como obtener datos de custom field

el link es este https://directorio.tuchillan.cl/item/prueba/

Try this

https://sitename.com/api/get_recent_posts/?post_type=your_post_type&custom_fields=telephone,cordenadas, lat,lng,email,website&include=title,url,custom_fields&dev=1&count=-1

dev=1 will help ya in debugging and count=-1 will show all posts. you can set it to any post limit ya want.

and how I can get a list of categories with their data and url? whether or not any post associated