How to modify the number of returned items in Queries made with the API

Issue

The headless API only returns a maximum of 500 items per query, even when a higher page size is defined.
How to define de page size per instance.

It is possible to configure the number of queries to return using the pagesize parameter. To use the maximum allowed page size for that instance, you can set the parameter to 0 or a negative number. For example:
- pagesize = -1
It is also possible to define the maximum number of allowed items for each instance. This can be configured from the Control Panel > Instance Settings > Web API > Headless API > Page Size Limit.