aws lambda - Is there a way to change the http status codes returned by Amazon API Gateway?

Question

For instance if I want to return a specific 400 error for invalid parameters or perhaps a 201 when the lambda function call resulted in a create.

I'd like to have different http status codes but it looks like api gateway always returns a 200 status code even if the lambda function is returning an error.

Answer 1

Update per 20-9-2016

Amazon finally made this easy using the Lambda Proxy integration. This allows your Lambda function to return proper HTTP codes and headers:

let response = {
    statusCode: '400',
    body: JSON.stringify({ error: 'you messed up!' }),
    headers: {
        'Content-Type': 'application/json',
    }
};

context.succeed(response);

Say goodbye request/response mapping in the API Gateway!

Option 2

Integrate an existing Express app with Lambda/API Gateway using aws-serverless-express.