How I can bypass "angular-in-memory-web-api" for a specific url

You can try by removing InMemoryWebApiModule.forRoot(InMemoryDataService) from your app.module. If you have done so already, showing some code would be helpful.

Also, consider using Postman to verify your new service

you can set passThruUnknownUrl to forward to real backend for un-matching endpoints

e.g.,

InMemoryWebApiModule.forRoot(InMemoryDataService, {
  passThruUnknownUrl: true
}),