Get started in 3 steps
Get your API key
Create a free account to receive 150 free credits and an API key from your dashboard. No credit card required.
Send a request
Make a single GET request to our endpoint with your API key and the email address you want to verify.
Read the response
Receive a JSON response in milliseconds with a clear status (valid, risky, or invalid) and detailed checks.
Example request and response
A single GET request returns a structured JSON response with the verification result and a breakdown of every check performed.
Request
curl -X GET "https://app.emailmarker.com/api/verify?apiKey=YOUR_API_KEY&[email protected]"Response
{
"success": true,
"result": "invalid",
"message": ""
}
// Fields:
// success - true | false (true if the API request was successful)
// result - The email status: valid, invalid, unknown
// message - The reason for the error if success == falseWhy developers choose the EmailMarker API
A standard REST endpoint that works with any language or framework, backed by a verification pipeline trusted by growing teams worldwide.
Real-time validation
Verify any email in milliseconds, perfect for signup forms, lead capture, and checkout flows.
99% accuracy rate
A 10-step verification pipeline catches invalid, fake, and risky addresses before they hit your database.
10-step verification pipeline
Syntax, domain, MX, SMTP, disposable, role-based, and catch-all checks combined in a single API call.
Disposable & catch-all detection
Identify temporary inboxes and catch-all domains so your list stays clean and your sender reputation safe.
Global SMTP coverage
Validate email addresses across every major provider and custom domain with consistent results worldwide.
Scales to 1M+ capacity
Built for high-throughput workloads, from a single signup form to bulk verification of millions of records.
Frequently asked questions
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