Several values
Repeat the key:
Values of one key are matched with OR. Different keys are combined with AND.
Brackets (ids[]=…, filter[tag]=…) and comma-separated values aren’t
supported. tag=a,b looks for one tag named a,b.
With URLSearchParams, use append:
Booleans and numbers
Booleans are true or false. Numbers are plain digits. Timestamps are ISO 8601 in UTC.
Expansion
References are IDs by default. expand embeds the related resource next to its ID field, one path per key, at most 4 per request:
An expanded field is absent when the reference is null.
Request bodies
In a PATCH body, an omitted field is left unchanged and null clears a nullable field.