This integration is built as a SolidWorks AddIn for SolidWorks 2014 and 2015.
Using both SolidWorks and PTC Mathcad Prime's API, this AddIn lets users quickly drive PTC Mathcad Prime input variables from SolidWorks' CAD model parameters. Users can also map PTC Mathcad Prime output results back to the SolidWorks CAD model. This creates describes the bi-directional nature of the integration.
This free download is PTC's Lite version of the integration. The full version is available, including source code, as part of the PTC Mathcad Prime 3.1 SDK.
Note: PTC Mathcad/SolidWorks Integration is not officially supported by PTC.