...
Check the API Key expiration date when you encounter a 401 error. Renew the API key to resolve the error encountered.
Basic Authentication Support for Proxy
...
Adding Basic Authentication support to the outbound flow when connecting to a backend service through the API proxy is important to enhance the security and flexibility of outbound connection in the SnapLogic APIM solution. This authentication is executed on the JCC level, and the other policies applied are executed after the execution of Basic Authentication.
...