NiFi InvokeHTTP POST request authenticate via api key and send json input in request body

Welcome to the community @madhs. @stevenmatison is this something you can provide clarity on?

Use an UpdateAttribute processor to add attributes with your header values. i.e. Content-Type with value of application/json and in the InvokeHTTP you'll notice there's a field called Attributes to Send (or something like this... They will be the headers) and list those Accept|Authorize|Any other (it's regular expression so you might have to escape some characters). FlowFile content should be sent as the body. 

@madhs @joseomjr A great example of the configuration is above.

Here is a full flow definition file/example showing how to get values from JSON and prepare ahead of an InvokeHTTP processor:

Flow Def File:

https://raw.githubusercontent.com/cldr-steven-matison/NiFi-Templates/main/InvokeHttp_Demo_2.json

@madhs  Have you resolved your issue. If so, please mark the appropriate reply as the solution, as it will make it easier for others to find the answer in the future. 

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