How to connect Mailercloud to Claude Cowork

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 Mailercloud account to Cowork via Composio Connect, enabling it to send a newsletter to all VIP contacts, add a new subscriber to marketing list, get open rates for last week's campaign, and more such actions on your behalf without compromising your account security.

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Mailercloud is a modern email marketing platform for businesses of all sizes. It makes campaign management and audience growth fast and simple.

6 Tools

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 Mailercloud account to Cowork via Composio Connect, enabling it to send a newsletter to all VIP contacts, add a new subscriber to marketing list, get open rates for last week's campaign, and more such actions on your behalf without compromising your account security.

Also integrate Mailercloud with

Connecting Mailercloud 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 Mailercloud account

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

For example, ask Cowork to:

  • "Send a newsletter to all VIP contacts"
  • "Add a new subscriber to marketing list"
  • "Get open rates for last week's campaign"

It will prompt you to authenticate and authorize access.

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

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

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

TOOLS

Supported Tools

Every Mailercloud action and event your agent gets out of the box.

Create List

Tool to create a new recipient list in Mailercloud for storing and managing contacts.

Create custom property

Create a custom property for contacts in Mailercloud.

Delete Contact Property

Tool to delete a custom contact property by ID.

Get Client Plan

Tool to retrieve client plan information from Mailercloud.

Search Contacts in List

Tool to retrieve contacts in a specific list with pagination.

Update Contact Property

Tool to update a custom property of contacts in Mailercloud.

FAQ

Frequently asked questions

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

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

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