Security is critical when building with the OpenAI API — a leaked key means unlimited charges on your account.
API Key Security Rules
- Never hardcode keys in source code
- Never commit keys to git — use .gitignore for .env files
- Use environment variables in production
- Rotate keys immediately if accidentally exposed
- Set spending limits in the OpenAI dashboard
User-Facing App Security
- Always proxy API calls through your backend — never call OpenAI directly from the frontend
- Rate limit your endpoints per user
- Validate and sanitize all user inputs
- Log requests for abuse detection
Reference:
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