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How to integrate Nylas MCP with Hermes

Connect Hermes to Nylas MCP. Summarize unread emails from this morning, create draft replies to urgent messages, and more using natural language, with authentication handled for you.

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Nylas MCP is a regional hosted server exposing typed tools for email, calendar, contacts, and Notetaker workflows. Use it to give agents reliable, typed access to messaging and scheduling data.

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 Nylas 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 Nylas 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 Nylas 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 Nylas

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

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

5. Done!

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

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

Way Forward

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

Availability

Use this for availability, free time, or "when am I free" requests for one or more users.

Confirm send draft

MUST be called before send_draft.

Confirm send message

MUST be called before send_message.

Create draft

Create a draft email.

Create event

Create a calendar event.

Current time

Get current epoch time and ISO 8601 date.

Datetime to epoch

Convert date (YYYY-MM-DD), time (HH:MM:SS), and timezone to Unix timestamp.

Delete draft

Delete a draft.

Delete event

Delete an event.

Download attachment

Download an email attachment by message ID and attachment ID (maximum 10 MiB).

Epoch to datetime

Convert Unix timestamps to human-readable date-time.

Get contact

Get a single contact by ID.

Get event

Get a single event by ID.

Get folder by

Get a folder by ID.

Get grant

Look up grant by email address.

Get message

Get a single email message by ID.

Get notetaker

Get details for one grant-scoped Notetaker bot by notetaker_id.

Get notetaker media

Get fresh media links for one grant-scoped Notetaker bot.

Get notetaker transcript

Get the transcript for one grant-scoped Notetaker bot by notetaker_id.

Get search syntax

Get provider-specific search query syntax for use with search_query_native in list_messages/list_threads.

Get standalone notetaker

Get details for one standalone Notetaker bot by notetaker_id.

Get standalone notetaker media

Get fresh media links for one standalone Notetaker bot.

List calendars

List all calendars.

List contacts

List contacts.

List events

List events in a calendar.

List folders

List email folders/labels.

List messages

List and search email messages.

List notetakers

List grant-scoped Notetaker bots.

List standalone notetakers

List standalone Notetaker bots for the application.

List threads

List and search email threads.

Schedule notetaker

Schedule a grant-scoped Notetaker bot for a future Google Meet, Microsoft Teams, or Zoom meeting.

Schedule standalone notetaker

Schedule a standalone Notetaker bot for a future Google Meet, Microsoft Teams, or Zoom meeting without tying it to a grant.

Send draft

Send an existing draft.

Send message

Send an email immediately.

Send notetaker

Send a grant-scoped Notetaker bot to an active Google Meet, Microsoft Teams, or Zoom meeting.

Send standalone notetaker

Send a standalone Notetaker bot to an active Google Meet, Microsoft Teams, or Zoom meeting without tying it to a grant.

Update draft

Update an existing draft.

Update event

Update an existing event.

FRAMEWORKS

How to build Nylas MCP Agent with another framework

ChatGPT Work logo

ChatGPT Work

Use Nylas MCP with ChatGPT Work

Claude Cowork logo

Claude Cowork

Use Nylas MCP with Claude Cowork

FAQ

Frequently asked questions

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

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

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