Email validation Illustration

Email Validation API Confirm and correct email addresses with one click

Ensure data quality and create the best user experience.

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Email validation that's simple for users

Stop making your customers type their email twice. Our API will check if the email address is deliverable.

Simple and straightforward for users
Email address quality score

Instant quality score

Our API returns a quality score for the input address. You can set parameters on what to accept.

We detect disposable email address servers and "catch all" domains.

No verification emails required

Our API works in the background with no inconvenience or additional verification from your customer. We check deliverability without ever sending an email.

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GDPR compliant

Validation requests are encoded automatically. Customer data is kept completely anonymous.

Email validation is GDPR compliant
One-click typo corrections

Correct typos in one click

Our API intelligently recognises mistakes or typos and recommends possible fixes. Users can fix their mistake with a single click.

A simple REST API

API keys are used for authentication and results are returned in JSON and XML formats.

Developer Docs
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<EmailValidation xmlns:xsd="" xmlns:xsi="">
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Our web developers have found it simple to set up, and there is extremely little maintenance required in the upkeep.

Alex Woods
Digital Marketing Executive at Victorian Plumbing
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Free support

Our sales and support teams are with you every step of the way.
We listen carefully and communicate honestly.
We don't use scripts or automated call systems.
We have real people ready to help when you need it.

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Tracking usage

Understanding how your account is being used is important, so we make it easy for you. You can view usage reports, configure email alerts and check your remaining credit balance.

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Postcoder Pricing


We have payment options to suit every type of business, from pay-as-you-go credit packs to monthly plans to high volume licences.

The more lookups you buy, the lower the price per lookup.

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What our customers say

Netdespatch - A customer who uses Postcoder

"Allies help us maintain a level of service that is always there for our 120,000 business customers."

Smyths Toys - A customer who uses Postcoder
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Prezzybox - A customer who uses Postcoder

"2x faster checkout times - Postcoder has literally transformed our checkout."

KFC - A customer who uses Postcoder
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