Email Validation APIv1

Validate

every email.
Instantly.

Format check + MX record lookup in milliseconds. Free, open source, and built for developers.

Format checkMX record lookup~20ms responseFree & open source
How it works3 steps

Simple by design.

01

Register

Create a free account in under 30 seconds. No credit card required.

02

Get your API key

Generate a key from your dashboard. Name it, copy it once, use it forever.

03

Call the API

POST an email address. Receive a structured result in milliseconds.

Response previewJSON

Exactly what you get back.

Every response follows the same structure — predictable, typed, and easy to handle.

Valid email
{
  "success": true,
  "data": {
    "valid": true,
    "email": "user@example.com",
    "domain": "example.com",
    "checks": {
      "format": true,
      "mx": true
    },
    "mx_records": ["mail.example.com"],
    "duration_ms": 18
  }
}
Invalid email
{
  "success": true,
  "data": {
    "valid": false,
    "email": "user@fakedomain.xyz",
    "domain": "fakedomain.xyz",
    "checks": {
      "format": true,
      "mx": false
    },
    "mx_records": [],
    "reason": "No MX records found for domain",
    "duration_ms": 22
  }
}
Frequently asked5 questions

Common questions.

Start validating
emails today.

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No credit card · Open source · Free forever

VerifexFormat check · MX record lookup · Free & open source