Sandbox and Production share one host and one schema. Your key decides which you hit.
| Property | Sandbox | Production |
|---|---|---|
| Data | Sample catalog · 10k items | Your catalogs + live index |
| Quota | 1,000 calls/day | Per plan, see Usage |
| Webhooks | Test events only | Real deliveries |
| Catalog upload | Up to 1,000 rows | Up to 2M rows per job |
Because the sandbox catalog never changes, you can write integration tests against exact item ids and attributes and they will keep passing.