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
Free Tier Value
The page explicitly shows a Free plan at $0/month with 100 requests and 3 requests/second, and the cheapest paid plan is Starter at $17/month. Because this is a capped free tier, the conservative FTV signal is the lowest paid plan price that exceeds the free cap, which is $17/month. No credit amount or trial duration is shown, and the page explicitly says “No credit card required,” so no_cc_required is true.
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.
Paid plans
Starter
- requests / year
- 60,000
- requests / second
- 3
- Email deliverability
- Domain whitelisting
- Bulk CSV upload
- full API response
Standard
- requests / year
- 60,000
- requests / second
- 3
- Email deliverability
- Email sender
- Email domain
- Domain whitelisting
- Bulk CSV upload
- full API response
Professional
- requests / year
- 60,000
- requests / second
- 3
- Email deliverability
- Email sender
- Email domain
- Email quality
- Email risk
- Email breaches
- Domain whitelisting
- Bulk CSV upload
Enterprise
- requests / month
- Flexible
- requests / second
- Flexible
- Email deliverability
- Email sender
- Email domain
- Email quality
- Email risk
- Email breaches
- Commercial license
- SOC 2 & GDPR
Pricing extracted from Abstract Email Validation API's pricing page. Always verify current pricing before committing.
