In a recurring job, we are using incremental endpoint under help_center group to download the help articles updated after certain time. Since, for first run of job, we need to download all the articles available, we are using 0 as start_time. But, this is not returning all the articles as we only get 1300 articles even after going through all the pages until next_page is null.
Endpoint used - /api/v2/help_center/incremental/articles.json?start_time=0
We know that there are around 4400 articles as we get all of them when we download them one by one for all locales using /api/v2/help_center/{locale}/articles.json?page[size]=100
Could you please explain how incremental endpoint works and what can we do if we want to download all the articles data.