AutoPostcode is a JSON HTTPS API for UK address lookup. You can make your first verified request in three steps.
Three steps to your first lookup
- Create an API key from your dashboard
- Send an authenticated GET to the lookup endpoint with a postcode
- Parse the JSON array of PAF-verified addresses and use the one selected
Next steps
Secure your integration with authentication & keys, understand rate limits, and handle problems with error handling.
Build the UI
Add a search box with the JavaScript autocomplete tutorial or in React.
Frequently asked questions
How do I make my first API request?
Create an API key in your dashboard, send an authenticated HTTPS GET to the lookup endpoint with a postcode, and read the JSON list of PAF-verified addresses.
Do I need a credit card to start?
You can create a key and test against your free allowance before choosing a paid plan.
What format is the response?
JSON — an array of structured addresses with line, town, county and postcode fields sourced from Royal Mail PAF.
Ready to get started?
Add Royal Mail PAF-verified UK address lookup to your site in minutes — start free, no card required.