieves the user's meeting requests/tasks from CalendarHero.
Get Search ResultTool to get a search result by ID.
Get User DirectoryTool to retrieve a user's directory by its unique identifier.
Get User OrganizationTool to retrieve the authenticated user's organization details.
Get User SavingsTool to retrieve the authenticated user's savings information from CalendarHero.
Get Webhook ConfigurationTool to get webhook configuration for a specific event type.
Get Webhook SampleTool to retrieve a sample webhook payload for a specific event type.
List Meeting TemplatesRetrieves all meeting templates (reusable meeting configurations) for the authenticated user.
List Meeting TypesRetrieves all meeting types configured for the authenticated CalendarHero user.
List User CalendarsTool to list all calendar integrations connected to a user's CalendarHero account.
List User DirectoriesTool to retrieve all directories configured for a user.
Search ContactTool to search for existing contacts.
Search IntegrationsTool to search across all user integrations for a query term.
Send Assistant MessageTool to send a user's message into the CalendarHero assistant.
Send ReminderSends an email reminder to all contacts/participants about a scheduled meeting request.
Update ContactUpdates an existing contact in CalendarHero with new information.
Update Meeting TypesTool to update meeting type configurations for the authenticated CalendarHero user.
Update Restricted AppsTool to update the authenticated user's restricted apps settings.
Update UserTool to update the authenticated user's profile information.
Update User AddressTool to update the authenticated user's address settings by providing latitude and longitude coordinates.
Update User DirectoryTool to update a user's directory in CalendarHero.
Update User InfoUpdates the authenticated user's info settings in CalendarHero.
Update Work LocationTool to update the user's work location settings in CalendarHero.

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.

How to build Calendarhero MCP Agent with another framework

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OpenAI Agents SDK

Use Calendarhero MCP with OpenAI Agents SDK

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Claude Agent SDK

Use Calendarhero MCP with Claude Agent SDK

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Claude Code

Use Calendarhero MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Calendarhero MCP with Claude Cowork

Codex logo

Codex

Use Calendarhero MCP with Codex

OpenClaw logo

OpenClaw

Use Calendarhero MCP with OpenClaw

CLI logo

CLI

Use Calendarhero MCP with CLI

Google ADK logo

Google ADK

Use Calendarhero MCP with Google ADK

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LangChain

Use Calendarhero MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Calendarhero MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Calendarhero MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Calendarhero MCP with LlamaIndex

CrewAI logo

CrewAI

Use Calendarhero MCP with CrewAI

FAQ

What are the differences in Tool Router MCP and Calendarhero MCP?

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.

Can I use Tool Router MCP with Hermes?

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.

Can I manage the permissions and scopes for Calendarhero while using Tool Router?

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.

How safe is my data with Composio Tool Router?

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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