`aws s3 ls` not respecting AWS_ENDPOINT_URL

[rsyring]

Describe the bug

When using aws s3 ls with an AWS_ENDPOINT_URL environment variable, the CLI does not respect the variable.

Regression Issue

• Select this option if this issue appears to be a regression.

Expected Behavior

Based on the docs at: https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-endpoints.html

I'd expect to be able to:

AWS_ENDPOINT_URL=example.com aws cli ls s3://bucket-name

Current Behavior

An error is thrown which indicates the AWS URL is still being used:

Could not connect to the endpoint URL: "https://example.s3.ENAM.amazonaws.com/?list-type=2&prefix=&delimiter=%2F&encoding-type=url"

Reproduction Steps

$ AWS_ENDPOINT_URL=https://example.com AWS_REGION=ENAM aws s3 ls s3://leancto-dev-media

Could not connect to the endpoint URL: "https://leancto-dev-media.s3.ENAM.amazonaws.com/?list-type=2&prefix=&delimiter=%2F&encoding-type=url"

$ AWS_ENDPOINT_URL=https://example.com AWS_REGION=ENAM aws s3 ls s3://leancto-dev-media --endpoint-url $AWS_ENDPOINT_URL

An error occurred (404) when calling the ListObjectsV2 operation: Not Found

If the AWS_ENDPOINT_URL was being respected, the same error would occur for both invocations.

Possible Solution

No response

Additional Information/Context

No response

CLI version used

aws-cli/2.27.20 Python/3.13.3 Linux/6.8.0-58-generic exe/x86_64.ubuntu.24

Environment details (OS name and version, etc.)

See above

[RyanFitzSimmonsAK]

Hi @rsyring, thanks for reaching out. I was not able to reproduce this behavior. In my testing, setting the AWS_ENDPOINT_URL and making a request worked as expected.

C:\Users\rtsfitz>aws s3 ls s3://rtsfitz-test
2025-05-22 14:55:09       7081 additional.txt
2025-05-22 14:31:07       7121 model.txt
2025-05-30 13:14:54 1528801062 slightlysmallerfile.txt

C:\Users\rtsfitz>set AWS_ENDPOINT_URL=https://example.com

C:\Users\rtsfitz>aws s3 ls s3://rtsfitz-test

An error occurred (404) when calling the ListObjectsV2 operation: Not Found

$ AWS_ENDPOINT_URL=https://example.com AWS_REGION=ENAM aws s3 ls s3://leancto-dev-media

Could not connect to the endpoint URL: "https://leancto-dev-media.s3.ENAM.amazonaws.com/?list-type=2&prefix=&delimiter=%2F&encoding-type=url"

Just to confirm this isn't working for you, could you try setting the environment variables separately from the operation? Thanks!

[rsyring]

Seems like it might have been a problem with an older version of the CLI. I thought I was running the most recent but had an older bin in my path. Sorry for the noise and thanks for helping to troubleshoot.

[github-actions]

This issue is now closed. Comments on closed issues are hard for our team to see.
If you need more assistance, please open a new issue that references this one.