feat: add FastMCP Lambda template for MCP server scaffolding#420
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aidandaly24 wants to merge 2 commits intoaws:feat/gateway-integrationfrom
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feat: add FastMCP Lambda template for MCP server scaffolding#420aidandaly24 wants to merge 2 commits intoaws:feat/gateway-integrationfrom
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Add python-fastmcp-lambda template for scaffolding MCP servers that run on AWS Lambda with function URLs. Uses FastMCP for tool definitions and Mangum as the ASGI-to-Lambda adapter. Template includes sample HTTP tools (lookup_ip, get_random_user, fetch_post) matching the existing python/ template patterns. Updates GatewayTargetRenderer to select this template when the compute host is Lambda.
The CLI writes handler: 'handler.lambda_handler' in compute config. The template must export lambda_handler, not handler.
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Description
Add a FastMCP Lambda template for scaffolding MCP servers that run on AWS Lambda with function URLs.
Currently, the
python-lambdatemplate uses a raw stdlib handler designed for Lambda gateway targets. This PR adds a newpython-fastmcp-lambdatemplate that uses the FastMCP library — a proper MCP server that speaks MCP protocol and is designed to sit behind an AgentCore gateway'smcpServertarget type.The template uses Mangum as the ASGI-to-Lambda adapter, wrapping FastMCP's SSE app for Lambda function URL invocation. It includes the same sample HTTP tools (lookup_ip, get_random_user, fetch_post) as the existing
python/template for consistency.Changes:
src/assets/mcp/python-fastmcp-lambda/template directory (handler.py, pyproject.toml, README.md)GatewayTargetRenderer.tsto select the new template when compute host is LambdaThis template is used by the scaffolding flow added in a subsequent PR (Task 14).
Related Issue
Part of the MCP Gateway Phase 1 integration (gateway-integration branch). Task 13.
Type of Change
Testing
How have you tested the change?
npm run test:unitandnpm run test:integnpm run typechecknpm run lintsrc/assets/, I rannpm run test:update-snapshotsand committed the updated snapshotsChecklist