# Sandbox.WorkshopItemMetaData.ApiVersion

```csharp
int ApiVersion { get; set; }
```

The engine's [Sandbox.Engine.Protocol.Api](/api/Sandbox.Engine.Protocol/Api) when it was published - one newer than ours can't be played

Declared in [Sandbox.WorkshopItemMetaData](/api/Sandbox.WorkshopItemMetaData).
Assembly: `Sandbox.Engine`.