UK Postcode & Address API for Developers

A simple JSON API to query UK postcodes and addresses

The most up-to-date & accurate UK dataset available

Updated daily from Royal Mail's Postcode Address File

Starts at 2p per lookup & open data is free

Sign Up for Free Find out more

Simply Priced

Worry-free pricing with no hidden costs or lock-in. A flat, pay-as-you-go rate of 2p per lookup

Incredibly Accurate

Access the UK's most accurate and up-to-date address database. Our data is updated everyday from Royal Mail's Postcode Address File

Well Supported

Integrate quickly with clear documentation, open-source libraries and live support from developers

Access the national address database through a simple API
Query for UK addressing data with just an HTTP request

GET /v1/postcodes/


GET /v1/addresses?q=


GET /v1/autocomplete/addresses?q=


Integrate postcode lookups with any form in moments
Add postcode lookups to any web form by embedding and configuring our jQuery Plugin

<!-- Add a div to house your 
     postcode input field -->
<div id="lookup_field"></div>

<!-- This is your existing form -->
<label>Address Line One</label>
<input id="first_line" type="text">

<label>Address Line Two</label>
<input id="second_line" type="text">

<label>Address Line Three</label>
<input id="third_line" type="text">

<label>Post Town</label>
<input id="post_town" type="text">

<input id="postcode" type="text">
// Add this after your form
  // Add your API key
  api_key: 'ak_hk71kco54zGSgVf9ExxRVVNmolLNh',
  // Identify your fields with CSS selectors
  output_fields: {
    line_1: '#first_line',  
    line_2: '#second_line',         
    line_3: '#third_line',
    post_town: '#post_town',
    postcode: '#postcode'

Demonstrations limited to 15 lookups per IP, per day

Trusted by developers
We work with developers across small businesses and startups through to public and FTSE 100 organisations


1,000+ Users
and Growing

Our APIs provide addressing and location data for over 1,000 users

Over 1 Million Requests
Processed per Week

Millions of requests are processed by our APIs every month without a hitch

Over 29 Million Addresses,
1,000s Updated Daily

Our data is updated everyday with up to 5,000 changes per day

Get up and running in mere moments

Sign Up for Free

Got a question? Chat to us on Or phone us on (+44) 0845 862 0898