Rest Api Documentation

Hi i was setting up custom fields for api using this plugin i got stucked as there is not any documentation to setup fields for api examples “fields”:[{“name”:”input1″,”desc”:”User ID”,”type”:”string”},{“name”:”input2″,”desc”:”Zone”,”type”:”servervalue”}],”server”:[{“name”:”JAPAN”,”value”:”10001″},{“name”:”KOREA”,”value”:”10011″},{“name”:”ASIA”,”value”:”10021″},{“name”:”NORTH-AMERICA”,”value”:”10031″},{“name”:”EUROPE”,”value”:”10041″}]

Here input1 and input2 are text fields and server is select option the api have different products and with different fields can you provide any documentation so i can setup in api thanks .