We are using the relative URLs for development purposes. In a typical JSON API, we’d have an ID field and an integer for a value. Then, the client would form a URL based on that ID.

You can check that file with: less clients.csv You should see a perfectly-formatted CSV file, ready to be uploaded (Figure A). Figure A Our CSV file, exported from xlsx, using in2csv.

JSON was accepted as a standard by the International Organization for Standardization as ISO/IEC 21778:2017 with the goal of defining the syntax of valid JSON texts. JSON is used in JavaScript on the ...