S3 URL Invalid When Used With iDrive E2

[tezgno]

What happened?

There appears to be a bug in the S3 URL Configuration when used with an iDrive E2 Bucket. When adding in the appropriate variables and attempting to upload a file, you receive a "Error streaming file to S3: Invalid URL" error. I believe this may be due to the iDrive Bucket URL's not using a region in the URL endpoint. For example, if you are using the US-Central-1 region within iDrive E2, your URL endpoint would be similar to bucketname.a7g8.da.idrivee2-32.com.

Version Information

LibreChat v0.8.6-rc1

Steps to Reproduce

1. Configure the variables with the appropriate information, such as:

AWS_ACCESS_KEY_ID=accesskeyhere
AWS_SECRET_ACCESS_KEY=secretkeyhere
AWS_REGION=us-central-1
AWS_BUCKET_NAME=bucketnamehere
AWS_ENDPOINT_URL=a7g8.da.idrivee2-32.com

2. Attempt to upload a file or use "Upload to Provider"

What browsers are you seeing the problem on?

Safari

Relevant log output

2026-05-26T03:19:56.441Z info: [initializeS3] S3 initialized with provided credentials.
2026-05-26T03:19:56.447Z error: [uploadFileToS3] Error streaming file to S3: Invalid URL
2026-05-26T03:19:56.448Z error: [/files] Error processing file: Invalid URL

Screenshots

No response

Code of Conduct

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[danny-avila]

Hi @tezgno, thanks for the report.

AWS_ENDPOINT_URL follows the AWS SDK convention and needs to include the scheme. Update your env var to:

AWS_ENDPOINT_URL=https://a7g8.da.idrivee2-32.com

That should resolve the "Invalid URL" error. Let me know if it doesn't.

[tezgno]

Thanks! That resolved it. May I suggest a documentation update that states that it needs to be in the AWS SDK convention. This way if someone else runs into the same issue they can easily resolve it.

[danny-avila]

Great! Yes updating docs right now