# How to integrate Zerobounce MCP with Atomic Agent

```json
{
  "title": "How to integrate Zerobounce MCP with Atomic Agent",
  "toolkit": "Zerobounce",
  "toolkit_slug": "zerobounce",
  "framework": "Atomic Agent",
  "framework_slug": "atomic-agent",
  "url": "https://composio.dev/toolkits/zerobounce/framework/atomic-agent",
  "markdown_url": "https://composio.dev/toolkits/zerobounce/framework/atomic-agent.md",
  "updated_at": "2026-08-11T13:16:31.384Z"
}
```

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

## Also integrate Zerobounce with

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

## TL;DR

### How Atomic Agent connects to Zerobounce
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 Zerobounce to Atomic Agent

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

The Zerobounce MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Zerobounce account. It provides structured and secure access to your email validation and deliverability tools, so your agent can perform actions like validating emails, scoring leads, managing bulk jobs, and analyzing engagement—all automatically.
- Real-time email validation: Instantly check if email addresses are valid, risky, or undeliverable before sending campaigns or updating your lists.
- Bulk validation and processing: Upload files and process hundreds of emails or domains at once, with tools for tracking job status and retrieving results.
- AI-powered lead scoring: Score individual email addresses using Zerobounce AI to assess lead quality and prioritize outreach.
- Domain and pattern analysis: Identify common email address formats for any domain or run bulk domain searches to optimize your contact strategies.
- Allowlist and blocklist management: Easily update your allow and block lists to fine-tune which addresses pass or fail validation, keeping your lists clean and secure.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `ZEROBOUNCE_ACTIVITY_DATA` | Get Activity Data | Tool to get activity data (opens, clicks, etc.) for a given email. Use after confirming the email address to gauge engagement recency. |
| `ZEROBOUNCE_AI_SCORING_SINGLE` | AI Scoring Single Email | Tool to score a single email address using ZeroBounce AI. Use when you need real-time email lead quality feedback before outreach. Example prompt: "Score the email mark@gmail.com." |
| `ZEROBOUNCE_ALLOW_BLOCK_LIST` | Allow or Block List | Tool to manage allowlist and blocklist for email validation. Use when you need to programmatically add or modify custom filters before validating emails. |
| `ZEROBOUNCE_BATCH_VALIDATE_EMAILS` | Batch Validate Emails | Tool to validate a batch of email addresses in real time. Use when you need to validate up to 200 emails at once with optional activity data. |
| `ZEROBOUNCE_DELETE_AI_SCORING_FILE` | Delete AI Scoring File | Tool to remove a completed AI scoring file from ZeroBounce servers. Use when the file status is 'Complete' and you need to remove it. |
| `ZEROBOUNCE_DELETE_FILE` | Delete file | Tool to delete a file that was submitted for bulk validation. Use when file status is 'Complete'. |
| `ZEROBOUNCE_DOMAIN_SEARCH_FILE_STATUS` | Domain Search File Status | Tool to get the processing status of a file submitted for bulk domain search. Use after submitting the file to poll status. |
| `ZEROBOUNCE_DOMAIN_SEARCH_GET_FILE` | Domain Search Get File | Tool to download the results file for a completed bulk domain search job. Use when you have the file_id and the job is complete. |
| `ZEROBOUNCE_DOMAIN_SEARCH_SEND_FILE` | Domain Search Send File | Tool to upload a file for bulk domain search. Use when you have many domains in a CSV/TXT and need to lookup their details in bulk. |
| `ZEROBOUNCE_DOMAIN_SEARCH_SINGLE` | Domain Search Single | Tool to identify common email address formats for a given domain. Use when you need to guess email patterns for a company based on its domain. |
| `ZEROBOUNCE_EMAIL_FINDER_DELETE_FILE` | Delete Email Finder File | Tool to delete a file that was submitted for bulk email finding. Use when the file processing status is 'Complete' and you need to remove it. |
| `ZEROBOUNCE_EMAIL_FINDER_FILE_STATUS` | Email Finder File Status | Tool to get the processing status of a file submitted for bulk email finding. Use when you need to poll the progress of a bulk email-finder file upload. |
| `ZEROBOUNCE_EMAIL_FINDER_SEND_FILE` | Email Finder Send File | Tool to upload a file for bulk email finding. Use when you have lists of names and domains to find emails in bulk via CSV/TXT upload. |
| `ZEROBOUNCE_GET_API_USAGE` | Get API Usage | Tool to retrieve API usage statistics for a given period. Use when you need usage metrics between two dates. |
| `ZEROBOUNCE_GET_CREDIT_BALANCE` | Get Credit Balance | Tool to retrieve your current ZeroBounce email validation credit balance. Use when you need to monitor remaining credits to avoid service interruptions. |
| `ZEROBOUNCE_GET_EMAIL_FINDER_FILE` | Get Email Finder File | Tool to download the results file for a completed bulk email finder job. Use when you have the file_id and the job is complete. |
| `ZEROBOUNCE_LIST_EVALUATOR` | List Evaluator | Tool to evaluate the quality of an email list. Use when you have a list of emails and need a quick health check before full validation. |
| `ZEROBOUNCE_LIST_FILTERS` | List Filters | Tool to retrieve all email addresses and domains in your allowlist and blocklist filters. Use when you need to view or audit current filter rules before validation. |
| `ZEROBOUNCE_SEND_FILE` | Send File | Tool to upload a file for bulk email validation. Use when you need to validate large lists of emails via CSV or TXT file. |
| `ZEROBOUNCE_VALIDATE_EMAIL` | Validate Email | Tool to validate a single email address in real time. Use when you need to confirm deliverability and domain details before sending emails. Each call consumes API credits; set `credits_info: true` to include remaining balance in the response and monitor before credits are exhausted. |

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

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

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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.
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## Frequently Asked Questions

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

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

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

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

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