# How to connect Customer.io MCP to Claude Cowork

```json
{
  "title": "How to connect Customer.io MCP to Claude Cowork",
  "toolkit": "Customer.io MCP",
  "toolkit_slug": "customerio_mcp",
  "framework": "Claude Cowork",
  "framework_slug": "claude-cowork",
  "url": "https://composio.dev/toolkits/customerio_mcp/framework/claude-cowork",
  "markdown_url": "https://composio.dev/toolkits/customerio_mcp/framework/claude-cowork.md",
  "updated_at": "2026-08-24T07:23:11.686Z"
}
```

## 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 Customer.io account to Cowork via Composio Connect, enabling it to add user to onboarding campaign now, create broadcast for new feature announcement, update person attributes and trigger campaign, and more such actions on your behalf without compromising your account security.

## Also integrate Customer.io MCP with

- [ChatGPT Work](https://composio.dev/toolkits/customerio_mcp/framework/chatgpt)
- [Hermes](https://composio.dev/toolkits/customerio_mcp/framework/hermes-agent)

## Connect Customer.io MCP to Claude Cowork

### Connecting Customer.io 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.
2. Add the Composio MCP server
Click Add custom connector and paste in the Composio MCP server URL:

```bash
https://connect.composio.dev/mcp
```

## 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 Customer.io through MCP without you sharing account credentials directly with the agent.

## What is the Customer.io MCP server, and what's possible with it?

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

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `CUSTOMERIO_MCP_CIO_AUTH_STATUS` | Cio auth status | Show the active authentication state. Reports the authenticated user and account, the workspaces the current OAuth token is allowed to access, and whether an agent service-account JWT can be minted. Use this to diagnose auth errors. |
| `CUSTOMERIO_MCP_CIO_DELETE_API` | Cio delete api | Delete a resource via the Customer.io API (DELETE only). Always run with dry_run first to preview. Use cio_schema to find the correct path. |
| `CUSTOMERIO_MCP_CIO_PRIME` | Cio prime | Print LLM-ready instructions for using the Customer.io API. ALWAYS call this first in a new task — it contains the authoritative, version-specific rules for how to drive the API via the other cio_* tools. |
| `CUSTOMERIO_MCP_CIO_READ_API` | Cio read api | Read from the Customer.io API (GET only). Use cio_schema first to find the correct path and placeholders. Workspace routing is enforced server-side via the caller's OAuth token. |
| `CUSTOMERIO_MCP_CIO_SCHEMA` | Cio schema | Introspect the Customer.io API schema. Use this to discover endpoints before calling cio_read_api / cio_write_api / cio_delete_api — never guess paths or field names. Pass no query to list resources; pass a resource name ('campaigns') to list its endpoints; pass 'resource.method' ('campaigns.list'), 'METHOD /path', or '/path' for endpoint detail. |
| `CUSTOMERIO_MCP_CIO_SKILLS_LIST` | Cio skills list | List available agent skills — task-specific instruction manuals maintained by Customer.io (routing rules, required params, multi-step workflows). |
| `CUSTOMERIO_MCP_CIO_SKILLS_READ` | Cio skills read | Read the full content of a specific agent skill. Paths look like 'campaigns' for the main skill or 'campaigns/examples.md' for a sub-file — see cio_skills_list for available paths. |
| `CUSTOMERIO_MCP_CIO_WRITE_API` | Cio write api | Write to the Customer.io API (POST, PUT, or PATCH). Always run with dry_run first to preview. Use cio_schema to find the correct path, method, and body shape. |

## Supported Triggers

None listed.

## Creating MCP Server - Stand-alone vs Composio SDK

The Customer.io MCP server connects Claude Cowork to your Customer.io account through Composio. Once connected, Cowork can use the available Customer.io tools and triggers to complete tasks on your behalf.

## Complete Code

None listed.

## How to build Customer.io MCP Agent with another framework

- [ChatGPT Work](https://composio.dev/toolkits/customerio_mcp/framework/chatgpt)
- [Hermes](https://composio.dev/toolkits/customerio_mcp/framework/hermes-agent)

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- [Constant Contact](https://composio.dev/toolkits/constant_contact) - Constant Contact is an email marketing and automation platform for small businesses. It helps teams build campaigns, manage contacts, and grow customer relationships.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Customer.io MCP?

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

### Can I manage the permissions and scopes for Customer.io while using Tool Router?

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

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