PostcodePal provides geo-based datasets for Great Britain, Northern Ireland, and the Crown Dependencies of Guernsey, Jersey, and the Isle of Man. In addition to geographic location, available data includes streets, towns, regions, and more.
The PostcodePal API provides developer access for customers looking to incorporate features such as address lookups and distance calculations into websites and applications. Up to 100 requests per day for data without street names are free and do not require an API Key. Responses may be JSON or XML formatted.