Please validate: SageMaker Endpoint URL Authentication/Authorization

Question

Need validation:

+ Once the SageMaker endpoint is deployed. It can be invoked with the *Sagemaker Runtime API* InvokeEndpoint *OR* it can be invoked using the endpoint URL+HTTP AZ headers (below).

+ Successful deployment also exposes a URL (on the console) that has the format:

*https://**runtime.sagemaker.us-east-1.amazonaws.com**/endpoints/ENDPOINT-NAME/invocations*

What is the purpose of this URL (shown on console)?

In my understanding this URL Cannot be invoked w/o appropriate headers as then there will be a need to have globally unique  endpoint name!!  THAT IS  to invoke this URL it needs to have the "HTTP Authorization headers"   (refer: https://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-authenticating-requests.html)

I have a customer who is concerned that anyone can invoke the URL even from the internet. Tried to do it and received the  so I know it can't be done but just want to ensure I have the right explanation. *(Test with HTTP/AZ headers pending)*

Accepted Answer

Your understanding is correct. From the docs:

Amazon SageMaker strips all POST headers except those supported by the API. Amazon SageMaker might add additional headers. You should not rely on the behavior of headers outside those enumerated in the request syntax.

Calls to InvokeEndpoint are authenticated by using AWS Signature Version 4.

Please validate: SageMaker Endpoint URL Authentication/Authorization

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