An address lookup API replaces the slow, error-prone multi-line address form with a single search field. Customers type a postcode or start typing their address, select the right match, and you store a clean, standardised, deliverable address.
Benefits
- Fewer fields and keystrokes at checkout — higher conversion
- Cleaner data for fulfilment, CRM and analytics
- Fewer failed deliveries and address-correction support tickets
- Official Royal Mail PAF accuracy across the whole UK
Built for any stack
Drop in the no-code plugin for WooCommerce or WordPress, or call the REST API from React, Node, PHP or anything that speaks HTTP. Every lookup is scoped to a per-website API key and fully logged.
Part of the postcode lookup hub
This page sits within our postcode lookup API hub. See also address autocomplete and UK address verification.
Frequently asked questions
What is an address lookup API?
An address lookup API lets users find and select their full address from a postcode or partial search, returning clean structured fields instead of free-typed text. AutoPostcode is backed by Royal Mail PAF.
Is the data official?
Yes — AutoPostcode uses the Royal Mail Postcode Address File (PAF), the authoritative source of UK addresses.
Can I integrate without a developer?
Yes, the WooCommerce and WordPress plugin needs no code. Developers can also use the REST API directly.
Ready to get started?
Add Royal Mail PAF-verified UK address lookup to your site in minutes — start free, no card required.