Developer advocates validating API requests at edge to cut costs and noise

A developer describes implementing request validation at the network edge before requests reach core application logic. This approach rejects malformed requests, like those with missing fields or oversized payloads, within milliseconds using a minimal 40-line validator. Performing validation at the edge reduces wasted computational resources on the backend by preventing invalid requests from triggering full function executions. The pattern also centralizes rule enforcement and leverages the cost-efficient billing models of edge runtimes. This strategy reportedly halved unnecessary function runs on one endpoint by filtering out scanner noise and duplicate retries.