SaaS address autocomplete is a drop-in UK address type-ahead that product teams embed into their app's forms. As a user types, it suggests real Royal Mail PAF addresses and returns a full structured address on selection — removing manual entry and the need to maintain an address database, backed by the ~31 million UK addresses PAF holds across ~1.8 million postcodes.
How do I add address autocomplete to my SaaS product?
Bind two calls to your address input — one to suggest, one to resolve the full address — and handle the result in your form. Here's the core pattern; for a deeper build see the address autocomplete API docs.
// Drop-in address autocomplete for your SaaS form
async function suggest(query) {
const res = await fetch(
"https://api.autopostcode.com/v1/autocomplete?q=" + encodeURIComponent(query),
{ headers: { Authorization: "Bearer YOUR_API_KEY" } }
);
const { suggestions } = await res.json();
return suggestions; // [{ id, label }]
}
async function resolve(id) {
const res = await fetch("https://api.autopostcode.com/v1/address/" + id, {
headers: { Authorization: "Bearer YOUR_API_KEY" },
});
return res.json(); // { line1, line2, town, postcode }
}Why choose a drop-in autocomplete?
Because maintaining your own UK address dataset is expensive and slow. A managed, PAF-backed API keeps suggestions accurate and current while you focus on your product.
- Framework-agnostic — React, Vue, Svelte or vanilla JS
- Real PAF addresses, no dataset to maintain
- Millisecond suggestions, no layout shift
- Transparent per-lookup pricing, no minimum
Build vs buy address autocomplete
| AutoPostcode API | Build in-house | |
|---|---|---|
| Address data | Royal Mail PAF, maintained | Source and update yourself |
| Time to ship | An afternoon | Weeks |
| Accuracy | PAF-current | Drifts over time |
| Maintenance | None | Ongoing |
| Cost model | Per-lookup, no minimum | Infra + engineering |
UK-first and developer-friendly
AutoPostcode is a UK-first, PAF-backed, developer-friendly and affordable alternative to Loqate, Fetchify and Ideal Postcodes — grab a JavaScript tutorial and ship today.
Frequently asked questions
What is SaaS address autocomplete?
SaaS address autocomplete is a drop-in UK address type-ahead that product teams embed into their app's forms. As a user types, it suggests real Royal Mail PAF addresses and returns a full, structured address on selection — no manual entry and no address database to maintain.
How do I add address autocomplete to my SaaS product?
Add a lightweight script or call the REST API from your form component, bind it to your address input, and handle the selected address in your onChange. Most teams ship a working integration in an afternoon.
Does it work with React and modern frameworks?
Yes. The API returns clean JSON, so it drops into React, Vue, Svelte or plain JavaScript. You control the UI and simply call the lookup, making it framework-agnostic for any SaaS front end.
What address data powers the autocomplete?
AutoPostcode uses Royal Mail's Postcode Address File (PAF) — roughly 31 million UK delivery-point addresses across around 1.8 million postcodes — so suggestions are real, deliverable UK addresses.
How fast is the autocomplete response?
Lookups are lightweight REST calls returning JSON in milliseconds, so type-ahead suggestions feel instant even on mobile, with no measurable impact on your app's performance.
How is SaaS address autocomplete priced?
You pay per lookup with transparent pricing — no minimum spend and no expiring credits — so costs scale cleanly with your product's usage. A free API key lets you build and test before you launch.
Ready to get started?
Add Royal Mail PAF-verified UK address lookup to your site in minutes — start free, no card required.