Rest api to Create Reprentation in Windchill

for create it is not possible https://www.ptc.com/en/support/article/CS376728

for fetch you can use

• Use GET /Parts('{PartId}')/Representations API to get Representations
  

Hello @SS_10923513, 

It looks like you have a response on your topic. If it helped you solve your question please mark the reply as the Accepted Solution. 

Of course, if you have more to share on your issue, please let the Community know so other community members can continue to help you.

Thanks,
Community Moderation Team.