How to integrate Loops.so MCP with Atomic Agent

Connect Atomic Agent to Loops.so MCP. Send onboarding email to new signups, segment contacts by plan and engagement, and more using natural language, with authentication handled for you.

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Api Key

Loops.so is a modern email platform for SaaS companies to manage product, marketing, and transactional emails. It streamlines communication, so you can engage users with smarter, targeted campaigns.

12 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 Loops.so.

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 Loops.so account. See the Atomic Agent documentation for installation instructions.

Also integrate Loops.so with

How Atomic Agent connects to Loops.so

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 Loops.so 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 Loops.so. It searches Composio for the right tool.
  4. On first use, open the sign-in link returned in the chat. Connect your Loops.so 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 Loops.so MCP server, and what's possible with it?

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

Use Loops.so from Atomic Agent

With your account connected, ask Atomic Agent to work with Loops.so 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 Loops.so action and event your agent gets out of the box.

Create Contact

Tool to add a new contact to your Loops audience.

Create Contact Property

Tool to add a custom contact property to your Loops team.

Delete Contact

Tool to delete a contact by email address or user ID.

Find Contact

Tool to search for a contact by email or userId.

Get Contact Properties

Tool to retrieve a list of your account's contact properties from Loops.

Get Dedicated Sending IPs

Tool to retrieve a list of Loops' dedicated sending IP addresses.

Get Mailing Lists

Tool to retrieve all mailing lists associated with your Loops account.

List Custom Fields

Tool to retrieve a list of custom contact properties.

List Transactional Emails

Tool to retrieve a list of published transactional emails.

Send Event

Tool to send events to trigger emails in Loops.

Test API Key

Tool to test API key validity and retrieve team information.

Update Contact

Tool to update an existing contact by email or userId.

FAQ

Frequently asked questions

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

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

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