# onResourceEndpointsAllocated

- Module: [Aspire.Hosting](/reference/api/typescript/aspire.hosting.md)
- Version: `13.3.0`
- Kind: `method`
- Source: [GitHub](https://github.com/microsoft/aspire)

Subscribes to the ResourceEndpointsAllocated event

## Definition

```typescript
interface ContainerResource {
  // ... omitted for brevity
  onResourceEndpointsAllocated(callback: (arg: ResourceEndpointsAllocatedEvent) => Promise<void>): IResourceWithEndpoints
}
```

## Parameters

- `callback` (`(arg: ResourceEndpointsAllocatedEvent) => Promise<void>`)

## Returns

[IResourceWithEndpoints](/reference/api/typescript/aspire.hosting/iresourcewithendpoints.md) `builder`

## Applies to

- [ContainerResource](/reference/api/typescript/aspire.hosting/containerresource.md)
- [ExecutableResource](/reference/api/typescript/aspire.hosting/executableresource.md)
- [ProjectResource](/reference/api/typescript/aspire.hosting/projectresource.md)
- [DotnetToolResource](/reference/api/typescript/aspire.hosting/dotnettoolresource.md)
- [CSharpAppResource](/reference/api/typescript/aspire.hosting/csharpappresource.md)