API documentation is publically available from the OpenSpace web site. From their site: OS OpenSpace is a free Ordnance Survey service that allows you to embed Ordnance Survey maps covering England, Scotland and Wales in your web apps. Place any kind of information that has a geographic reference on top of Ordnance Survey maps. Ordnance Survey is Great Britain's national mapping agency. The OS OpenSpace API is a piece of software code you can embed in your web application that provides all the necessary functionality to interact with a map, like panning, zooming in and out, and adding markers and polygons.
The following is a list of libraries from ProgrammableWeb's Library Directory that matched your search term. Although there many different interpretations of the word "library" among software developers, ProgrammableWeb adheres to a specific definition so as to clearly distinguish libraries from SDKs and frameworks in a way that will facilitate clean search results. In ProgrammableWeb's parlance, the term "library" is strictly used to describe a platform-specific software tool that, when installed, results in the provisioning a specific API. Conversely, SDKs are exclusively for consuming APIs and Frameworks are agnostic to specific APIs. If you think a library, SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.