| Header | Example/Value |
|---|---|
| Access-Control-Allow-Origin | * (or configured app URL / allowlist) |
| Access-Control-Allow-Methods | GET, POST, OPTIONS |
| Access-Control-Allow-Headers | Content-Type, Authorization, X-Api-Key, Idempotency-Key |
| Access-Control-Allow-Credentials | true |
- Preflight
OPTIONSis supported. - Prefer server‑side calls for API keys; use CORS only when necessary.
