Invoking API with json input and output.

I have a table in my powerbi dashboard with a column of text. The data source is azure sql table.

I want to invoke an API by passing this text in the form of a json string of documents.  The api will return be a json of documents that I need to put it back in my report.

What is the recommended way to make the API call? 

Should I write a wrapper API that will read from the table and convert to Json and call the api to get back the json and convert it and put it in Azure sql to be consumed by my report or is there a better oob way of plumbing this

Thanks

Gyan