GET Attachment API syntax

I'm trying to retrieve attachments from ServiceDesk ( using Rest API. There is no syntax given for this in the API documentation :-(

Can some one from SolarWinds tech team post the answer please?

I have the authentication working, I can get data from incidents and I'm trying to get the attachments that are connected to the incident.

Error executing REST request: Invalid uri ' Invalid queryHTTPStatus = 0

Thank you