Email Validator MCP server

MCP Email Verify is a lightweight server that implements the Model Context Protocol (MCP) to help AI models validate email addresses. It checks email format, domain validity, and deliverability using the AbstractAPI Email Validation API, making it ideal for integration with MCP-compatible AI applications like Claude Desktop.

Requirements

• Python 3.11.0 or higher
• UV 0.6.9 or higher

Installation

1. Clone the Repository

git clone https://github.com/Abhi5h3k/MCP-Email-Verify.git
cd MCP-Email-Verify

2. Install UV

If you don't have UV installed, you can install it using the following command:

powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"

Verify the installation:

uv --version

3. Set Up the Virtual Environment

Create a virtual environment using UV:

uv venv

Activate the virtual environment:

.venv\Scripts\activate

4. Install Dependencies

Install the required dependencies:

uv install

5. Configure Environment Variables

Create a .env file in the root directory and add your AbstractAPI key:

ABSTRACT_API_KEY=your_api_key_here

You can obtain an API key from AbstractAPI's Email Validation service.

Running the Server

Start the MCP server:

uv run server.py

Using with Claude Desktop

1. Register the Server

Update the claude_desktop_config.json file to include your MCP server:

{
    "mcpServers": {
        "verify_mail": {
            "command": "uv",
            "args": [
                "--directory",
                "C:\\ABSOLUTE\\PATH\\TO\\MCP-Email-Verify",
                "run",
                "server.py"
            ]
        }
    }
}

2. Restart Claude Desktop

Restart Claude Desktop to detect the new tool.

3. Using the Email Verification

Once set up, you can ask Claude to verify emails using natural language prompts like:

"I was trying to email Thanos at [email protected] to ask him to bring back my favorite TV show, but I'm not sure if it's a valid email. Can you check if it's real or just a snap in the dark?"

The MCP server will validate the email and return results about its format, domain, and deliverability.

Available Resources

• Smithery.ai Server: MCP Email Verify
• Article: Model Context Protocol (MCP): A Beginner's Guide

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "verify_mail" '{"command":"uv","args":["--directory","C:\\ABSOLUTE\\PATH\\TO\\MCP-Email-Verify","run","server.py"]}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "verify_mail": {
            "command": "uv",
            "args": [
                "--directory",
                "C:\\ABSOLUTE\\PATH\\TO\\MCP-Email-Verify",
                "run",
                "server.py"
            ]
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

{
    "mcpServers": {
        "verify_mail": {
            "command": "uv",
            "args": [
                "--directory",
                "C:\\ABSOLUTE\\PATH\\TO\\MCP-Email-Verify",
                "run",
                "server.py"
            ]
        }
    }
}

3. Restart Claude Desktop for the changes to take effect