Clojurians Log v2

aws-api's interactions with aws are based on data descriptions of their apis: (https://github.com/aws/aws-sdk-js/tree/master/apis)

AWS does not make any promises about those descriptions aligning with specs that other vendors use to make s3-compatible services, so neither can we.

Actually, looking at the error you posted above, "no known endpoint", that comes from aws-api even before trying to send a request out.

OK, so the answer to your original question is that no, aws api does not promise to work with endpoints outside of aws. Please feel free to submit an issue https://github.com/cognitect-labs/aws-api/issues and we can continue the convo there.

When supplying a valid :region I manged to connect to a NetApp StorageGRID S3 endpoint.

(def s3 (aws/client {:api                  :s3
                     :region               "us-west-1"
                     :endpoint-override    {:protocol :https
                                            :hostname "<http://s3.example.com|s3.example.com>"}
                     :credentials-provider (credentials/basic-credentials-provider
                                             {:access-key-id     ACCESS_KEY
                                              :secret-access-key SECRET_KEY})}))
(aws/invoke s3 {:op :ListBuckets})

withou :region the aws/client runs for a while an than failes with an error:

Execution error (ExceptionInfo) at cognitect.aws.region$chain_region_provider$reify__13062/fetch (region.clj:37).
No region found by any region provider.

with :region "foo" the error is a little misleading:

Execution error (ExceptionInfo) at cognitect.aws.client.api/client (api.clj:94).
No known endpoint. 

… but with :region "eu-central-1" the client is created and (aws/invoke s3 {:op :ListBuckets}) successfully delivers the expected results

Did you have a region configured in your environment? https://github.com/cognitect-labs/aws-api#region-lookup https://docs.aws.amazon.com/sdk-for-java/v1/developer-guide/java-dg-region-selection.html