The Intrexx Connector API defines a Java API for implementing custom Intrexx connectors that make external data available in Intrexx via an external data group. In principle, the API specifies two Java interfaces that developers should implement in order to create, read, update, and delete records and files in the external system (so-called CRUD operations). In addition, a metadata model is stored in the connector's configuration file. This describes the structure of the data groups (fields, relationships, settings) provided by the connector implementation. At runtime, the Connector API provides preconfigured clients for HTTP and OData requests that automatically perform user authentication—if required by the service—using HTTP Basic Auth or OAuth2. Furthermore, any Java library (e.g., JDBC, REST APIs, etc.) can be used in your own code.