3830601 - Basic Authentication is not available in the Communication Arrangement although it is listed in the API documentation

• The API documentation in SAP Business Accelerator Hub shows that Basic Authentication is supported, However, after creating the Communication Arrangement using the Communication Scenario mentioned in the API documentation, Basic Authentication is not available under Supported Authentication Methods.
• There is a difference between the authentication methods shown in the API documentation and those available in the Communication Arrangement.

SAP S/4HANA Cloud Public Edition

The communication scenario is the authoritative source for which authentication methods are actually available in S/4HANA Cloud Public Edition.

The API Hub listing (showing Basic + X.509) reflects what the underlying service/API technically supports at the protocol level — not what the communication scenario exposes in the Communication Arrangements app.

The underlying communication scenario defines the authentication methods that are available for a communication arrangement, Which refers even if an API supports Basic Auth at the ICF/HTTP layer, if the communication scenario does not explicitly enable it, Basic Auth will not appear as an option in the Communication Arrangements app.

Steps to check 'Supported Auth. Methods' for communication scenario

1. Open the Display Communication Scenarios app.
2. Search for Example SAP_COM_1234.
3. Check the 'Supported Auth. Methods' section under 'Inbound'.
4. The value for 'Basic Authentication' is displayed as 'No', which indicates that the SAP_COM_1234 communication scenario does not support 'Basic Authentication'.

Refer to Secure Communication for Inbound Integration | SAP Help Portal

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