New to json

Hello,

I’m completly new to this stuff..can You please help me out of this,

how can i call category posts. refer http://pay4mb.com/sample4/api/get_category_posts/

{“status”:”error”,”error”:”Include ‘id’ or ‘slug’ var in your request.”}

Just wanted to know how this works.

https://ww.wp.xz.cn/plugins/json-api-user/