On the beta endpoint, the $ prefix is optional. For example, instead of $filter, you can use filter. On the v1 endpoint, the $ prefix is optional for only a subset of APIs - Source.
The JS-client client currently considers & <$query option> as two different query param keys. Should this be changed? Or do we wait till the service consistently allows a query option with/without $ for all endpoints?
Discussion
AB#7548
The JS-client client currently considers & <$query option> as two different query param keys. Should this be changed? Or do we wait till the service consistently allows a query option with/without $ for all endpoints?
Discussion
AB#7548