How to integrate Sendfox MCP with Atomic Agent

Connect Atomic Agent to Sendfox MCP. List all active campaigns this week, unsubscribe a contact by email address, and more using natural language, with authentication handled for you.

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Api Key

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

Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including Sendfox.

This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a Sendfox account. See the Atomic Agent documentation for installation instructions.

Also integrate Sendfox with

How Atomic Agent connects to Sendfox

Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication.

Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account.

Connect Sendfox to Atomic Agent

  1. Sign up or sign in to the Composio dashboard. Copy your API key.
  2. In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart.
  3. Ask Atomic Agent to do something in Sendfox. It searches Composio for the right tool.
  4. On first use, open the sign-in link returned in the chat. Connect your Sendfox account, then return to Atomic Agent to continue.

Headless setup

Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file.

bash
COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY

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.

Use Sendfox from Atomic Agent

With your account connected, ask Atomic Agent to work with Sendfox in natural language. You can connect more apps through the same Composio integration as you need them.

Visit the Atomic Agent website or inspect the Atomic Agent source code.

Troubleshooting

Why is my API key rejected?

Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying.

Why are Composio tools unavailable after saving a key?

Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk.

Does Composio have a free plan?

The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See Composio pricing for the current limits that apply to your connection.

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.

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. Atomic Agent 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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