Top UK Post Code API alternatives in 2025

UK Post Code API, which provides access to postcode data from the Royal Mail. In this blog post, we will explore some of the best alternatives available, highlighting their features, capabilities, pricing, pros and cons, ideal use cases, and how they differ from the UK Post Code API.

1. Postcodes to Location UK API

Postcodes to Location UK API is a web service that provides developers and businesses with access to UK location data and zip codes. This API is particularly useful for applications that require address validation and geolocation services.

Key Features and Capabilities

{"latitude":"51.501009","longitude":"-0.141588"}

{"postcode":"SW1A 1AA"}

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How It Differs from UK Post Code API

2. Britain Postcode API

Britain Postcode API is designed to convert postal codes into accurate geospatial coordinates, enabling location-based services. This API is particularly beneficial for applications that require precise geographic data.

Key Features and Capabilities

{"status":1,"output":[{"postcode":"GU16 7HF","latitude":"51.314344","longitude":"-0.747971"}]}

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3. UK Property Data API

UK Property Data API provides access to comprehensive data on UK properties, including sale prices and registered leases. This API is particularly useful for real estate professionals and investors.

Key Features and Capabilities

{"property":{"address":{"paon":"2","street":"Park Drive","postcode":"HA2 7LT"},"type":"Semi Detached","estimatedCurrentValue":{"value":887632}}}

{"epc":{"currentEnergyRating":"C","potentialEnergyRating":"C"}}}

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4. Postal Code Global API

Postal Code Global API is a versatile tool that provides users with access to a vast repository of zip code data from various regions worldwide. This API is invaluable for applications that require international postcode data.

Key Features and Capabilities

{"query":{"codes":["99950"],"results":{"99950":[{"postal_code":"99950","country_code":"FI","latitude":"69.47290000","longitude":"25.95270000","city":"Karigasniemi"}]}}}

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5. Search Canadian Postal Code API

Search Canadian Postal Code API simplifies the process of finding Canadian postal codes. This API is particularly useful for applications that require Canadian address validation.

Key Features and Capabilities

{"address":"371-232 2 Nd Ave NE","city":"Kelowna","province":"BC","postal_code":"V4V 1P4"}

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6. Polish Postal Code API

Polish Postal Code API provides accurate and reliable information on Polish postal codes. This API is useful for applications that require Polish address validation.

Key Features and Capabilities

{"Result":{"Postcode":"95-110","Location":"Zgierz","Voivodeship":"Województwo łódzkie","County":"Powiat zgierski"}}

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7. Canada Postal Codes API

Canada Postal Codes API provides programmatic access to the complete set of postal codes in Canada. This API is valuable for applications that require comprehensive Canadian address data.

Key Features and Capabilities

{"City":"EDMONTON","PostCode":"T0A0H0","Province":"AB","Latitude":"53.840313","Longitude":"-113.321822"}

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How It Differs from UK Post Code API

8. Germany Postal Code API

Germany Postal Code API provides developers with access to a database of zip codes for all regions of Germany. This API is useful for applications that require German address validation.

Key Features and Capabilities

{"type":"FeatureCollection","features":[{"type":"Feature","properties":{"city":"Cloppenburg","postalcode":"49661","state":"Niedersachsen"}}]}

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9. Postal Code to State API

Postal Code to State API is a versatile tool that allows users to convert zip codes to their corresponding names or state codes. This API simplifies the process of associating zip codes with their respective states.

Key Features and Capabilities

{"state":"NY"}

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Conclusion

Postcodes to Location UK API and the Britain Postcode API stand out as top choices. For those needing property data, the UK Property Data API is an invaluable resource. Ultimately, understanding the specific requirements of your application will guide you in selecting the best API for your needs.