The AutoPostcode address API returns real UK addresses from a postcode or partial query, matched against Royal Mail PAF — around 31 million deliverable addresses across roughly 1.8 million postcodes. It uses transparent, credit-based pricing with a free tier, 99.9% uptime and sub-second responses, and integrates via REST or no-code plugins in minutes.
How much does the address API cost?
Pricing is transparent and credit-based, with a free tier to start and no enterprise lock-in. You only pay for the lookups you use — see the pricing page for current plans and credit packs.
Get an API key & test real PAF lookups
Credit packs, no monthly minimum
Volume pricing for high-traffic checkouts
What data does the API use?
Every lookup is matched against Royal Mail PAF, the official and continuously updated record of deliverable UK addresses. That's the same authoritative source used by legacy suites — see what address validation means for the full picture.
How does AutoPostcode compare to legacy providers?
| AutoPostcode | Legacy suites | |
|---|---|---|
| Data source | Royal Mail PAF | Royal Mail PAF |
| Pricing | Transparent, credit-based | Opaque, contract-heavy |
| Free tier | Yes | Rarely |
| Integration | REST + no-code plugins | Heavier setup |
How do I get started?
Start free and get an API key in minutes, then read the UK address validation API docs or browse the general FAQ.
A modern, UK-first alternative
AutoPostcode is a developer-friendly, affordable alternative to Loqate, Fetchify and Ideal Postcodes — the same Royal Mail PAF data, a faster integration and clearer pricing.
Frequently asked questions
What is an address API?
An address API is a web service that returns real UK addresses from a postcode or partial input. AutoPostcode's API matches against Royal Mail PAF — around 31 million deliverable addresses across 1.8 million postcodes — over a fast REST endpoint.
How much does the AutoPostcode address API cost?
AutoPostcode uses transparent, credit-based pricing with a free tier to start and no long lock-ins. See the pricing page for current plans; there's no minimum enterprise contract like legacy providers.
Is there a free trial for the address API?
Yes. You can start free with no card required, get an API key in minutes and test real PAF lookups before choosing a plan.
What data source does the address API use?
It uses Royal Mail's Postcode Address File (PAF), the official and continuously updated record of every deliverable UK address, so results are authoritative and current.
How do I integrate the address API?
Call the REST endpoint with your API key and a postcode or query string; you get back matching addresses as JSON. There are no-code plugins for Shopify, WooCommerce and WordPress, plus code examples for JavaScript, PHP and more.
How fast and reliable is the API?
The API is built for real-time checkout with 99.9% uptime and sub-second typical responses, so autocomplete feels instant inside your forms.
Is the address API GDPR-compliant?
Yes. Address lookups are GDPR-friendly and UK-hosted, and you only process the address data your customer chooses to enter.
How is AutoPostcode different from Loqate or Ideal Postcodes?
AutoPostcode uses the same Royal Mail PAF data but is developer-friendly and more affordable, with clearer pricing and a faster integration than legacy suites like Loqate, Fetchify and Ideal Postcodes.
Ready to get started?
Add Royal Mail PAF-verified UK address lookup to your site in minutes — start free, no card required.