Category

Postcode lookup API knowledge

Everything you need to understand and implement UK postcode lookup — how the API works, how it speeds up checkout and how to add it to your site.

No card required · Royal Mail PAF-verified data

Trusted UK address intelligence

31M+
UK addresses
1.8M
Postcodes
99.9%
Uptime
PAF-verified address lookup
Fast REST API & no-code plugins
GDPR-friendly, UK-hosted

This knowledge hub collects our guides on postcode lookup and address APIs. Whether you're evaluating providers, planning an integration or optimising checkout, start with the articles below.

Ready to get started?

Add Royal Mail PAF-verified UK address lookup to your site in minutes — start free, no card required.