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© 2026 ZeroBounce. All rights reserved.

Download on App Store
  • Email Validation Homepage
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  • Email Validation Api
Api

Block Bad Signups with the Real-Time Email Validation API

An unprotected signup form leaves your business vulnerable to fake or even harmful data entries that jeopardize your security. With a real-time email validationⓘ API, ZeroBounce automatically detects invalid and high-risk data and blocks it from ever entering your email and user database.

Verify Email Addresses on your Web Forms in Real-Time

Name

John Doe

Email

Password

**********

API Results

Fast, secure email API service

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99.6% accuracy guaranteed

No other email checker API offers our accuracy and precision. Spot over 30 email types in bulk or real time with a money-back guarantee.

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Real-time results

ZeroBounce handles email validationⓘ in real time. As users enter their email addresses on your registration forms, we detect the email type and block or allow it accordingly.

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Rapid email verification

Our real-time verification API is almost instant. Validate a single email address in just 3 seconds. Clean your entire list in under 1 hour.

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Advanced API security

Privacy and security are the priority. We use military-grade data encryption and continuously improve our email list cleaningⓘ API validation schema to filter out bad requests.

The #1 Email Verification API for 500,000+ Clients

Why choose the ZeroBounce email validator API?

Implementing our email hygiene API gives your company the extra defense it needs against invalid and high-risk emails.

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Real-time email verification

Automatically detect low-quality emails at the point of registration on your website or landing page. Block invalid, disposable emailsⓘ, spam traps, and more. With ZeroBounce, risky emails don’t stand a chance.

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Fewer email bounces

When you keep invalid emails off your list, you can be confident that your emails will hit the inbox. The email validationⓘ API not only cleans your existing database but safeguards you against unnecessary email bounces 24/7.

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Better email marketing ROI

An API email checking service is mandatory for the modern email marketer. By proactively cleaning your emails, more of your emails reach the inbox. That means more opens, clicks, and eyes on your content.

How our email API service works

ZeroBounce email API service features

The world’s most accurate email verifier API

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Valid emails

Genuine emails

Aliases

Alternate emails

Accept-all/Catch-all email

Easily spot catch-all emailsⓘ to further validate with AI Scoring

Do not mail

Global suppression

Traps

Toxic

Mx forward

Role-based catch-all

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Invalid emails

Typos

Bad syntax

No DNS entries

Unroutable IP

Does not accept mail

Spam traps

Pristine traps

Typo traps

Recycled traps

Toxic domain verifier

Pinpoint domains that are popular for abuse and spam

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Disposable emailsⓘ

Detects temporary emails from a wide variety of disposable email providers

Abuse emails

Getting started with the email verifier API

Using our email address checker API is easy. Here’s how to get started:

  1. Create your ZeroBounce account today - Free users get 100 free monthly email verification credits and 10 Email Finder queries.
  2. Get your API key - From your user-friendly dashboard, head over to API and grab your API key. You can generate up to 5 API keys.
  3. Connect your apps - Follow our user-friendly how-to docs to set up your preferred endpoints using languages like Javascript, PHP, Kottlin, and more.
Business partners reading the ZeroBounce docs to get started with the email verification API

Email validation API pricing

Get 15% off with a ZeroBounce One™ Subscription
Email Validation / Scoring Credits

Enter your quantity. *Minimum 2,000 credits

$0.0138 per credit

Have a promo code?

$69

Enterprise? For over 1M credits Contact us

Seamless API integration with popular platforms

ZeroBounce’s list of native integrations now includes more than 50 global platforms. Take advantage of our email validationⓘ and Email Finderⓘ API with ease by adding your API key to CRMs and marketing platforms like HubSpot, Salesforce, Shopify, and more!

Check out our integrations
Collage of featured company logos that have an existing integration with your ZeroBounce email verification API key

Real-time email verification API

Validate emails instantly

Easy to install and great at keeping your data fresh! Prevent typos, known complainers, fake and poor-quality email addresses from getting on your lists. Plus, get full usage reports and insights into your email hygiene.

ZeroBounce ImageComplete software development kit (.NET, PHP, Python, Java, Swift and more)

ZeroBounce ImageIntegrates into your favorite platforms

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Explore the docs

Get started with our email API service

There’s no faster way to zero bounces

Try it Free

Get 100 free monthly credits - business or premium domain required

Discover more ZeroBounce API services

Learn more

Frequently asked questions about our email API

You can manually or automatically validate email addresses individually or in bulk by installing the ZeroBounce email verifier API.

Once you create an account and obtain your API key, you can add our API to your favorite apps, platforms, websites, or landing pages via one of our supported languages. Then, call our API, and our email validator will validate your email addresses.

Learn more about how to install the API with our

documentation

.

Making new email connections is easy with ZeroBounce

Try it Free

Get 100 free monthly credits - business or premium domain required

ZeroBounce customer smiling about her ,[object Object], results
ZeroBounce ImageBatch/Bulk email verification
ZeroBounce ImageSingle email validation
ZeroBounce ImageCustom allowlists and blocklists
ZeroBounce ImageBulk file management
ZeroBounce ImageTracking API usage
ZeroBounce ImageRetrieve credit balance

Batch/Bulk email verificationⓘ

The batch API endpoint allows you to batch up to 200 emails for cleaning simultaneously, with the ability to run up to 5 uses per minute. Get results in up to 70 seconds for each email address.

Batch endpoint docs
Woman cleaning her list on a laptop with the ,[object Object], API

The batch API endpoint allows you to batch up to 200 emails for cleaning simultaneously, with the ability to run up to 5 uses per minute. Get results in up to 70 seconds for each email address.

Batch endpoint docs

Spot known complainers and remove them to keep spam complaint rate low

At ZeroBounce, we keep pricing simple.

Cleaning emails with the email address checker API costs 1 ZeroBounce credit per email address. Use credits for AI Scoring at the cost of 1 additional credit per email per service.

You can also automatically top off your monthly credit balance and Email Finderⓘ queries with one of our convenient subscription plans.

Learn more about API pricing
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