# IResource.subscribeHttpsEndpointsUpdate

- Module: [Aspire.Hosting](/reference/api/typescript/aspire.hosting.md)
- Defined on: [IResource](/reference/api/typescript/aspire.hosting/iresource.md)
- Version: `13.5.3`
- Kind: `method`

Subscribes to the `BeforeStartEvent` and invokes the specified callback when an HTTPS certificate is determined to be available for the resource. This is used to conditionally update endpoint URI schemes or perform other HTTPS-related configuration at startup.

## Definition

```typescript
interface IResource {
  // ... omitted for brevity
  subscribeHttpsEndpointsUpdate(callback: (obj: HttpsEndpointUpdateCallbackContext) => Promise<void>): IResource;
}
```

## Signature

```typescript
subscribeHttpsEndpointsUpdate(callback: (obj: HttpsEndpointUpdateCallbackContext) => Promise<void>): IResource
```

## Parameters

- `callback` (`(obj: HttpsEndpointUpdateCallbackContext) => Promise<void>`)

## Returns

[IResource](/reference/api/typescript/aspire.hosting/iresource.md) `builder`

## Defined on

- [IResource](/reference/api/typescript/aspire.hosting/iresource.md) -- `interface`