Paste in your Ideal Postcodes API key. We’ll attach a verified Royal Mail PAF address and its UPRN to whatever you type. Everything runs in your browser; your key never leaves this tab.
The cleanser uses api.ideal-postcodes.co.uk to fetch real postal addresses. That needs a key. We don’t proxy or store it - it stays in your browser’s localStorage and is sent directly to ideal-postcodes.co.uk from this page.
Don’t have a key? Start a 30-day free trial at ideal-postcodes.co.uk.
Ideal Postcodes runs the cleansing infrastructure behind this widget. Get an API key, drop it into your form, and we’ll return verified PAF addresses + UPRNs over HTTP.