Making an HTTP POST request with application/x-www-form-urlencoded

Good morning Oracle community,

I have a requirement to make an API POST to Twilio which requires that the format be application/x-www-form-urlencoded.

I have all of the setup of the appropriate objects such as documents, services, and service operations, I use IBInfo.IBConnectorInfo.AddQueryStringArg to set the parameters.

I use SegmentContentType = "application/x-www-form-urlencoded;charset=UTF-8"; to set it to the appropriate content type

And then I make the call. However, I am constantly getting back a response of 400 and cannot figure out why.

Any thoughts on the matter would be very appreciated. Thank you!