How to connect Sender to Claude Cowork

Trusted by teams atAWSGleanZoomAirtable

30 min · no commitment · see it on your stack

Sender logo
Claude Cowork logo
divider

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 Sender account to Cowork via Composio Connect, enabling it to create a new email campaign for holiday sale, add a contact to your main subscriber list, get open rates for last week's campaigns, and more such actions on your behalf without compromising your account security.

Also integrate Sender with

Connecting Sender 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 Sender account

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

For example, ask Cowork to:

  • "Create a new email campaign for holiday sale"
  • "Add a contact to your main subscriber list"
  • "Get open rates for last week's campaigns"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your Sender 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 Sender through MCP without you sharing account credentials directly with the agent.

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

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

Supported Tools & Triggers

Tools
Create FieldTool to create a new custom subscriber field in Sender.
Create Or Update SubscriberTool to create a new subscriber or update an existing one in Sender.
Get All FieldsTool to retrieve a list of all custom subscriber fields configured in the Sender.
Get All WorkflowsTool to retrieve a list of all automation workflows in the Sender account.
Get Campaign By IDTool to retrieve a specific campaign by its unique ID from Sender.
Get Group By IDTool to retrieve a specific subscriber group by its unique ID from Sender.
Get Subscriber By EmailTool to retrieve a specific subscriber by their email address from Sender.
Get Subscriber By IDTool to retrieve a specific subscriber by their unique ID from Sender.
Update Subscriber FieldsTool to update custom fields and information for an existing subscriber in Sender.

How to build Sender MCP Agent with another framework

FAQ

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

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

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

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

Used by agents from

Context
Letta
glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai
Context
Letta
glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai
Context
Letta
glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai

Never worry about agent reliability

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