Release / 23 Dec 2025 / with 2025.12.20251219001245

Open source MCP servers for AWS 2025.12.20251223100855

Authenticate AWS API MCP sessions with OAuth.

Before you upgrade to 2025.12.20251223100855

1 to fix

Create custom working directories before starting the server; it now creates only its default working directory.

Action requiredManage AWS resources through validated AWS CLI commands.Affects: Users configuring a custom AWS API server working directory.

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awslabs/mcp/releases/tag/2025.12.20251223100855

What changed in 2025.12.20251223100855

The AWS API server adds OAuth support and stops creating custom working directories; HealthOmics can search ad hoc S3 buckets.

Available in the awslabs MCP server packages at this release. Use an MCP-compatible client and the relevant server's runtime, credentials, and service permissions.

Fixed and improved

Search additional ad hoc S3 buckets for workflow data.

ImprovedGenerate, run, debug, and optimize life-science workflows in AWS HealthOmics.

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awslabs/mcp/releases/tag/2025.12.20251219001245

Download and start DynamoDB Local for model validation with the corrected Java startup handling.

Now worksDesign DynamoDB data models and analyze source MySQL schemas.

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awslabs/mcp/releases/tag/2025.12.20251219001245

Retrieve table schemas through the RDS Data API without the reported SQL syntax error.

Now worksQuery PostgreSQL databases through the RDS Data API.

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awslabs/mcp/releases/tag/2025.12.20251219001245

Use OAuth authentication with the AWS API server.

ImprovedManage AWS resources through validated AWS CLI commands.

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awslabs/mcp/releases/tag/2025.12.20251223100855

Seeded by @iluxav with Codex, from the release's public sources. Each change links to its evidence.