As others have pointed out West Wind Client Tools has support for making the HTTP as well as support for helping you deseraize the JSON data returned (or any that you may have to send). While there are other tools for doing HTTP calls with VFP, wwHttp has a bunch of additional features to facilitate sending and receiving data, plus tools to actually do something with the data that comes back - like deserializing and serializing JSON in the case of a typical REST service.

DO wwHttp
DO wwJsonSerializer

loSer = CREATEOBJECT("wwJsonSerializer")
lcJsonIn = loSer.Serialize(loPostObject)    && Some object or value to serialize

loHttp = CREATEOBJECT("wwHttp")
loHttp.cContentType = "application/json"
* loHttp.cHTTPVerb = "POST"  && not required for GET/POST but use for  PUT/DELETE/HEAD/OPTIONS etc,
loHttp.AddPostKey(lcJsonIn)  && raw post data

lcJsonResult = loHttp.HttpGet(lcUrl)

loResultObject = loSer.DeserializeJson(lcJsonResult)

*** Do something with the result object
? loResultObject.status
? loResultObject.Data.SummaryValue

More info:

* Access HTTP content from the Web
* wwJsonSerializer Class


+++ Rick ---

>Do you know if it is possible to call Web API RESTful (built on .NET) service from VFP 9 app? I am talking about passing a couple of values from VFP 9 app to the Web API?
>
>TIA