Does the Sandbox or HTTP JSON API service provide health endpoints?

I could only find one reference to a health endpoint in the release notes, but no documentation. Is there anything to verify those processes are still responsive? I can monitor the process itself, but it doesn’t cover the case where the process doesn’t die but is unresponsive for other reasons.

Sandbox supports the gRPC health checking protocol. You can find a bit of documentation on how to set this up at https://github.com/digital-asset/daml/blob/master/ledger/README.md#health-checks. I’m not aware of any health checks in the JSON API.

JSON API does not provide any health check endpoints.