OpenAI API from Next.js Route Handlers: Keys, Streaming, and Safety

This post was created with AI assistance and reviewed for accuracy before publishing.

The OpenAI API powers many coding assistants and apps. OpenAI Platform docs document authentication, models, and APIs such as Chat Completions and the newer Responses-style APIs depending on your integration.

Why Route Handlers

Never expose secret keys in the browser. Call OpenAI from Next.js Route Handlers, Server Actions, or your backend so keys live in environment variables on the server.

Streaming

For chat UIs, stream tokens to the client over SSE or chunked responses. The SDK examples show how to forward streams safely.

Safety and policy

Apply OpenAI’s usage policies and your own content rules. Log errors without logging user secrets. Rate-limit per user to control cost.

Practical takeaway

Pin SDK versions. Re-read release notes when OpenAI deprecates models or changes API shapes.