Is Using the HTTP POST Custom API must create a HTTP Server or not

Is Using the HTTP POST Custom API must create a HTTP Server or not

Just because you repeat it twice doesn’t make it more clear.

What “HTTP POST Custom API”?
An HTTP POST is towards an HTTP server, that’s for sure.

Thank you for your help,because using the REST API not creat API Server but Using the Custom API must create an API Server or not?

Let me ask again…

no, you do not need to create an API Server to use a Rest POST within Home Assistant.