API Reference

A REST service over HTTPS, returning JSON and authenticated with an API key. Endpoints are grouped below by use case.

Authentication, rate limits, error handling, and versioning →

Address Search

Two-step typeahead address search. Find returns ranked candidates from a partial input; Resolve fetches the full address for the chosen candidate.

• Find Address
• Resolve Address

Postcode Lookup

Return all addresses at a given postcode. Powers UK postcode-lookup forms and also works for the Republic of Ireland.

• Lookup Postcode

Address Cleansing

Submit a free-form, single-line address and get back a structured, validated record.

• Cleanse Address

Account Administration

Inspect and manage your API keys, balance, and usage history.

• Key Availability
• Key Details
• Update Key Details
• Usage Stats
• Logs (CSV)

Additional Data Services

Validate phone numbers and email addresses alongside addresses.

• Phone Number Validation
• Email Validation