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How to connect Nylas MCP with ChatGPT Work

Connect ChatGPT Work 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.

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How to connect Nylas MCP with ChatGPT Work

ChatGPT Work is an agent inside ChatGPT built for your most ambitious work. It takes action across your apps and files, stays with a project for hours, and turns a goal into finished materials like sheets, slides, and docs - not just answers.

In this guide, I will explain the easiest and most secure way to connect your Nylas account to ChatGPT Work via Composio Connect, so it can read your emails, draft replies, schedule calendar events, sync your contacts, and capture meeting notes through natural language commands without ever putting your account credentials at risk.

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Why use Composio over default connectors?

  • Apps with read and write access. Default connectors mostly can read your data. Composio's Nylas integration lets ChatGPT Work take actions like creating drafts, sending updates, labeling records, and more.
  • 1,500+ SaaS toolkits out of the box. Composio gives you instant access to a vast catalog of pre-built connectors, from Gmail and Slack to Notion, Linear, and Salesforce.
  • One MCP server for every app. Connect any of your applications on demand through a single endpoint, rather than juggling a separate server for each app.
  • Smart, context-aware tool loading. Unlike traditional MCP servers that dump every available tool into the LLM context window, Composio searches for and loads only the tools relevant to the task at hand.
  • Cross-app automation. Chain actions across multiple apps in a single run - fetch a thread, summarize it in Notion, and post highlights to Slack without leaving the conversation.

Prerequisites

  • A ChatGPT account with access to ChatGPT Work (rolling out across Pro, Enterprise, Edu, Plus, and Business plans). We will use the ChatGPT desktop app, which is available on every plan.
  • Access to the Nylas workspace you want to connect.
  • Composio MCP.

Note: Composio connects through OAuth. You will be asked to sign in and approve specific permissions. Review the permission screen carefully if you are using a work account.

Step-by-step: Connect Nylas to ChatGPT Work

1. Open the MCP settings

In ChatGPT Work, go to Settings and open the Plugins section. Inside the Plugins page, click the MCP tab.

ChatGPT Work settings showing the Plugins page with the MCP tab selected

2. Add the server

Click Add server. In the Name field enter Composio, for Type select Streamable HTTP, and in the URL field paste the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
ChatGPT Work Add server dialog with the name Composio, type Streamable HTTP, and the Composio MCP URL

Then click Save. The Composio server now appears in your MCP plugins list.

ChatGPT Work Plugins page showing the Composio MCP server added to the list

3. Authenticate

Click Authenticate, log in via Composio, and click Allow access to authorize ChatGPT Work to use your Composio account.

Composio login and Allow access screen for ChatGPT Work MCP setup

4. Start using Composio

That is it - Composio tools are now available in ChatGPT Work. Ask it to work with your Nylas account and it will run the actions you authorize.

What you can do after connecting Nylas

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

Security + privacy notes (important)

  • Use least-privilege access: Only grant permissions you actually need.
  • Review OAuth permissions before approving: Make sure requested scopes match what you expect Composio and ChatGPT Work to do.
  • Keep write actions human-reviewed: For actions like sending messages, creating labels, or editing drafts, keep manual confirmation enabled.
  • Be careful with sensitive data: Avoid using this setup with highly sensitive information unless allowed by your personal, company, or client policies.
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.

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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. ChatGPT Work 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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