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How to connect Emailoctopus to Claude

Connect Claude Web, Desktop and Cowork to Emailoctopus MCP. Add new subscribers to your newsletter list, unsubscribe a user from marketing emails, and more using natural language, with authentication handled for you.

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EmailOctopus is a straightforward email marketing platform for creating, sending, and analyzing campaigns. It helps you grow and engage your audience with affordable, easy-to-use tools.

20 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Emailoctopus account to Claude via Composio Connect, enabling it to add new subscribers to your newsletter list, unsubscribe a user from marketing emails, list all recent email campaigns sent, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Emailoctopus with

Claude CodeOpenAI Agents SDKClaude Agent SDKCodexOpenClawHermesAtomic AgentGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

Connecting Emailoctopus to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

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

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

2. 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 Web, Desktop, and Cowork

3. Connect your Emailoctopus account

Back in Claude, ask it to connect to Emailoctopus or give it any Emailoctopus-related task.

For example, ask Claude to:

  • "Add new subscribers to your newsletter list"
  • "Unsubscribe a user from marketing emails"
  • "List all recent email campaigns sent"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Emailoctopus account is ready to use.

What is the Emailoctopus Claude Connector, and what's possible with it?

The Emailoctopus MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Emailoctopus account. It provides structured and secure access to your subscriber lists, contacts, and campaigns, so your agent can perform actions like managing lists, adding contacts, launching campaigns, and handling unsubscriptions on your behalf.

  • Seamless contact management: Your agent can create new contacts, update details, or remove subscribers from your marketing lists in seconds.
  • Mailing list creation and organization: Effortlessly set up new mailing lists and keep your audience segmented for targeted campaigns.
  • Campaign insights and retrieval: Instantly access details about your recent email campaigns, including summaries and performance data.
  • Automated unsubscriptions and compliance: Quickly unsubscribe contacts or delete them to keep your lists clean and privacy-compliant.
  • Bulk list management: Retrieve and organize all mailing lists in your account, making it easy to scale and update your marketing efforts.

Troubleshooting

1. Why does Claude not use the Composio connector for Emailoctopus?

The connector can show as connected, but Claude must use it in each Emailoctopus conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Emailoctopus again.

2. Why does Claude show an MCP server error before Emailoctopus connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Emailoctopus.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Emailoctopus.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Emailoctopus authorization link not work?

The Composio connector is one server. Your Emailoctopus account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Emailoctopus connection.
  • Composio creates a fresh Emailoctopus authorization link.
  • Open that link in your browser and finish the Emailoctopus sign-in.

4. Why do Emailoctopus actions fail after they worked before?

The Emailoctopus connection can expire or lose permission.

  • Ask Claude to inspect the Emailoctopus connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Emailoctopus account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Emailoctopus.
  • If the action still fails with a permission error, check that the connected account has that permission in Emailoctopus itself.

5. How do I switch to a different Emailoctopus account?

Claude can manage the Emailoctopus connection for you.

  • Ask Claude to disconnect or delete the current Emailoctopus account.
  • Ask Claude to connect Emailoctopus again.
  • Open the new Composio authorization link for Emailoctopus.
  • Sign in with the other Emailoctopus account in the browser.
  • After the account connects, ask Claude to retry the Emailoctopus task.

6. Why is my Emailoctopus connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Emailoctopus connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Emailoctopus tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Emailoctopus.
TOOLS

Supported Tools

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

Create Contact

This tool creates a new contact in EmailOctopus.

Create Field

Tool to create a new custom field on an EmailOctopus mailing list.

Create List

Creates a new mailing list in EmailOctopus for organizing and managing email contacts.

Create Tag

Tool to create a new tag on an EmailOctopus mailing list.

Delete Contact

Permanently deletes a contact from a specified EmailOctopus list.

Delete Field

Permanently deletes a custom field from a specified EmailOctopus list.

Delete List

This tool allows you to delete an existing mailing list from your EmailOctopus account.

Delete Tag

Tool to delete a tag from a mailing list in EmailOctopus.

Get All Lists

This tool retrieves all the mailing lists associated with the EmailOctopus account.

Get Contact

Tool to retrieve details of a specific contact from an EmailOctopus list.

Get List

Retrieves details of a specific mailing list by ID.

Get Recent Campaigns

This tool retrieves a list of recent campaigns from the EmailOctopus account.

List Contacts

Tool to retrieve contacts from an EmailOctopus list.

List Tags

Tool to retrieve all tags from a mailing list.

Unsubscribe Contact

Unsubscribes a contact from an EmailOctopus mailing list.

Batch Update Contacts

Tool to update multiple contacts in an EmailOctopus list in a single batch operation.

Update Field

Updates an existing custom field on an EmailOctopus list including its label, tag, type, and fallback value.

Update List

Tool to update an existing mailing list's name in EmailOctopus.

Update Tag

Tool to update an existing tag on a mailing list.

Create or Update Contact

Tool to create or update a contact in EmailOctopus.

FRAMEWORKS

How to build Emailoctopus MCP Agent with another framework

Claude Code logo

Claude Code

Use Emailoctopus MCP with Claude Code

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Emailoctopus MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Emailoctopus MCP with Claude Agent SDK

Codex logo

Codex

Use Emailoctopus MCP with Codex

OpenClaw logo

OpenClaw

Use Emailoctopus MCP with OpenClaw

Hermes logo

Hermes

Use Emailoctopus MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Emailoctopus MCP with Atomic Agent

Google ADK logo

Google ADK

Use Emailoctopus MCP with Google ADK

LangChain logo

LangChain

Use Emailoctopus MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Emailoctopus MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Emailoctopus MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Emailoctopus MCP with LlamaIndex

CrewAI logo

CrewAI

Use Emailoctopus MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Emailoctopus MCP with Pydantic AI

AutoGen logo

AutoGen

Use Emailoctopus MCP with AutoGen

FAQ

Frequently asked questions

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

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

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