How to connect Sendfox 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 Sendfox account to Cowork via Composio Connect, enabling it to list all active campaigns this week, unsubscribe a contact by email address, retrieve all contacts from your main list, and more such actions on your behalf without compromising your account security.

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Sendfox is an email marketing platform focused on simple, affordable campaign management for creators and small businesses. It lets you grow and engage your audience with automated newsletters and easy contact organization.

17 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 Sendfox account to Cowork via Composio Connect, enabling it to list all active campaigns this week, unsubscribe a contact by email address, retrieve all contacts from your main list, and more such actions on your behalf without compromising your account security.

Also integrate Sendfox with

OpenAI Agents SDKClaude Agent SDKClaude CodeCodexOpenClawHermesCLIGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAI

Connecting Sendfox 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 Sendfox account

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

For example, ask Cowork to:

  • "List all active campaigns this week"
  • "Unsubscribe a contact by email address"
  • "Retrieve all contacts from your main list"

It will prompt you to authenticate and authorize access.

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

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

The Sendfox MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Sendfox account. It provides structured and secure access to your contact lists, campaigns, automations, and more, so your agent can fetch contacts, manage lists, retrieve campaign data, and automate subscriber actions on your behalf.

  • Contact management and lookup: Instantly retrieve contact details by email or ID, fetch all contacts, or discover specific fields to personalize your outreach.
  • List organization and updates: Ask your agent to fetch all your Sendfox lists, get details for a specific list, or remove contacts from lists as needed.
  • Campaign and automation insights: Effortlessly retrieve paginated lists of campaigns or automations, so you can stay on top of your email marketing performance.
  • Subscription and unsubscribe actions: Let your agent globally unsubscribe a contact or handle opt-outs automatically for better list hygiene.
  • Discover contact field metadata: Pull all available contact fields to help with dynamic contact creation or targeted updates.
TOOLS

Supported Tools

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

Delete Contact from List

Tool to remove a contact from a specific list in SendFox.

Get Automations

Tool to retrieve a list of automations.

Get Campaign by ID

Retrieve details for a specific campaign by its ID from SendFox.

Get Campaigns

Retrieve a paginated list of email campaigns from SendFox.

Get Contact by ID

Retrieves a contact's details by their unique ID from SendFox.

Get Contact Fields

Retrieves all contact fields available in the SendFox account.

Get Contacts

Tool to retrieve a paginated list of contacts.

Get Contacts in List

Tool to retrieve contacts in a specific list.

Get Current User

Tool to retrieve information about the authenticated user from SendFox.

Get Forms

Tool to retrieve a paginated list of forms from SendFox.

Get List by ID

Retrieves details of a specific contact list by its ID from SendFox.

Get Lists

Retrieve all contact lists from your SendFox account with pagination support.

List Contact Fields

Tool to list all custom contact fields defined by the user.

List Unsubscribed Contacts

Tool to retrieve a paginated list of contacts who have unsubscribed.

Unsubscribe Contact

Unsubscribe a contact from all email communications in your SendFox account.

Create Contact

Create a new contact (subscriber) in your SendFox account.

Create List

Create a new contact list in your SendFox account.

FRAMEWORKS

How to build Sendfox MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Sendfox MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Sendfox MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Sendfox MCP with Claude Code

Codex logo

Codex

Use Sendfox MCP with Codex

OpenClaw logo

OpenClaw

Use Sendfox MCP with OpenClaw

Hermes logo

Hermes

Use Sendfox MCP with Hermes

CLI logo

CLI

Use Sendfox MCP with CLI

Google ADK logo

Google ADK

Use Sendfox MCP with Google ADK

LangChain logo

LangChain

Use Sendfox MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Sendfox MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Sendfox MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Sendfox MCP with LlamaIndex

CrewAI logo

CrewAI

Use Sendfox MCP with CrewAI

FAQ

Frequently asked questions

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

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

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Karan skipped his own birthday party to fix our critical issue. It was 10pm and he diverted his Waymo to help us instead. This really sets the bar — it shows the commitment you need when users rely on your software.

Harsha Gaddipati
Harsha Gaddipati
Co-founder, Slashy

A lot of students tell us that the moment their connected tools start talking to each other inside Opennote feels almost magical. The agent just knows them, and it's immensely helped keep new users on the platform.

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Co-founder, Opennote

We chose Composio over Pipedream because it delivered depth where it mattered — niche tools and tricky edge cases other platforms simply ignored. That gave us confidence to scale without compromising.

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CEO, Zams

As a solo builder, shipping fast is life or death. The only way I can outcompete incumbents is by outmanoeuvring them. Getting bogged down managing agent auth would have been a death sentence.

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Ryan Yu
Founder, Extra Thursday

Before Composio, adding tool integrations was slow and resource-intensive. Each one could take weeks of engineering time, and maintaining them meant constantly keeping up with API changes.

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Founder & CEO, SwarmZero

With hands-on help from their founder, we integrated Gmail and Google Drive in just 30 minutes. This level of personal support and commitment is exactly what startups should strive for.

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Jerome Leclanche
Co-Founder, Ingram Technologies