Ravi Sir's Cards › AWS
What must a proxy Lambda return?
What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.
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What this card says
What it is
statusCode, headers, body (usually a JSON string).
Why it matters
Gateway maps that object to a real HTTP response.
How / example
Forgot to JSON.stringify body → client sees a bad payload.