Email Validation

Overview

Abstract’s Email Validation API checks deliverability — syntax, MX records, SMTP reachability, disposable domains, and abuse/risk signals — with a generous free tier. Auth is an API key (an invalid key returns 401, verified).

Quick Start

Validate (replace YOUR_KEY):

curl "https://emailvalidation.abstractapi.com/v1/?api_key=YOUR_KEY&[email protected]"

{
  "email": "[email protected]",
  "autocorrect": "",
  "deliverability": "DELIVERABLE",
  "quality_score": "0.95",
  "is_valid_format": { "value": true },
  "is_disposable_email": { "value": false },
  "is_smtp_valid": { "value": true },
  "is_free_email": { "value": true }
}

Authentication

• Register at abstractapi.com → free API key (emailed).
• Send it as the api_key query parameter (invalid key → 401, verified).

Rate Limits & Notes

• Free tier: 100 validations/month (check current docs); paid plans scale.
• Key fields: deliverability (DELIVERABLE/UNDELIVERABLE/RISKY), quality_score (0-1), is_smtp_valid, is_disposable_email.
• Batch verification and webhooks are available on paid tiers.

FAQ

Is Abstract’s Email Validation free? Free tier: 100 validations/month; more is paid.

How do I get a key? Register at abstractapi.com — the key is emailed.

What’s the key field? deliverability tells you if the address is reachable.