Can i use _vti_bin/ListData.svc service to write data to a sharepoint site

I’m able to read in list data using _vti_bin/ListData.svc but not sure if I can write data using the same service. I’ve tried _api/web and _vti_bin/Client.svc but keep getting an error back, either a 404 or a 500.

I assume that the sharepoint site I’m trying to access doesn’t support _api/web or client.svc?

Thanks