ValidKit Email Validation

by ValidKit

284 downloads

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GitHub Website

About

MCP server for ValidKit email validation. Works with Claude Code, Cursor, Windsurf, and any MCP-compatible AI assistant

Details

Author: ValidKit
Downloads: 284
Categories: Communication, Developer Tools

Setting up with Highlight

This MCP is not yet compatible with Highlight’s one-click setup. However, you can still use it with Highlight by following these steps:

Download and install Highlight from highlightai.com/download
Navigate to the plugins tab and select "Add Custom Plugin"
Configure the plugin with the settings below

Plugin Name ValidKit Email Validation

Command (node, npx, python, etc.)

Please refer to the README for specific instructions on how to obtain API keys or other required environment variables.
Enable "Start Automatically" if you want the plugin to start when Highlight launches

Setting up with Cursor

Open Cursor's settings
Navigate to the MCP section
Click "Add new Global MCP server"
Copy and paste the configuration below based on your operating system

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

Setting up with Claude Desktop

Open Claude Desktop's settings
Go to the Integrations tab
Click "Add MCP Server"
Use the configuration below based on your operating system

Note: Make sure Claude Desktop is running before attempting to connect.

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

Setting up with Windsurf

Open Windsurf's preferences
Go to the Integrations section
Click "Add MCP Integration"
Use the configuration below based on your operating system

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

Setting up with Cline

Open Cline's settings
Navigate to the Integrations section
Click "Add MCP Server"
Copy and paste the configuration below based on your operating system

Note: Make sure to restart Cline after adding the configuration.

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

Setting up with Goose

Open Goose's preferences
Go to the Integrations tab
Select "MCP Servers"
Click "Add New Server"
Use the configuration below based on your operating system

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

JSON

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

From the repository

Install by adding the server configuration to your MCP client (Claude Code, Cursor, Windsurf, or Claude Desktop) using npx -y @validkit/mcp-server and setting the VALIDKIT_API_KEY environment variable. Invoke tools like validate_email, validate_emails_bulk, or check_usage via natural language commands.

`validate_email`

Validate a single email address. Returns deliverability status, syntax/DNS/MX checks, disposable/role/free detection, and typo suggestions.

`validate_emails_bulk`

Validate multiple email addresses in a single request (up to 1000). Returns individual results and a summary with valid/invalid/unknown counts.

`check_usage`

Check your ValidKit API usage stats for the current period. Returns total requests, valid/invalid counts, average response time, and rate limit.

Claude Desktop / Cursor

Paste into your MCP client config file to install this server.

{
    "mcpServers": {
        "validkit email validation": {
            "validkit": {
                "command": "npx",
                "args": [
                    "-y",
                    "@validkit/mcp-server"
                ],
                "env": {
                    "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
                }
            }
        }
    }
}

McpServers

{
    "validkit": {
        "command": "npx",
        "args": [
            "-y",
            "@validkit/mcp-server"
        ],
        "env": {
            "VALIDKIT_API_KEY": "<YOUR_API_KEY>"
        }
    }
}

ValidKit MCP Server

Model Context Protocol (MCP) server for ValidKit email validation. Validate emails directly from Claude Code, Cursor, Windsurf, and any MCP-compatible AI assistant -- syntax checks, MX record verification, disposable detection, and typo suggestions, all without leaving your editor.

Setup

Claude Code

claude mcp add validkit -e VALIDKIT_API_KEY=vk_your_api_key -- npx -y @validkit/mcp-server

Cursor

Add to .cursor/mcp.json:

{
  "mcpServers": {
    "validkit": {
      "command": "npx",
      "args": ["-y", "@validkit/mcp-server"],
      "env": {
        "VALIDKIT_API_KEY": "your_key"
      }
    }
  }
}

Windsurf

Add to ~/.codeium/windsurf/mcp_config.json:

{
  "mcpServers": {
    "validkit": {
      "command": "npx",
      "args": ["-y", "@validkit/mcp-server"],
      "env": {
        "VALIDKIT_API_KEY": "your_key"
      }
    }
  }
}

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "validkit": {
      "command": "npx",
      "args": ["-y", "@validkit/mcp-server"],
      "env": {
        "VALIDKIT_API_KEY": "your_key"
      }
    }
  }
}

Get Your API Key

Tools

`validate_email`

Validate a single email address. Returns deliverability status, syntax/DNS/MX checks, disposable/role/free detection, and typo suggestions.

"Validate the email user@example.com"

`validate_emails_bulk`

Validate up to 1,000 emails in one request. Returns individual results and summary counts.

"Validate these emails: alice@gmail.com, bob@company.co, test@fake.xyz"

`check_usage`

Check your API usage stats — total requests, valid/invalid counts, average response time, and rate limit.

"Show my ValidKit usage stats"

Environment Variables

| Variable | Required | Description |
|----------|----------|-------------|
| VALIDKIT_API_KEY | Yes | Your ValidKit API key |
| VALIDKIT_API_URL | No | Custom API URL (default: https://api.validkit.com) |

Testing with MCP Inspector

VALIDKIT_API_KEY=vk_test_... npx @modelcontextprotocol/inspector npx -y @validkit/mcp-server

Links

- ValidKit Homepage
- API Documentation
- GitHub Repository
- npm Package
- MCP Protocol

License

MIT

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About

Details

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Setting up with Highlight

From the repository

validate_email

validate_emails_bulk

check_usage

Claude Desktop / Cursor

McpServers

ValidKit MCP Server

Setup

Claude Code

Cursor

Windsurf

Claude Desktop

Get Your API Key

Tools

validate_email

validate_emails_bulk

check_usage

Environment Variables

Testing with MCP Inspector

Links

License

Install

More like this

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Context 7

`validate_email`

`validate_emails_bulk`

`check_usage`

`validate_email`

`validate_emails_bulk`

`check_usage`