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S3-Compatible Object Storage Setup

LangWatch stores dataset records in an S3-compatible bucket. You may use AWS S3, GCP Storage with interoperability, or custom endpoints (e.g., MinIO, Cloudflare R2).

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Required Configuration

  • S3 Endpoint (e.g., https://s3.amazonaws.com or a custom endpoint)
  • Access Key ID
  • Secret Access Key
  • Bucket Name (e.g., langwatch-logs-yourcompany)
Ensure your S3 credentials have the following permissions:
  • s3:PutObject
  • s3:GetObject
  • s3:ListBucket

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🟦 Using Google Cloud Storage with S3 API (GCP Users)

If you are using Google Cloud Storage, you can enable S3-compatible access by turning on interoperability settings:
  1. Go to your project in the Google Cloud Console.
  2. Navigate to Cloud Storage > Settings > Interoperability tab.
  3. Enable Interoperability access.
  4. Create an Access Key and Secret Key.
  5. Use the following endpoint: https://storage.googleapis.com
📘 See the full guide here:
👉 GCP Interoperability Setup You can now use these credentials and endpoint just like standard S3 keys.

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🔧 Add Credentials to LangWatch

Once you have your credentials and endpoint:
  • Go to the LangWatch settings page.
  • Add them to your account at either the project level or organization level.
S3 Setup