Addy offers the following address lookup, validation and cleansing services

Address & Postcode Integration

Add an address finder widget to your website that will validate addresses for accuracy against official postal address files

Address Cleansing

Match, validate and clean your existing addresses by using the Address Cleansing Excel spreadsheet

Address & Postcode Finder API

Improve your mobile apps and online services by leveraging the RESTful address finder API to locate addresses