# How to integrate Beehiiv MCP with Atomic Agent

```json
{
  "title": "How to integrate Beehiiv MCP with Atomic Agent",
  "toolkit": "Beehiiv",
  "toolkit_slug": "beehiiv",
  "framework": "Atomic Agent",
  "framework_slug": "atomic-agent",
  "url": "https://composio.dev/toolkits/beehiiv/framework/atomic-agent",
  "markdown_url": "https://composio.dev/toolkits/beehiiv/framework/atomic-agent.md",
  "updated_at": "2026-08-27T05:33:39.490Z"
}
```

## 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 Beehiiv.
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 Beehiiv account. See the [Atomic Agent documentation](https://atomicagent.io/docs/?cta_placement=atomic-agent-docs) for installation instructions.

## Also integrate Beehiiv with

- [ChatGPT](https://composio.dev/toolkits/beehiiv/framework/chatgpt)
- [Claude Cowork](https://composio.dev/toolkits/beehiiv/framework/claude-cowork)
- [Hermes](https://composio.dev/toolkits/beehiiv/framework/hermes-agent)

## TL;DR

### How Atomic Agent connects to Beehiiv
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 Beehiiv to Atomic Agent

### Connect Beehiiv to Atomic Agent
- Sign up or sign in to the [Composio dashboard](https://dashboard.composio.dev/?cta_placement=atomic-agent-api-key). Copy your API key.
- 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.
- Ask Atomic Agent to do something in Beehiiv. It searches Composio for the right tool.
- On first use, open the sign-in link returned in the chat. Connect your Beehiiv 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 Beehiiv MCP server, and what's possible with it?

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

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `BEEHIIV_CREATE_DRAFT_POST` | Create Draft Post | Create an unscheduled draft post from HTML content. This tool never confirms, publishes, schedules, or sends the post. Beehiiv creates posts asynchronously; the returned ID is stable while background creation finishes. |
| `BEEHIIV_CREATE_SEGMENT` | Create Segment | Create an audience segment from explicit subscription IDs, explicit emails, or custom-field rules; returns the segment and its initial calculation status. |
| `BEEHIIV_CREATE_SUBSCRIPTION` | Create Subscription | Create a new publication subscription without reactivating an unsubscribed address or sending a welcome email; supports attribution, initial custom fields, and newsletter-list assignment. |
| `BEEHIIV_LIST_CUSTOM_FIELDS` | List Custom Fields | List the custom-field definitions available for subscriber metadata and dynamic audience segments in a publication, returning one page controlled by page and limit with pagination metadata for retrieving additional fields. |
| `BEEHIIV_LIST_POSTS` | List Posts | Search a publication's posts by status, audience, channel, slug, tags, or author and optionally include content, recipients, or statistics. |
| `BEEHIIV_LIST_PUBLICATIONS` | List Publications | List publications accessible to the API key, optionally including publication statistics; use the returned publication IDs with publication-scoped tools. |
| `BEEHIIV_LIST_SEGMENT_MEMBERS` | List Segment Members | List full subscriber records currently included in an audience segment, optionally including stats, custom fields, referrals, tags, or premium tiers. The response contains subscriber PII. |
| `BEEHIIV_LIST_SEGMENTS` | List Segments | List audience segments in a publication, filtered by segment type or calculation status, with optional latest statistics. |
| `BEEHIIV_LIST_SUBSCRIPTIONS` | List Subscriptions | Search a publication's subscriptions by exact email or filter by status and tier, returning one cursor-controlled page of subscriber records. |
| `BEEHIIV_UPDATE_DRAFT_POST` | Update Draft Post | Update content or presentation settings on an existing draft after verifying it is still a draft; refuses confirmed, archived, or sent posts and cannot publish or schedule. |
| `BEEHIIV_UPDATE_SUBSCRIPTION_CUSTOM_FIELDS` | Update Subscription Custom Fields | Set or remove custom-field values on one subscription without changing its email, tier, billing link, or subscribed status. |

## Supported Triggers

None listed.

## 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](/pricing) for the current limits that apply to your connection.

## Complete Code

None listed.

