Usually the CATALOG is used the one inside the /integration_tests/configured_catalog where you don’t need to specify the json_schema, only the other values.
See example:
{ "streams": [{ "stream": { "name": "agents", "json_schema": {}, "supported_sync_modes": ["full_refresh"] }, "sync_mode": "full_refresh", "destination_sync_mode": "append" }, { "stream": { "name": "business_hours", "json_schema": {}, "supported_sync_modes": ["full_refresh"] }, "sync_mode": "full_refresh", "destination_sync_mode": "append" },