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How to connect Nylas MCP to Claude

Connect Claude Web, Desktop and Cowork 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

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Nylas account to Claude via Composio Connect, enabling it to summarize unread emails from this morning, create draft replies to urgent messages, schedule meetings from email threads, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

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Connecting Nylas to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Nylas account

Back in Claude, ask it to connect to Nylas or give it any Nylas-related task.

For example, ask Claude to:

  • "Summarize unread emails from this morning"
  • "Create draft replies to urgent messages"
  • "Schedule meetings from email threads"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Nylas account is ready to use.

What is the Nylas Claude Connector, 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.

Troubleshooting

1. Why does Claude not use the Composio connector for Nylas?

The connector can show as connected, but Claude must use it in each Nylas conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Nylas again.

2. Why does Claude show an MCP server error before Nylas connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Nylas.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Nylas.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Nylas authorization link not work?

The Composio connector is one server. Your Nylas account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Nylas connection.
  • Composio creates a fresh Nylas authorization link.
  • Open that link in your browser and finish the Nylas sign-in.

4. Why do Nylas actions fail after they worked before?

The Nylas connection can expire or lose permission.

  • Ask Claude to inspect the Nylas connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Nylas account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Nylas.
  • If the action still fails with a permission error, check that the connected account has that permission in Nylas itself.

5. How do I switch to a different Nylas account?

Claude can manage the Nylas connection for you.

  • Ask Claude to disconnect or delete the current Nylas account.
  • Ask Claude to connect Nylas again.
  • Open the new Composio authorization link for Nylas.
  • Sign in with the other Nylas account in the browser.
  • After the account connects, ask Claude to retry the Nylas task.

6. Why is my Nylas connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Nylas connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Nylas tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Nylas.
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

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ChatGPT logo

ChatGPT

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Hermes logo

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Atomic Agent logo

Atomic Agent

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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. Claude Cowork 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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