About
Abstract API’s Email Validation and Verification API provides real-time email verification designed to help teams reduce bounce rates, clean signup forms, and improve the quality of inbound leads. It validates email addresses through a single REST API and returns structured JSON responses that support fast, automated decision-making.
The service checks core deliverability signals such as syntax, MX records, SMTP validity, disposable domains, catch-all behavior, and typo detection. It also offers deeper enrichment and risk insights on higher plans, including sender details, domain intelligence, quality scoring, and breach-related signals.
- Real-time email validation via REST API
- Syntax, MX, SMTP, and deliverability checks
- Disposable, free email, role email, and catch-all detection
- Quality scoring and risk signals on advanced plans
- Bulk validation support and integration-friendly workflows
- Compliance-focused infrastructure with SOC 2 and GDPR positioning
What's included in the free tier
- Email deliverability checks for assessing whether an address can receive mail.
- Email sender details for identifying the person or organization behind an address.
- Email domain details for reviewing domain-related information.
- Email quality scoring for evaluating overall email quality.
- Email risk assessment for spotting risky addresses and domains.
- Email breaches data for checking whether an email appears in breach records.
- 100 requests per month included on the free plan.
- 3 requests per second rate limit on the free plan.
See Abstract Email Validation API pricing for current limits.
