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Postcoder delivers the fastest and most accurate way for users to fill in their address on your website and app.
Instant, intelligent address suggestions as users type any part of their address - reducing keystrokes, speeding up checkouts and cutting down on errors. Streamline the user journey and boost conversions.
GET /pcw/autocomplete/find?query=123%20foxg&country=uk...[ { "id": "20202020", "type": "ADD", "summaryline": "123 Foxglove Lane", "locationsummary": "Biddenden, Ashford, Kent, TN27 8BT", "count": 1 }, { "id": "10101010", "type": "ADD", "summaryline": "123 Foxglove Park", "locationsummary": "Weybourne, Holt, Norfolk, NR25 7HG", "count": 1 }, { "id": "30303030", "type": "ADD", "summaryline": "123 Foxglove Road", "locationsummary": "Winchburgh, Broxburn, West Lothian, EH52 6FE", "count": 1 } ]GET /pcw/autocomplete/retrieve?id=20202020&country=uk&lines=2...[ { "summaryline": "123 Foxglove Lane, Biddenden, Ashford, Kent, TN27 8BT", "addressline1": "123 Foxglove Lane", "addressline2": "Biddenden", "number": "123", "premise": "123", "street": "Foxglove Lane", "dependentlocality": "Biddenden", "posttown": "Ashford", "county": "Kent", "postcode": "TN27 8BT", "latitude": "51.1024521653", "longitude": "0.6645798746" } ]
United Kingdom 
Instant, accurate address results from any postcode or address fragment with a single search - reducing friction, minimising errors and speeding up form completion. Simplify the user journey and improve conversions.
GET /pcw/PCW45-12345-12345-1234X/address/uk/tn27%208bt?lines=2...[ { "summaryline": "123 Foxglove Lane, Biddenden, Ashford, Kent, TN27 8BT", "addressline1": "123 Foxglove Lane", "addressline2": "Biddenden", "number": "123", "premise": "123", "street": "Foxglove Lane", "dependentlocality": "Biddenden", "posttown": "Ashford", "county": "Kent", "postcode": "TN27 8BT", "latitude": "51.1024521653", "longitude": "0.6645798746" }, { "summaryline": "124 Foxglove Lane, Biddenden, Ashford, Kent, TN27 8BT", "addressline1": "124 Foxglove Lane", "addressline2": "Biddenden", "number": "124", "premise": "124", "street": "Foxglove Lane", ... }, ... ]
United Kingdom Streamline your onboarding process with fast, accurate address entry that boosts conversions and reduces errors.
Reduce typing and speeds up the user journey.
Minimise friction during onboarding and checkout.
Eliminate errors and failed deliveries.
Postcoder provides a unified view and single ground truth that you can rely on.
Validate UK addresses instantly for accurate deliveries.
Reach customers in multi-occupancy properties missed by standard PAF.
Match customers using alternative house names or historic address details.
Plan deliveries to properties before they are completed.
Deliver accurately to British Forces personnel worldwide.
Find every Irish address precisely for faster deliveries.
Link postcodes to UK geographies for better analysis.
Validate US addresses for reliable delivery and reduced returns.
Access accurate global location data with coordinates.
Postcoder and its team of address and technology specialists meet the needs of high-demand applications and rapidly growing businesses.
Built on quality management best practices you can trust.
Seamlessly handles enterprise volumes and traffic spikes.
Designed for secure, privacy-first data handling.
Proven reliability to keep your integrations running smoothly.
Our engineers are on standby 24/7 to respond to service disruptions.
Fast, reliable API performance at all times, even under load.
Connect easily with your existing tech stack.
Fast and accurate address autocomplete across all 249 countries.
Personalised setup and best-practice guidance.
Smooth transition from legacy systems or providers.
Get help via chat, email or phone - at no extra cost.
Businesses rate Postcoder 4.7 stars out of 5 on the world's most trusted software marketplace.
"Having a more simplified checkout page with the help of Postcoder has had two major benefits to our business. Faster checkouts by customers who haven't had to type in their full address, a much simpler customer journey and a major reduction in data errors; where we saw a big drop in incorrect details entered."Alex Woods Digital Marketing Executive / Victorian Plumbing
"We picked Postcoder because the API is simple to use and it supports many countries which we want to scale out to."David Annez Head of Engineering / loveholidays
"The reason we like Postcoder is that the rooftop lat/long coordinates have proven to be far more accurate than any other service and Postcoder has hugely increased our successful delivery rates."Laura Bailey E-commerce Product Manager / Pasta Evangelists
"Postcoder offers a seamless integration with our services. It is very popular with our customers."James Gutterson Commercial Manager / Signicat
"Postcoder has been great; there has been a noticeable quality increase in our campaigns. In some the pickup rate went from 30% to 60-70% and our appointment ratings for a campaign went from a 15% average to 40% for one client!"Daniel Jones IT Technician / Lead Pronto
"Postcoder is a single API that provides all the features we need... Rather than integrate several APIs, we only had to integrate one."Carl Horn Head of Digital Servicing & Customer Transformation / Capquest
"Postcoder ensures that all the address data, the mobile number and the email addresses that our customers give us are correct. It really speeds up the process for our customers."Julie Taylor Operations Director / Barrhead Travel
