Shasta has been updated. Since we wipe out the database,
You might want to re deploy the contracts.

The access for event server, full node and solidity node via https is:
Https://api.shasta.trongrid.io

GRPC access for full node is
grpc.shasta.trongrid.io:50051

GRPC access for solidity node is
grpc.shasta.trongrid.io:50052

If you want to connect, the conga file can be found at
https://github.com/tronprotocol/tron-deployment/blob/master/test_net_config.conf for full node
and
https://github.com/tronprotocol/tron-deployment/blob/master/shasta_sol.conf for solidity node

Correction：
for full node confg its https://github.com/tronprotocol/tron-deployment/blob/master/shasta.conf