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Email Validation API Capture valid email addresses from your customers

Validate email addresses with our real-time API to increase email delivery rates and eliminate hard bounces from fake or invalid email addresses.

How does the Postcoder email validation API work?

  • Your customer enters their email address on your form

    Postcoder email validation is easy to integrate into the existing user-input forms on your website or app.

  • Postcoder validates the email address in real-time

    Postcoder performs a range of live checks to verify the email address can actually receive email.

  • You capture a valid email address every time

    Postcoder lets you know whether the email is valid, and highlights typos and disposable domains.

Why use Postcoder for email validation?

  • Reduce bogus accounts

    Eliminate fake, invalid or temporary email addresses from being used to create bogus accounts.

  • Minimise funnel leaks

    Avoid losing leads or customers at registration due to accidental typos in their email address.

  • Stay connected

    Ensure your customers get the emails they want from you by validating their email address.

  • Improve checkout times

    Don't make your customers type their email address twice. Validation helps them complete your form faster.

  • Increase email deliverability

    Enhance your sender reputation and improve deliverability rates by eliminating hard bounces.

  • Reduce support overhead

    Decrease admin time spent following up with customers who missed your important email.

An optimised developer experience

Integrate email validation in minutes with Postcoder's REST API, sample code and developer-friendly documentation.

  • Javascript
  • python
  • PHP
  • C Sharp
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Having Postcoder on our checkout page has really helped ... Customers spend much less time adding their details which in turn made for a much more pleasant transaction.

Alex Woods Digital Marketing Executive at Victorian Plumbing

Free support

Postcoder is supported by our own team of experts that specialise in email validation, data quality, usability, privacy and technical integration. When you choose Postcoder, our team is your team and we're here for you if you need us, at no extra cost.

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

Perfect pricing

With great prices, flexible options and a free trial that doesn't ask for your credit card, Postcoder is the ideal API for your business.

Pay just 1.21p per email validation with our largest monthly plan or start small with a £25 pay-as-you-go credit pack.

What our customers say

Loveholidays - A customer who uses Postcoder

"It took us under a day to swap out our old system with Postcoder and we have been enjoying it ever since."

Kwifit - A customer who uses Postcoder
Sky - A customer who uses Postcoder
Sphonic - A customer who uses Postcoder

"We've been really pleased with the uptime and reliability of the service."

Kentucky Fried Chicken - A customer who uses Postcoder