The documentation page of the REST API is available on your ProgressionEXPRESS server at the URL /c2000rest.
ie.: http://test.courrierpro.ca/c2000rest/
You will then be directed at the documentation page /c2000rest/doc/index.html
The page contains the explanation for each operation as well as the parameters and the returning values.
To authenticate requests, an API key must be provided to your clients. This is made through the Internet users maintenance of ProgressionEXPRESS:
NOTE: If you alter the list of client accounts associated to the user, a new API key must be generated for the user to have access to the client through the API.