Adds a new filter, returns the ID upon success. Note that in the conditions JSON object only one first-level condition group is supported, and it must be glued with ‘AND’, and only two second level condition groups are supported of which one must be glued with ‘AND’ and the second with ‘OR’. Other combinations do not work (yet) but the syntax supports introducing them in future. For more information, see the tutorial for <a href="https://pipedrive.readme.io/docs/adding-a-filter" target="_blank" rel="noopener noreferrer">adding a filter.
Returns all supported filter helpers. It helps to know what conditions and helpers are available when you want to <a href="/docs/api/v1/Filters#addFilter">add or <a href="/docs/api/v1/Filters#updateFilter">update filters. For more information, see the tutorial for <a href="https://pipedrive.readme.io/docs/adding-a-filter" target="_blank" rel="noopener noreferrer">adding a filter.