While FileMaker’s script step Insert from URL does allow for basic communication with web services, it is, by no means, comprehensive enough to provide all the features necessary. What’s really needed is the full cURL library. This open source tool has been available for over 15 years and is baked into a ton of software packages, including FileMaker itself. However, it’s really only exposed within plug-ins such as Base Elements and the MBS plug-in.
URL https://www.filemakermagazine.com/videos/using-curl-within-filemaker-pro