Postcodes.io
UK postcode & geolocation API, serving up open data
Postcodes.io is an open-source HTTP API for querying UK postcode and geolocation data. It serves information derived from datasets including the ONS Postcode Directory, Ordnance Survey Open Names, and the Scottish Postcode Directory. Developers can retrieve administrative and geographic details for individual postcodes and outward codes. The API also supports postcode search, autocomplete, reverse geocoding, nearest-postcode queries, and lookups for terminated postcodes. ...