The thread cone requests read the thread color tables (thread charts) that are installed on the server. Use the series ids from GetThreadConeSeries as ThreadTable in ACEParaOptimize.
The requests build on each other:
- GetThreadConeManufacturer: all thread manufacturers.
- GetThreadConeSeries: the series ids of one manufacturer.
- GetThreadConeList: weight and all colors of one series.
- GetThreadCone: one color of a series, looked up by its color number.
Note for ACE clients: The thread cone requests belong to the ZSK Web API. They use the same StitchJob endpoint and the same WebApiLicense as your ACE jobs, but you must send them without "Client": "ACE". With it, the request is handled as an ACE picture/vector job and rejected with HTTP 400.
The same description is also available in the ZSK Web API documentation: Thread cones.