## Conclusion

### Use Beehiiv from Atomic Agent
With your account connected, ask Atomic Agent to work with Beehiiv in natural language. You can connect more apps through the same Composio integration as you need them.
Visit the [Atomic Agent website](https://atomicagent.io/?cta_placement=atomic-agent-site) or inspect the [Atomic Agent source code](https://github.com/AtomicBot-ai/atomic-agent?cta_placement=atomic-agent-repo).

## How to build Beehiiv MCP Agent with another framework

- [ChatGPT](https://composio.dev/toolkits/beehiiv/framework/chatgpt)
- [Claude Cowork](https://composio.dev/toolkits/beehiiv/framework/claude-cowork)
- [Hermes](https://composio.dev/toolkits/beehiiv/framework/hermes-agent)

## Related Toolkits

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- [Facebook](https://composio.dev/toolkits/facebook) - Facebook is a social media and advertising platform for businesses and creators. It helps you connect, share, and manage content across your public Facebook Pages.
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- [ActiveTrail](https://composio.dev/toolkits/active_trail) - ActiveTrail is a user-friendly email marketing and automation platform. It helps you reach subscribers and automate campaigns with ease.
- [Adobe Marketing Agent MCP](https://composio.dev/toolkits/adobe_marketing_agent_mcp) - Adobe Marketing Agent MCP is Adobe's hosted MCP service that exposes marketing context, preferences, and agent capabilities. Use it to provide agents with campaign, audience, and analytics context via a managed integration.
- [Ahrefs](https://composio.dev/toolkits/ahrefs) - Ahrefs is an SEO and marketing platform for site audits, keyword research, and competitor insights. It helps you improve search rankings and drive organic traffic.
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- [Amcards](https://composio.dev/toolkits/amcards) - AMCards lets you create and mail personalized greeting cards online. Build stronger customer relationships with easy, automated card campaigns.
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- [Benchmark email](https://composio.dev/toolkits/benchmark_email) - Benchmark Email is a platform for creating, sending, and tracking email campaigns. It's built to help you engage audiences and analyze results—all in one place.
- [Bigmailer](https://composio.dev/toolkits/bigmailer) - BigMailer is an email marketing platform for managing multiple brands with white-labeling and automation. It helps teams streamline campaigns and simplify integration with Amazon SES.
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- [BlueFox Email](https://composio.dev/toolkits/bluefox_email) - BlueFox Email is an email API for managing contacts, subscriber lists, and sending transactional and triggered messages. Use it to reliably send transactional and triggered emails and manage subscribers at scale.
- [Brandfetch](https://composio.dev/toolkits/brandfetch) - Brandfetch is an API that delivers company logos, colors, and visual branding assets. It helps marketers and developers keep brand visuals consistent everywhere.
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- [Brevo](https://composio.dev/toolkits/brevo) - Brevo is an all-in-one email and SMS marketing platform for transactional messaging, automation, and CRM. It helps businesses engage customers and streamline communications through powerful campaign tools.
- [Buffer](https://composio.dev/toolkits/buffer) - Buffer is a social media management platform for planning, creating, scheduling, and publishing posts across connected channels. It helps teams keep content organized and publish consistently without jumping between social apps.
- [BulkPublish](https://composio.dev/toolkits/bulkpublish) - BulkPublish is a social media publishing platform for managing scheduled content across multiple channels. It helps teams plan campaigns, publish consistently, and track performance in one place.
- [Campayn](https://composio.dev/toolkits/campayn) - Campayn is an email marketing platform for creating, sending, and managing campaigns. It helps businesses engage contacts and grow audiences with easy-to-use tools.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Beehiiv MCP?

With a standalone Beehiiv MCP server, the agents and LLMs can only access a fixed set of Beehiiv tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Beehiiv and many other apps based on the task at hand, all through a single MCP endpoint.

### Can I use Tool Router MCP with Atomic Agent?

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 Beehiiv tools.

### Can I manage the permissions and scopes for Beehiiv while using Tool Router?

Yes, absolutely. You can configure which Beehiiv 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.

### How safe is my data with Composio Tool Router?

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 Beehiiv data and credentials are handled as safely as possible.

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