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Postcoder is the API for address lookup & form validation.

What is Postcoder?

Postcoder is a hosted API that provides address lookup and form validation. It lets you quickly and seamlessly add user-friendly features like address lookup and email address validation to your websites and mobile apps.

Quick start guide

This is a great place to start if you're new to Postcoder. This guide is for developers and integrators that want to add one or more Postcoder features to their website or app.

Go to quick start

Explore Postcoder

Address lookup

Look up addresses based on a postcode, part of an address or a coordinate position. Postcoder provides access to Royal Mail PAF and Multiple Residence addresses, Ordnance Survey AddressBase property records and international addresses in over 240 countries.

Address lookup API

Security and support

Status page

Visit our status page to view current and historic availability information.

View status page