I googled and found this information that might be helpful for you:

Google Results

Hi - thank you for references. I am fairly familiar with mapping the JSON information returned with the fields in the form and manipulate them.

my questions is regarding including the query in either the URI or as header information. the JSON tool or plugin doesnt seem to have the option for the query.... the body  above is for the call to the API get/post. 

Greetings - here is an update on my testing: 

noticed that the plugin/tool has a custom json payload which is awesome! however when I entered the body below I get an X next to "method" saying "bad string". do we have some example of the format for the option?

Headers

Content-Type: application/json
Accept: application/json

Body

{
   Method: "CreateAPISession",
   Username: "janedoe",
   Password: "j@ned0e",
   APIVersion: 1,
   UseSessionCookie: false
}

Hi, you can try putting double quotes around the keys, for example "Method": "CreateAPISession"

Hi - I was able to successfully execute and save to form with payloads that are in " ". such as :

{
   "Method": "ListItems",
   "SessionToken": "janedoe",
   
   "MethodArguments": {
       ....Filters
   } 
}

However when I try to use json post payload which have a number or bolean, such 1 or false,
it doesnt work in joget json tool. it does work in Postman and other applications fine.

Is there a trick to passing those parameters? below is the error when trying to fetch a session key with such parameters:

INFO 22 Mar 2020 19:28:47 org.joget.apps.app.lib.JsonTool - POST : https://ajera.com/DV00000/AjeraAPI.ashx?ew0KalsdkjgretoisddslfkhnbljkhldfhglnvmdfnmxGVEYXRhIjogZmFsc2UNCn0%3D=
331INFO 22 Mar 2020 19:28:47 org.joget.apps.app.lib.JsonTool - Custom JSON Payload : {_ "Method": "CreateAPISession",_ "Username": "username",_ "Password": "Password",_ "APIVersion":1,_ "UseSessionCookie":false_}
332INFO 22 Mar 2020 19:28:47 org.joget.apps.app.lib.JsonTool - Adding request header Content-Type: : application/json
333INFO 22 Mar 2020 19:28:47 org.joget.apps.app.lib.JsonTool - Adding request header Accept: : application/json
334INFO 22 Mar 2020 19:28:47 org.joget.apps.app.lib.JsonTool - https://ajera.com/DV007824/AjeraAPI.ashx?ew0KICAiQ2xpZW50SUQiOiA3ODI0LA0KICAiRGF0YWJhc2VJRCI6IDEzOTc2LA0KICAiSXNTYW1wbGVEYXRhIjogZmFsc2UNCn0%3D= returned with status : 200
335INFO 22 Mar 2020 19:28:47 org.joget.apps.app.lib.JsonTool - {__ "ResponseCode": -100,__ "Message": "All requests with this API call have failed. See Errors property for details.",__ "Errors": [__ {__ "ErrorID": -150,__ "ErrorMessage": "An error has occurred.",__ "ErrorData": {},__ "ErrorObj": {}__ }__ ],__ "Content": {},__ "UsageKey": "82db2682-0f3c-4ee2-bf90-86bd3732b08b"__}


Thanks

Tony

FIXED - the issue was related to the URI ending with a "%3d". when the payload contains integers or boolean where the "" is not required the API call fails. by replacing it with the equivalent "=" sign, it works...

Tony