1
Find
Search while they type
Send a partial address or full postcode and show up to ten relevant suggestions.
GET/address/autocomplete
0p per request
Built for UK forms
A UK address autocomplete API that finishes the form.
Help customers find a Great Britain address in a few keystrokes. Suggestions are free, then a selected address returns clean form fields, its UPRN and coordinates.
Free suggestions 35 credits per selection Monthly credit plans UPRN included
Fast to fill
Clean JSON
01
Free requestFind an address
⌘ K
Pick a fictional result to see the formatted API response.
Product preview using clearly fictional address data.
CheckoutOnboardingProperty portalsCRMLead formsDelivery
01 Less typing. Better data.
From a rough search to a usable address.
The API keeps the fast search step separate from the detailed retrieval. Your form feels quick, your data stays structured, and you only pay after a customer makes a selection.
2
Select
Let the customer choose
Each suggestion carries a signed, short-lived ID. No UPRN is exposed before selection.
12 Cedar Lane...
One clear choice
3
Retrieve
Fill every field
Return the selected address, practical address lines, postcode, UPRN and coordinates.
UPRNLAT/LNGPOSTCODE
10 API credits
02 Built for real forms
Address capture without the baggage.
Useful fields, predictable billing and a small integration surface.
Fast by design
Search freely. Pay on value.
Find requests cost nothing. A charge is made only after a valid address is successfully retrieved.
Property identity
UPRN included
Connect the chosen address to a stable property identifier and use it across your data workflow.
UPRN 100000000001example only
Location ready
Coordinates included too.
Latitude and longitude arrive with the selected record, ready for mapping and distance checks.
51.5001° N0.1001° W
Safer retrieval
Signed selection IDs
Suggestion IDs are signed, tamper-resistant and expire after 30 minutes. Keep your API key on your server.
v1.eyJ1cHJuIjo...30 min
One integration, more property data
The address can be the start of the journey.
Use the same Property Insights API key for valuations, EPCs, sold prices, boundaries, local data and more.
Browse all property APIs03 Developer friendly
Two calls. That’s the whole flow.
Search for suggestions, then retrieve the chosen result. The response maps neatly to the fields most checkout, onboarding and CRM forms already use.
- REST endpoints with JSON responses
- API key authentication
- Clear billing metadata on responses
- Manual entry can remain available
curl "https://propertyinsights.co.uk/api/v1/address/autocomplete?query=12%20Cedar&limit=6" \
-H "x-api-key: YOUR_API_KEY"
{
"success": true,
"data": [
{
"id": "v1.eyJ1cHJuIjo...signature",
"text": "12 CEDAR LANE, DEMO VILLAGE, ZZ1 1ZZ",
"postcode": "ZZ1 1ZZ"
}
],
"meta": { "count": 1, "chargeable": false }
} 200 OKFree request
04 Clear address API pricing
Pay for a completed address, not every keystroke.
Suggestions are free. A successful retrieve costs 35 API credits.
No charge for invalid or expired IDs No separate address subscription Monthly API plans: 35 credits per retrieve
See API pricing Search0pfree suggestions
API credits35per selected address
05 Compare address providers
Check the coverage and product fit before you switch.
Our comparison pages separate verified facts from product positioning, including data sources, identifiers, geographic coverage and pricing models.
06 Good to know
Address autocomplete API questions.
Need a technical answer that is not here?
Talk to usWhat does the address autocomplete API cost?
Find requests are free. A successful selected-address retrieval costs 35 API credits. Invalid, missing and expired selections are not charged.
What does a selected address return?
The retrieve response includes a canonical address, address lines, town, postcode, country code, UPRN, latitude and longitude.
Does it cover the whole UK?
The API covers postcode-bearing Ordnance Survey AddressBase Core records in England, Scotland and Wales. Northern Ireland is not currently covered, so we describe the service as Great Britain coverage.
Is this Royal Mail PAF address validation?
No. The current service uses Ordnance Survey AddressBase Core and identifies addressable properties and their UPRNs. It does not certify Royal Mail deliverability or include PAF Multiple Residence records.
Can I call it directly from the browser?
Your Property Insights API key should remain on your server. Have your frontend call a small route in your application, then make the Property Insights request from that server route.
How long can I keep a suggestion ID?
A signed suggestion ID is valid for 30 minutes. Run a fresh autocomplete search if the customer returns to the form later.
Ready? Your form, upgraded