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atdata-email-verification-mcp-server

AtData SafeToSend MCP Server

A Model Context Protocol (MCP) server that provides email verification services using AtData's SafeToSend API. This server allows you to verify email addresses to filter out invalid and high-risk ones, resulting in higher open rates, clicks, and conversions.

https://docs.atdata.com/reference/safe-to-send

Features

  • Email Verification: Verify individual email addresses using AtData's SafeToSend API
  • Batch Verification: Verify multiple email addresses at once with summary statistics
  • Comprehensive Error Handling: Detailed error messages for different failure scenarios
  • Environment Variable Support: Secure API key management through environment variables
  • Rate Limiting Awareness: Proper handling of API rate limits

Installation

  1. Clone this repository:
git clone <repository-url> cd atdata-mcp-server
  1. Install dependencies using uv (recommended) or pip:
# Using uv uv sync # Using pip uv pip install .

Setup

Get AtData API Key

  1. Sign up for an AtData account at https://atdata.com
  2. Obtain your API key from the AtData dashboard
  3. Set up your API key as an environment variable:
export ATDATA_API_KEY="your-api-key-here"

Or create a .env file in the project root:

ATDATA_API_KEY=your-api-key-here

Usage

Running the Server

Method 1: Direct Python execution
python server.py
Method 2: Using FastMCP CLI
fastmcp run server.py
Method 3: Install for Claude Desktop
fastmcp install server.py
Using with uv

If you're using uv, you can also run the server with:

{ "mcpServers": { "atdata-email-verification-mcp-server": { "command": "uv", "args": ["run", "python", "server.py"], "cwd": "/path/to/your/atdata-email-verification-mcp-server", "env": { "ATDATA_API_KEY": "your_api_key_here" } } } }

Available Tools

1. verify_email

Verify a single email address.

Parameters:

  • email (string, required): The email address to verify
  • api_key (string, optional): AtData API key (uses environment variable if not provided)

Example:

{ "email": "user@example.com", "api_key": "your-api-key" # Optional if ATDATA_API_KEY is set }

Response:

{ "success": True, "email": "user@example.com", "verification_result": { "email": "user@example.com", "status": "valid", "deliverable": True, "risk_level": "low", # Additional verification details from AtData API } }
2. batch_verify_emails

Verify multiple email addresses in batch.

Parameters:

  • emails (array of strings, required): List of email addresses to verify
  • api_key (string, optional): AtData API key (uses environment variable if not provided)

Example:

{ "emails": ["user1@example.com", "user2@domain.com", "invalid@email"], "api_key": "your-api-key" # Optional if ATDATA_API_KEY is set }

Response:

{ "results": [ { "success": True, "email": "user1@example.com", "verification_result": { /* verification details */ } }, { "success": True, "email": "user2@domain.com", "verification_result": { /* verification details */ } }, { "error": "Bad request. Please check the email format.", "email": "invalid@email", "status_code": 400 } ], "summary": { "total": 3, "successful": 2, "failed": 1, "success_rate": 66.67 } }

Error Handling

The server provides comprehensive error handling for various scenarios:

  • Missing API Key: Returns error when no API key is provided
  • Authentication Errors: Handles invalid API keys (401 status)
  • Bad Requests: Handles invalid email formats (400 status)
  • Rate Limiting: Handles API rate limit exceeded (429 status)
  • Network Issues: Handles connection errors and timeouts
  • Unexpected Errors: Catches and reports any unexpected exceptions

API Documentation

This server is based on the AtData SafeToSend API. For more details about the underlying API, see:

Development

Project Structure

atdata-mcp-server/ ├── src/ │ └── server.py # Main MCP server implementation ├── pyproject.toml # Project configuration and dependencies ├── uv.lock # Locked dependencies └── README.md # This file

Contributing

  1. Fork the repository
  2. Create a feature branch
  3. Make your changes
  4. Add tests if applicable
  5. Submit a pull request

License

This project is licensed under the MIT License. See the LICENSE file for details.

Support

For issues related to:

  • This MCP Server: Open an issue in this repository
  • AtData API: Contact AtData support or check their documentation
  • FastMCP Framework: Check the FastMCP documentation
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atdata-email-verification-mcp-server

  1. Features
    1. Installation
      1. Setup
        1. Get AtData API Key
      2. Usage
        1. Running the Server
        2. Available Tools
      3. Error Handling
        1. API Documentation
          1. Development
            1. Project Structure
          2. Contributing
            1. License
              1. Support

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