This chapter provides details and guidance about how to use OpenAPI resources. OpenAPI is divided into different service groups -- a collection of related services. In the service groups some resources are request/response style interactions and others require a connection to the streaming server, then setting up a subscription. Make sure to understand these concepts before diving in to the specifics of each service group.

Before reading documentation for the individual service groups we recommend reading about Core Business Concepts in the API to understand how asset types are defined and orders work.