I want to use sink route scripts to handle http requests but I can't

Question on messaging by Mr A, on 29/12/20: Hi I want to use sink route scripts to handle http requests but I can’t. I generated signature for the URL. What is the complete URL path? for example: http://my_server/system/sink/my_url?_sign==SIGNATURE or sth else?

My browser show:
Application (/system/sink/my_url) not found. Can anyone provide a complete onRequest example?

Thanks in advance.

how about if yo prefix your request with /api
so: /api/system/sink....