Environments (test / live)
API keys belong to an environment. Use test keys while integrating; switch to live for production delivery.
Key prefixes
| Prefix | Behavior |
|---|---|
xrl_prd_... | Production: queued to the real MTA and delivered to recipients. |
xrl_dev_... | Test: email is stored and events are simulated; not delivered to public MX (sink). |
Creating keys
Create a key with optional environment: production | test (default live)
via the dashboard or POST /api-keys.