I’d like to get custom properties for all of contacts. When I used URL:
I got back values for the Hubspot build in prosperty firstname, however I couldn’t get any value for the custom property: prospectid. I know prospectid has non null value because if I use get contact by email API:
I did get prospectid value back.
How can I get custom property value for all contacts via 'Get all contacts API? Please help!