Format check + MX record lookup in milliseconds. Free, open source, and built for developers.
Create a free account in under 30 seconds. No credit card required.
Generate a key from your dashboard. Name it, copy it once, use it forever.
POST an email address. Receive a structured result in milliseconds.
Every response follows the same structure — predictable, typed, and easy to handle.
{
"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
}
}{
"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
}
}No credit card · Open source · Free forever