NEW FEATURE UPDATE: You can now export all your Contacts directly from the Contacts list page. Refer to this help documentation for more details

Tip: You can also export Contacts using HappyFox API, which will provide the list of all contacts, 50 at a time. Please note that you would need developer assistance or development expertise to use HappyFox API.

Here's the API documentation: https://support.happyfox.com/kb/article/1092-contacts-and-contact-groups-api-endpoints/#ListContacts