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This blog post describes how to explore released Business Object Interfaces or RAP BO from SAP S/4HANA Cloud on SAP Business Accelerator Hub (formerly called SAP API Business Hub).

Problem Description

If Developer Extensibility with Embedded Steampunk is for ABAP Developers and technical users, then where can they find the APIs to build the extensions? Also, are there any technical documentation available for developers which they can refer to?

You will learn

  • Overview of SAP Business Accelerator Hub

  • Discover published Developer Extensibility APIs for SAP S/4HANA Cloud

  • Learn basic details of Business Object Interfaces and its technical documentation.


Developer extensibility allows you to create development projects in an SAP S/4HANA Cloud system. It gives you the opportunity to develop cloud-ready and upgrade-stable custom ABAP code on SAP S/4HANA Cloud, combining the benefits of custom ABAP code, with the required restrictions for Cloud readiness, and the SAP S/4HANA programming model to build SAP Fiori apps.

This includes:

  • ABAP RESTful Application Programming model (RAP) to build services and SAP Fiori apps

  • Eclipse based IDE (ABAP Development Tools) with debugger, troubleshooting, and testing tool support

  • ABAP software lifecycle support

To ensure Cloud readiness, you have to take into account the following restrictions:

  • Cloud-optimized subset of ABAP language

  • Usage of released SAP APIs/objects in the custom code

  • Usage of predefined extension points to extend SAP objects

  • Controlled access to admin, user, authorization, monitoring tools, and services

  • No security by default when creating your own tables, in particular, you can't use ILM (Information Lifecycle Management) and IRF (Information Retrieval Framework)

Developing extensions with Embedded Steampunk or Developer Extensibility using ADT (ABAP Development Tools) feels exactly like developing with Steampunk on BTP. With one important additional benefit: Embedded Steampunk extensions can not only call the more technical ABAP Platform interface (green), but also a local public S/4 interface containing the business functionality (e.g., CDS views like I_Product, replacing direct access to table MARA, or RAP facades for the creation of purchase orders). In S/4HANA Cloud, the custom code itself is either an own app or service, or implemented via public extension points, using the well-known BADI technology.

If you are an ABAP developer and willing to familiarize yourself with RAP, with ADT instead of SE80, or with clean APIs instead of freestyle modifications, you will feel directly at home with Embedded Steampunk. You can use all the tools and processes you already know. And these are the same tools and processes thousands of developers are using each day at SAP.

If you are new to developer extensibility, I would highly recommend to refer to the blog Developer Extensibility for SAP S/4HANA Cloud on the SAP Business Accelerator Hub before proceeding to the next section.


SAP Business Accelerator Hub acts as a central place to discover SAP S/4HANA Cloud Developer Extensibility artifacts such as Business Object Interfaces, Business Add-Ins (BAdIs) etc. available to the customer which end-users can explore, extend, and adapt SAP S/4HANA Cloud with built-in and side-by-side extension capabilities. These details can help customers or partners to search and identify available developer extensibility APIs and consume them.

Let us deep dive to see how this can be achieved:

  1. Go to SAP Business Accelerator Hub by firing below link. You would be able to land on the home page of the SAP Business Accelerator Hub.
    SAP Business Accelerator Hub:

  2. Click on product S/4HANA Cloud to see the available artifacts for SAP S/4HANA Cloud.

  3. You will see available artifacts such as APIs, Events, CDS Views, Developer Extensibility, and so on.

  4. Switch to tab Developer Extensibility, you will be able to see released Developer Extensibility APIs for SAP S/4HANA Cloud such as Business Object Interface (BO Interface). You can use the search bar to find your BO Interface.

  5. If you want to see the details about the available package, switch to Packages The short description about the package and total count of artifacts published is shown on the tile.

  6. Click on the Package tile to see BO Interfaces that belongs to that package. You would see the list of BO Interfaces available with current Cloud release. Each of the tile represents a single BO Interface.

  1. You can switch to Overview tab to see the basic details of the package and the other necessary information.
    Moreover, you can go to Documents tab to see the necessary documents and references to explore further.

  2. Click on the BO Interface tile under BO Interface tab to see more details about specific BO Interface. BO Interface main page looks as shown below:


This blog post should help you understand developer extensibility for SAP S/4HANA Cloud and explore released Business Object Interfaces from SAP S/4HANA Cloud on SAP Business Accelerator Hub.

Please feel free to contact us with any questions you may have. Thanks for reading this blog post, hopefully you enjoyed it!

Important links for further information:

  1. Developer Extensibility for SAP S/4HANA Cloud on the SAP Business Accelerator Hub

  2. Explore Business Add-Ins (BAdIs) for SAP S/4HANA Cloud on SAP Business Accelerator Hub