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OS for Developers

Start building apps and solutions with Great Britain’s most authoritative location data

With over 20,000 updates to our databases every day, you have access to a comprehensive and up-to-date set of authoritative data through the OS Data Hub.

Our APIs can be integrated with web-based apps and platforms, data science workflows or GIS software. Users can query a range of open data and premium data specific to their requirements.

Access our data APIs


Use our base maps to build detailed reference mapping.

Maps APIs

Addressing data

Search our online address database, locate addresses instantly with forward and reserve geocoding.

Addressing APIs

Geographic features

Get on-demand access to a wide range of accurate, detailed geographic features with full attribution.

Features APIs


An authentication mechanism for APIs that allows applications to use time limited tokens for access to resources.


Automate the discovery and download of OS OpenData and data packages.


Our data is readily accessible to developers and an be used with all popular web mapping libraries including Mapbox GL JS, Leaflet, OpenLayers and ArcGIS API for JavaScript.

Get started with developer tutorials and resources

OS API tutorials

Find out how we develop solutions with our APIs. Follow our step-by-step guides to start building your own innovative projects.

Code Examples

Find examples of our APIs in use. You can copy and paste the code to start building your own innovative projects.

API plans and pricing

Find the plans, understand how usage is measured, and how billing works.

Join in our developer communities


View mapping projects and collaborate with other developers using OS data.


Gain more industry insights and innovation in geospatial application development.

OS Map & Hack

Read about our first virtual hackathon, dedicated to building innovative concepts and solutions for EV charging and infrastructure.

Explore the OS Data Hub

Sign up today.