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.

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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.

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JSON API does not provide any health check endpoints.