I give Postman a try with a POST on https://api.ps3838.com/ in order to login.
ps3838 is a RESTful service belonging to Pinnacle and is documented here https://github.com/pinnacleapi/pinnacleapi-documentation.
The login works fine (Status 200 ok), the problem is the result follows html format instead of JSON.
result being :
Anyone having an idea or already had this difficulty?