OS Match and Cleanse API won’t find general areas (such as ‘forest’), or perform bulk address matches in its off-the-shelf form. However, if bulk matching could be useful to you, please let us know.


OS Match and Cleanse is a RESTful API, returning queries in either XML or JSON. The ‘match’ tool is for granular matching and cleansing of existing address databases. There’s no need for any database management of AddressBase Premium itself.


The OS Match and Cleanse API accesses details of addresses in Northern Ireland, but these have a few unique characteristics due to not being derived from Address Base Premium. Addresses within Northern Ireland will not have a UPRN or status, and coordinates will be ‘0.0’ due to falling outside of the British National Grid.