The Royal Mail Postcode Address File (PAF) is the definitive record of every deliverable UK address. AutoPostcode's PAF API puts that data behind a simple endpoint so you can power lookup, autocomplete and verification with data couriers actually trust.
Why use a PAF-backed API
- Authoritative data: 30M+ official UK delivery points
- Continuously updated to match Royal Mail's source
- No direct PAF licensing to manage yourself
- One endpoint for lookup, autocomplete and validation
What you get
Structured, standardised address fields ready to store, per-website API keys, full usage logging and a no-code plugin for WooCommerce and WordPress. Learn more in our complete Royal Mail PAF guide.
Part of the postcode lookup hub
See the postcode lookup API hub and PAF data access for more.
Frequently asked questions
What is a Royal Mail PAF API?
A Royal Mail PAF API exposes the official Postcode Address File — the authoritative database of 30M+ UK delivery points — over a simple HTTP interface so you can look up and verify UK addresses.
Do I need my own PAF licence?
No. AutoPostcode handles the underlying PAF access so you can integrate address lookup without managing a direct Royal Mail licence yourself.
How current is the data?
PAF is continuously maintained by Royal Mail, with thousands of address changes applied daily, and AutoPostcode reflects that authoritative source.
Ready to get started?
Add Royal Mail PAF-verified UK address lookup to your site in minutes — start free, no card required.