There is no API support in PDM standard. In regards to the PDF question, because PDM Workgroup had automatic PDF generation, and enough people complained, they decided to include that very narrow PDM Professional ability in PDM Standard, starting with 2018. The limitations are:
- Creation of a PDF from a drawing on state change
- Saving of said PDF in the same folder location as the SOLIDWORKS drawing
- A blanket on/off setting for the vault
I'm not a PDM expert so perhaps my points are slightly off or someone could add more detail. However that's the current options as I'm aware.
I'm not aware of anyone that's actively integrated with PDM Standard except my development team at Smooth Logics. So apart from our ERP integrated solution COUNTERPART, I wouldn't expect to see/find any other PDM Standard integrations, I've only seen PDM Professional.