How to use HelpDesk REST API
You can review API reference on this
page.
HelpDesk REST API relies on SharePoint’s REST API, so you can use OData queries with such parameters: $select, $expand, $filter, $top and $skiptoken.
First of all you must create an API key, this can be done on Settings -> API page.
To make an API query you must include an API key in the “X-HD-ApiKey” HTTP header.
By default all entities will contain only builtin fields, but you can query additional fields which will be placed in the “CustomFields” property.
By default all queries will return the first 50 items, but you can return to a maximum of 100 items with the $top query option. Also you can page through returned items with the $skiptoken query option. Example usage (note single quotes in $skiptoken): _api/v4/tickets?$top=100&$skiptoken=’Paged=TRUE&p_ID=5’.