The Synergist API is divided into areas. Each area is a standalone API.
e.g.
Activities API
Jobs.API
Calendar.API
When using the Synergist API you would normally be working in ONE of these areas at any one time. For instance. If you wish to create jobs you would use the jobs.json API. Within this API is everything you need to create/modify jobs. So if you wish to list clients prior to job creation you would use the jobs.json APi not the clients.json API. The jobs.json API will be passed a parameter to indicate you are interested in listing clients.
e.g.
http://<SERVER>/jsonapi/***jobs.json?***company=1&user=user&password=user&action=clients&page=1&rows=10&version=3.3