OpenAPI/Swagger spec for API

[gdsfgsdfgsdf]

Trying to search on forum and in the internet - I can't find any API description that could be used to generating api client.
Searching on public zabbix repos with ui code and documentation give me a reason to believe that it can be generated like documentation because there already exists all what should be used to make OpenAPI spec.
So I suggest to make it and deliver via doc site as part of API reference

[gdsfgsdfgsdf]

Or may be OpenRPC spec https://open-rpc.org/