Postcode lookups and address searches with a simple REST API. Accurate, complete, and always up to date.
A clean, reliable API backed by the official Royal Mail PAF database. No bloat, no complexity.
Search by postcode and get every address at that location. Full PAF data for each result.
Find addresses by name, street, town, or organisation. Flexible query parameters for any use case.
Low-latency responses so your checkout flows and forms stay fast. No waiting, no spinning.
Official Royal Mail Postcode Address File data. The most accurate and complete UK address dataset.
Pay per lookup with credit packs. No monthly fees, no contracts. Buy what you need.
RESTful JSON API with clear docs. Authenticate with a Bearer token, get structured data back.
One API key, one HTTP request, structured JSON back. That's it.
$ curl https://addresso.co.uk/api/postcodes/SW1A2AA \ -H "Authorization: Bearer ak_live_7f3x..."
{ "postcode": "SW1A 2AA", "addresses": [ { "postcode": "SW1A 2AA", "town": "London", "organisation": "House Of Commons", "building_name": "House Of Commons", "street": "", "formatted_address": "House Of Commons, ...", "latitude": 51.499619, "longitude": -0.124737 } ], "credits_remaining": 4872 }
Buy credit packs. 1 credit = 1 API call. No subscriptions, no minimums.
All prices exclude VAT (20%). Credits expire 12 months from purchase.
Get in touch for custom packs, volume discounts, dedicated support, and SLA guarantees.
Create an account, grab an API key, and start querying.