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Amazon Bedrock now supports server-side custom tools using the Responses API

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This article announces server-side custom tools support in Amazon Bedrock's Responses API using OpenAI API-compatible endpoints.

  • Bedrock now enables server-side tool use without client involvement
  • AI applications can perform real-time multi-step actions like web search and database updates
  • Supports custom Lambda functions or AWS-provided tools like notes and tasks
  • Available with OpenAI's GPT OSS 20B/120B models
  • Launched in nine AWS regions with more coming soon

This enhancement allows organizations to execute AI-driven actions securely within AWS account boundaries while maintaining governance and compliance standards.

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