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How to Build a Secure Node.js AI API Gateway With Rate Limiting

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A new tutorial guides developers through building a lightweight Node.js AI API gateway that validates incoming JSON requests, assigns unique request IDs, and enforces per-client rate limits. The gateway acts as a secure intermediary, forwarding approved requests to a separate model service without exposing upstream provider credentials to browser-side code. It accepts POST requests to a single endpoint, rejecting oversized payloads and enforcing a defined message structure of up to 20 messages with restricted roles and character limits. The project requires Node.js 18 or later and relies solely on built-in runtime modules, with no model-provider SDK needed. The tutorial is designed as a focused reference implementation and does not prescribe a complete production architecture or specific AI vendor.

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How to Build a Secure Node.js AI API Gateway With Rate Limiting · ShortSingh