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feat(bedrock): add support for AWS_BEARER_TOKEN_BEDROCK #1147

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feat(bedrock): add support for AWS_BEARER_TOKEN_BEDROCK #1147

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@Ashutosh0x Ashutosh0x commented Jan 22, 2026 •
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Fixes #1079.

This PR adds support for Bearer Token authentication in the AnthropicBedrock client.

Changes

  • Added aws_bearer_token parameter to AnthropicBedrock and AsyncAnthropicBedrock.
  • Automatically checks for the AWS_BEARER_TOKEN_BEDROCK environment variable.
  • Uses Authorization: Bearer header if a bearer token is provided, skipping SigV4 authentication.

Verification

  • Verified with verify_bedrock_auth.py by checking request preparation and environment variable handling.

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AnthropicBedrock: AWS_BEARER_TOKEN_BEDROCK env var not supported

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