Is there a way to view a list of SAP interfaces such as RFC, BAPI and ALE?
Yes, you can use the RFC "RFC_FUNCTION_SEARCH" to retrieve a list of all available functions in SAP. I believe this RFC is available only from NetWeaver 7 and beyond, but it may be available on earlier versions of core SAP. When you use this function, be sure to qualify your search by function name, so that if you would like a list of all available RFCs in the system, search by "RFC*".
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Related Q&A from Austin Sincock
Explaining the difference between BAPIs and RFCs, how to find BAPIs in SAP and how to determine errors made from BAPI/RFC calls Continue Reading