I Built A Free Email Validation API — Would Love Developer Feedback

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Email Validation is an API that instantly validates email addresses by checking format, MX records, disposable domains, and typos. It provides a quality score and typo suggestions, making it ideal for signup forms and email list cleaning.

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At a glance

Pricing

—

Free tier

API

Yes

Skill level

Technical

About

What is I built a free email validation API — would love developer feedback?

The Email Validation API offers instant email address validation through a single GET request. It performs comprehensive checks including RFC 5322 compliance for format, MX record verification to confirm domain email reception, and identification of disposable domains like mailinator.com. The API also intelligently detects and suggests corrections for common typos, such as 'gmial.com' to 'gmail.com'. The response includes a boolean `is_valid` flag, a `score` from 0 to 100 indicating quality, a `suggestion` for typo corrections, and a detailed `checks` breakdown. This makes it a perfect solution for enhancing signup form validation, maintaining clean email lists, and improving lead generation tools.

Best used for

Ideal for developers who need to ensure data integrity, prevent invalid signups, and maintain clean contact lists. Especially valuable for integrating into signup forms, email marketing platforms, and lead generation tools to enhance data quality and reduce bounce rates.

Common actions

validate emails

clean email lists

prevent invalid signups

improve data quality

APIdata qualityemail validationDeveloper Toolsemail verificationemail authenticationreal-time validation

Capabilities

Key features

RFC 5322 compliance check
MX record verification
Disposable domain detection
Typo detection and correction
Email quality scoring

Target Audience

developerstartup foundermarketer

Integrations

Not yet documented

Pricing & Plans

unknown

Free

FAQs

What specific checks does the Email Validation API perform?

The API performs several checks including RFC 5322 compliance for email format, MX record verification to ensure the domain can receive emails, detection of disposable email domains, and identification of common typos with suggested corrections.

What information is included in the API response?

The API response provides a boolean `is_valid` indicating overall validity, a `score` from 0 to 100 for email quality, a `suggestion` for typo corrections if detected, and a detailed `checks` object outlining the results of each validation step.

Can this API help improve lead generation efforts?

Yes, by validating email addresses at the point of entry or during list cleaning, the API helps ensure that lead generation tools collect high-quality, deliverable contacts. This reduces wasted effort on invalid emails and improves campaign effectiveness.

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