Address
Postcode Lookup API
Turn any UK postcode into a list of full, PAF-verified addresses in one call.
- 31M+ Royal Mail PAF addresses
- UPRN, UDPRN & geolocation returned
- Sub-100ms typical response
Explore Postcode Lookup 1 credit per lookup
SW1
Five core products · One API key
Address & data validation APIs, built to just work
Postcode lookup, address autocomplete, phone, email and bank validation — all on a single key and shared credit pool. See exactly how each one works below.
Address
Address Autocomplete API
Predictive address search that completes a full address as your user types.
- Type-ahead suggestions from the first keystroke
- Fewer checkout fields, higher conversion
- Drop-in widget or raw JSON
Explore Address Autocomplete 1 credit per completed lookup
10
Data
Phone Validation API
Verify UK & international numbers with live network (HLR) lookups.
- Format & reachability checks
- Line type and carrier detection
- Catch fake numbers before you send
Explore Phone Validation 1–2 credits per check
+44 7
Data
Email Validation API
Confirm an inbox exists before it hits your database — with typo suggestions.
- Syntax, domain & MX record checks
- Smart typo correction (gmail.con → gmail.com)
- Reduce bounces and spam traps
Explore Email Validation 1 credit per check
hello@a
Data
Bank Validation API
Validate UK sort codes and accounts with modulus checks and Confirmation of Payee.
- Modulus validation of sort code + account
- Confirmation of Payee name matching
- Cut failed payments and fraud
Explore Bank Validation 1–10 credits per check
20-0
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One key. One credit pool. Five APIs.
Mix and match across every product with a single integration and pay only for what you use.