get_author_posts return 0 posts

Hi,
I am trying to get a specific user custom posts using https://www.domain.com/api/get_author_posts?id=12345&post_type=my-custom-type" but returns 0 posts.
But if I log in and past the link onto chrome it works.
Do I have to do something before asking for the posts?

I am trying to get the custom posts outside de domain using jquery and using JSON API User Plus.

Any Ideas?