How to connect Agent mail to Claude Cowork

Agent mail logo
Claude Cowork logo
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Introduction

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks.

This guide walks you through the easiest and most secure way to connect your Agent mail account to Cowork via Composio Connect, enabling it to show me unread emails from today, send a status update to your team, find emails with invoice attachments, and more such actions on your behalf without compromising your account security.

Also integrate Agent mail with

Connecting Agent mail to Claude Cowork

1. Open Customize

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

2. Add the Composio MCP server

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

3. 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 Cowork

4. Connect your Agent mail account

Back in Cowork, ask the agent to connect to Agent mail or give it any Agent mail-related task.

For example, ask Cowork to:

  • "Show me unread emails from today"
  • "Send a status update to your team"
  • "Find emails with invoice attachments"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your Agent mail account is ready to use.

What is Claude Cowork?

Claude Cowork is Anthropic's agent for general knowledge work. It can use your computer, files, and connected applications to complete longer-running tasks across your work tools.

With Composio Connect, Cowork can securely access apps like Agent mail through MCP without you sharing account credentials directly with the agent.

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

The Agent mail MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Agent mail account. It provides structured and secure access to your agent's dedicated inbox, so your agent can send emails, receive incoming messages, fetch specific conversations, and automate email-based workflows on your behalf.

  • Automated email sending: Instruct your agent to compose and send emails to any recipient, perfect for status updates, notifications, or outreach.
  • Message listing and inbox scanning: Let your agent quickly list all recent messages in the inbox to summarize, monitor, or trigger follow-up actions.
  • Targeted message retrieval: Have your agent fetch a specific message by ID, making it easy to pull full email content for context-aware decisions or replies.
  • Streamlined agent-to-agent communication: Enable your AI to directly interact with other agents or services via email, automating routine communication flows.

Supported Tools & Triggers

Tools
Triggers
Get MessageGet a specific message from an agentmail inbox
List MessagesList messages from an agentmail inbox
Send EmailSend an email using agentmail api

Available tools and triggers

After setup, the supported Agent mail tools and triggers listed on this page are available to Cowork through Composio Connect.

You can now ask Cowork to handle Agent mail workflows in natural language, from quick summaries and drafting tasks to more complex multi-step work across connected apps.

How to build Agent mail MCP Agent with another framework

FAQ

What are the differences in Tool Router MCP and Agent mail MCP?

With a standalone Agent mail MCP server, the agents and LLMs can only access a fixed set of Agent mail tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Agent mail and many other apps based on the task at hand, all through a single MCP endpoint.

Can I use Tool Router MCP with Claude Cowork?

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 Agent mail tools.

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

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

Used by agents from

Context
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Context
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HubSpot
Agent.ai
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Context
Letta
glean
HubSpot
Agent.ai
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Entelligence
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Never worry about agent reliability

We handle tool reliability, observability, and security so you never have to second-guess an agent action.