ELK & APIs calls

Hello,

I have a design / architecture question. In a project i wish you to implement REST APIs with custom dashboards but i want to segreagte network flows.
I would like to know if i used a distributed archietcture where kibana and logstash are two diffrent servers, the APIs call are only initiated from logtash to the destination server and not kibana.
Is there a case when APIs call are generated by kibana directly to the server without going throught logstash ?

Thank you for your help.

Kibana talks directly to Elasticsearch, it never goes through Logstash.

FB/EA can send data to ES or LS, and module dashboards to Kibana to import in ES.
LS send data to ES.
Kibana see only ES.

Thank you for your answer