The Brightpearl Java SDK by Dave Morrisey is a model to understand how to interact with the API. Although is currently unsupported, developers can overview code to integrate API client, API factory, and API session.
Unleashed, online inventory management software provider, has launched a beta trial for access to its inventory management suite via the Unleashed API. A subset of Unleashed's feature set is currently available through the API. Until the entire feature set becomes available, the API will remain in beta. Unleashed has already improved the beta to include more and more of its entire feature set, and currently includes around 20 of its world class inventory management features.