# OrderRequestHeader

- [JSON representation](https://developers.google.com/assistant/transactions/reference/physical/rest/v3/OrderRequestHeader#SCHEMA_REPRESENTATION)

Common header for all order request messages.

| JSON representation ||
|---|---|
| ``` { "isInSandbox": boolean } ``` |

| Fields ||
|---|---|
| `isInSandbox` | `boolean` Required: When true, indicates that this is a sandbox order, which should not be charged and fulfilled. |