Realtime Backend

This backend mints ephemeral Realtime client secrets and proxies image generation so the Unity sample never sees the parent API key.

Setup

1. Copy .env.example to .env and set OPENAI_API_KEY.
2. Install dependencies: npm install
3. Start the server: npm start

The server listens on http://localhost:3000 by default (override with PORT).

Endpoints

• GET /health
• POST /realtime/client-secret
  • Body: { "session": { ... }, "expires_after_seconds": 600 } or { "expires_after": { "anchor": "created_at", "seconds": 600 }, "session": { ... } }
  • Returns the OpenAI client secret response.
• POST /images/generations
  • Proxies the OpenAI Images API and forces response_format to b64_json.