API Gateway

Common Errors

Works in Lambda, but not in API Gateway

Testing in API Gateway:

Status: 502

Response Body:

"message": "Internal server error"


Lambda execution failed with status 200 due to customer function error: RequestId: 80572150-944e-40e5-b782-aca7f713289f Process exited before completing request. Lambda request id: 80572150-944e-40e5-b782-aca7f713289f


Check your lambda function is either:

  • Make sure you define your handler function async ; or

  • Use the callback argument in your handler

For example:

export async function webhook(event, context) {
return {
statusCode: 200,


export function webhook(event, context, callback) {
callback(null, { statusCode: 200 });