# How to integrate Sender MCP with Atomic Agent

```json
{
  "title": "How to integrate Sender MCP with Atomic Agent",
  "toolkit": "Sender",
  "toolkit_slug": "sender",
  "framework": "Atomic Agent",
  "framework_slug": "atomic-agent",
  "url": "https://composio.dev/toolkits/sender/framework/atomic-agent",
  "markdown_url": "https://composio.dev/toolkits/sender/framework/atomic-agent.md",
  "updated_at": "2026-08-11T13:05:11.301Z"
}
```

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

## Also integrate Sender with

- [OpenAI Agents SDK](https://composio.dev/toolkits/sender/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/sender/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/sender/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/sender/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/sender/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/sender/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/sender/framework/hermes-agent)
- [Google ADK](https://composio.dev/toolkits/sender/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/sender/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/sender/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/sender/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/sender/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/sender/framework/crew-ai)
- [Pydantic AI](https://composio.dev/toolkits/sender/framework/pydantic-ai)
- [AutoGen](https://composio.dev/toolkits/sender/framework/autogen)

## TL;DR

### How Atomic Agent connects to Sender
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 Sender to Atomic Agent

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

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

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `SENDER_CREATE_FIELD` | Create Field | Tool to create a new custom subscriber field in Sender.net. Use when you need to add custom fields for email personalization, segmentation, or storing additional subscriber information like company name, birthday, job title, or other custom attributes. |
| `SENDER_CREATE_OR_UPDATE_SUBSCRIBER` | Create Or Update Subscriber | Tool to create a new subscriber or update an existing one in Sender.net. Use when you need to add new subscribers to your email list or update existing subscriber information. This performs an upsert operation - creates if the email doesn't exist, updates if it does. |
| `SENDER_GET_ALL_FIELDS` | Get All Fields | Tool to retrieve a list of all custom subscriber fields configured in the Sender.net account. Use when you need to view available fields for email personalization, segmentation, or managing subscriber data. |
| `SENDER_GET_ALL_WORKFLOWS` | Get All Workflows | Tool to retrieve a list of all automation workflows in the Sender account. Use when you need to view or manage automation workflows. |
| `SENDER_GET_CAMPAIGN_BY_ID` | Get Campaign By ID | Tool to retrieve a specific campaign by its unique ID from Sender. Use when you need detailed information about a campaign including delivery metrics and engagement statistics. |
| `SENDER_GET_GROUP_BY_ID` | Get Group By ID | Tool to retrieve a specific subscriber group by its unique ID from Sender. Use when you need detailed information about a single group including subscriber counts. |
| `SENDER_GET_SUBSCRIBER_BY_EMAIL` | Get Subscriber By Email | Tool to retrieve a specific subscriber by their email address from Sender. Use when you need to fetch detailed information about a single subscriber including their status, groups, and custom fields. |
| `SENDER_GET_SUBSCRIBER_BY_ID` | Get Subscriber By ID | Tool to retrieve a specific subscriber by their unique ID from Sender. Use when you need to fetch detailed information about a single subscriber including their status, groups, and custom fields. |
| `SENDER_UPDATE_SUBSCRIBER_FIELDS` | Update Subscriber Fields | Tool to update custom fields and information for an existing subscriber in Sender.net. Use when you need to modify subscriber details such as email, first name, last name, groups, or custom fields for email personalization and segmentation. |

## 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 Sender from Atomic Agent
With your account connected, ask Atomic Agent to work with Sender 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 Sender MCP Agent with another framework

- [OpenAI Agents SDK](https://composio.dev/toolkits/sender/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/sender/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/sender/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/sender/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/sender/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/sender/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/sender/framework/hermes-agent)
- [Google ADK](https://composio.dev/toolkits/sender/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/sender/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/sender/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/sender/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/sender/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/sender/framework/crew-ai)
- [Pydantic AI](https://composio.dev/toolkits/sender/framework/pydantic-ai)
- [AutoGen](https://composio.dev/toolkits/sender/framework/autogen)

## Related Toolkits

- [Google Sheets](https://composio.dev/toolkits/googlesheets) - Google Sheets is a cloud-based spreadsheet tool for real-time collaboration and data analysis. It lets teams work together from anywhere, updating information instantly.
- [Notion](https://composio.dev/toolkits/notion) - Notion is a collaborative workspace for notes, docs, wikis, and tasks. It streamlines team knowledge, project tracking, and workflow customization in one place.
- [Airtable](https://composio.dev/toolkits/airtable) - Airtable combines the flexibility of spreadsheets with the power of a database for easy project and data management. Teams use Airtable to organize, track, and collaborate with custom views and automations.
- [Asana](https://composio.dev/toolkits/asana) - Asana is a collaborative work management platform for teams to organize and track projects. It streamlines teamwork, boosts productivity, and keeps everyone aligned on goals.
- [Google Tasks](https://composio.dev/toolkits/googletasks) - Google Tasks is a to-do list and task management tool integrated into Gmail and Google Calendar. It helps you organize, track, and complete tasks across your Google ecosystem.
- [Linear](https://composio.dev/toolkits/linear) - Linear is a modern issue tracking and project planning tool for fast-moving teams. It helps streamline workflows, organize projects, and boost productivity.
- [Jira](https://composio.dev/toolkits/jira) - Jira is Atlassian’s platform for bug tracking, issue tracking, and agile project management. It helps teams organize work, prioritize tasks, and deliver projects efficiently.
- [Clickup](https://composio.dev/toolkits/clickup) - ClickUp is an all-in-one productivity platform for managing tasks, docs, goals, and team collaboration. It streamlines project workflows so teams can work smarter and stay organized in one place.
- [Monday](https://composio.dev/toolkits/monday) - Monday.com is a customizable work management platform for project planning and collaboration. It helps teams organize tasks, automate workflows, and track progress in real time.
- [Reddit](https://composio.dev/toolkits/reddit) - Reddit is a social news platform with thriving user-driven communities (subreddits). It's the go-to place for discussion, content sharing, and viral marketing.
- [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.
- [Linkedin](https://composio.dev/toolkits/linkedin) - LinkedIn is a professional networking platform for connecting, sharing content, and engaging with business opportunities. It's the go-to place for building your professional brand and unlocking new career connections.
- [Active campaign](https://composio.dev/toolkits/active_campaign) - ActiveCampaign is a marketing automation and CRM platform for managing email campaigns, sales pipelines, and customer segmentation. It helps businesses engage customers and drive growth through smart automation and targeted outreach.
- [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.
- [Addressfinder](https://composio.dev/toolkits/addressfinder) - Addressfinder is a data quality platform for verifying addresses, emails, and phone numbers. It helps you ensure accurate customer and contact data every time.
- [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.
- [Agiled](https://composio.dev/toolkits/agiled) - Agiled is an all-in-one business management platform for CRM, projects, and finance. It helps you streamline workflows, consolidate client data, and manage business processes in one place.
- [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.
- [AimTell](https://composio.dev/toolkits/aimtell) - AimTell is a web push notification platform for managing websites, subscribers, campaigns, segments, and delivery analytics. Use it to send targeted browser notifications and measure engagement across your web push campaigns.
- [AirOps MCP](https://composio.dev/toolkits/airops_mcp) - AirOps MCP is AirOps' managed content platform exposing brand context, knowledge bases, and workflows. Use it to give agents brand-aware content, automate content workflows, and track Brand Kit edits.

## Frequently Asked Questions

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

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

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

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

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)