What’s Happening
The JSON format of filters returned by the Lists API will begin to look different. When creating or updating lists, you can still send filters as they are currently documented and we’ll translate them to the new format for you. When filters need to look different, the filters field will not be in the response and the information you need will be a new field called ilsFilters
Why is this happening?
HubSpot is upgrading the filtering capabilities of our Lists tool to better support some features we have planned for the future. This required filters to be formatted a little differently. We added the ability for these to be backwards compatible after listening to you about how the API is currently used.
You can see a full list of the new filter formats on the List Overview documentation.
This change will take place on July 26th
If you have any questions, please join the conversation in the community.