None of these applications are provided or supported by M-Files, and are used at your own risk.
Postman is a standalone application for building, testing and diagnosing API requests for REST-like web services. Postman can be used to manually build HTTP web requests (including HTTP headers and body content), to execute the requests, and to analyse the response.
Additionally, a Postman collection is included within our GitHub repository. This collection can be used to interact with the M-Files Web Service more easily.
Telerik Fiddler is a web debugging proxy. Fiddler can be used to monitor HTTP/HTTPS traffic to investigate the requests and responses.