Thanks @abcoathup! And where can I find the kovan/rinkeby/mainnet url for the relayer?
You can view the relayers for a particular network with the following URL and your injected web3 (e.g. MetaMask) set to the appropriate network:
Thanks @abcoathup! That helps. Do you know if there is any documentation about the API endpoints that are supported by the relayer URLs?
Try the following documentation: