Email verification engine

Verify email addresses with a single API call.

Reduce bounces, protect your sender reputation, and deliver to real inboxes. Fast, reliable email validation built for developers.

Get API key

Single verification API

Request

POST /v1/verify

curl -X POST
https://api.accuracy.email/v1/verify \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{"email":"john.doe@example.com"}'

Response

200 OK

{
  "email": "john.doe@example.com",
  "status": "valid",
  "syntax": true,
  "domain": true,
  "mx": true,
  "smtp": true,
  "reason": "deliverable"
}

cURLNode.jsPythonPHPJavaGoRuby.NET

Layered verification

One API. Multiple checks.

Every request runs through a layered verification pipeline, from syntax validation to live mailbox confirmation.

Syntax validation

Domain and MX check

SMTP verification

Catch-all detection

Disposable detection

Role account detection

Developer first

Integrate in minutes.

Drop a single endpoint into your stack. No heavy SDK is required.

cURLNode.jsPythonPHP

curl -X POST https://api.accuracy.email/v1/verify \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{"email":"hello@example.com"}'

Built for every workflow

Where to use it.

From signup forms to bulk list cleaning, Accuracy fits into the workflows you already use.

Signup forms
Lead capture
CRM and marketing
SaaS and platforms
Ecommerce

99.9%
Uptime: ~1.3s
Average response time: 50M+
Emails verified: 24/7
Monitoring

Answers for developers

Frequently asked questions

How does verification work?

We validate syntax, check DNS and MX records, perform a live SMTP handshake, and cross-reference disposable and role accounts.

Is there a free tier?

New accounts include 100 free verification credits so you can test the API before scaling your workflow.

Can I verify lists in bulk?

Yes. Use the bulk verification workflow for uploaded lists, or connect an asynchronous batch process to your application.

What languages do you support?

Use the REST endpoint from any language, with straightforward examples for cURL, Node.js, Python, PHP, Java, Go, Ruby, and .NET.

Start verifying with one request.

Create your account, get your API credentials, and protect every point where email enters your product.

Get your API key