You can query rpc nodes with https://www.steemfiles.com/cgi-bin/getsteemnodes.cgi
It gives url and what witness is responsible for it as well as how well it is operating.
You can query rpc nodes with https://www.steemfiles.com/cgi-bin/getsteemnodes.cgi
It gives url and what witness is responsible for it as well as how well it is operating.