嗯目前文檔里幾乎沒有提到……

但是，An issuesis here with an offical explanation

@alexhafner Thanks for your feedback. Yes, we will improve the documentation and will include more details on the REST API. Although as you mentioned the REST API is only used by CLI but you can definitely use it with any REST client.
@jadbox You can send requests from any language that can send http requests. For instance, @alexhafnershowed how to do it from console using curl.

即文檔將會完善關于REST API的內容

嗯事實上CLI內部就是通過REST API來做的

Running a simple request

## Simple KSQL
curl -X "POST" "http://server:port/ksql";; \
     -H "Content-Type: application/json; charset=utf-8" \
     -d $'{
  "ksql": "LIST STREAMS;",
  "streamsProperties": {}
}'

or retrieving streaming data

## Stream Query
curl -X "POST" "http://server:port/query";; \
     -H "Content-Type: application/json; charset=utf-8" \
     -d $'{
  "ksql": "SELECT * FROM TEST_A;",
  "streamsProperties": {}
}'