How to integrate Maildroppa MCP with Atomic Agent

Connect Atomic Agent to Maildroppa MCP. Send newsletter to recent signups, segment subscribers by recent opens and clicks, and more using natural language, with authentication handled for you.

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Api Key

Maildroppa is an email marketing platform for managing subscribers, segmentation, newsletters, transactional email, events, and webhooks. Use it to automate campaigns, personalize messaging, and track engagement.

23 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 Maildroppa.

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 Maildroppa account. See the Atomic Agent documentation for installation instructions.

Also integrate Maildroppa with

How Atomic Agent connects to Maildroppa

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

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

Use Maildroppa from Atomic Agent

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

Archive Tag

Archive one customer-managed tag.

Count Segment Subscribers

Return the current number of subscribers matching one stored segment.

Create Segment

Create a subscriber segment from field, tag, or nested-segment conditions.

Create Subscriber

Create a subscriber without sending an opt-in message, with optional typed field values and tag assignments.

Create Subscribers

Sequentially create 1-25 subscribers without sending opt-in messages.

Create Tag

Create a customer-managed tag that can be assigned to subscribers.

Delete Segment

Permanently delete exactly one stored subscriber segment identified by an explicit segment ID.

Delete Subscriber

Permanently delete exactly one subscriber identified by an explicit subscriber ID.

Get Form Embedding

Return an active Maildroppa form's ordered input-field definition for rendering in a trusted website integration.

Get Segment

Return one stored subscriber segment and its complete filter expression by ID.

Get Subscriber

Return one Maildroppa subscriber by ID, including display field values, tag IDs, status, registration date, and GDPR agreement.

Get Tag Usage

Return subscriber assignments and archive or permanent-delete blockers for one Maildroppa tag.

List Forms

Return signup form overviews with IDs, type, status, publication state, and public routing details.

List RSS Newsletters

Return the account's RSS newsletter configurations without activating, checking, or sending them.

List RSS Sender Profiles

Return sender profiles available to RSS newsletters, including verification and delivery readiness.

List Segments

Return the account's stored subscriber segments and filter expressions.

List Subscriber Activity

Return one page of a subscriber's activity timeline with delivery eligibility and summary counts.

List Subscriber Fields

Return built-in and custom subscriber field definitions, optionally including archived custom fields.

List Subscribers

Return one page of subscribers, optionally filtered by free text, status, or structured segment conditions.

List Tags

Return account tags, optionally including archived tags.

Restore Tag

Restore an archived customer-managed Maildroppa tag so it can be assigned to subscribers again.

Update Segment

Replace a segment's name and complete filter expression.

Update Tag

Rename an existing customer-managed tag.

FAQ

Frequently asked questions

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

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

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