Short answer: no. In Prefect 3.x there isn’t a way to remotely “attach” to a worker’s stdout/stderr stream. What you can do instead: - See flow/task output: these are captured as Prefect logs. Use:

prefect flow-run logs <FLOW_RUN_ID>
  prefect task-run logs <TASK_RUN_ID>

Or view them in the UI on the flow/task run page. - See worker diagnostics (Cloud): worker logs (polling, heartbeats, etc.) are visible in the Cloud UI under Work Pools → your worker. There’s no CLI for worker logs. - Local debugging (Process worker):

stream_output

streams a flow’s subprocess stdout/stderr to the worker’s local terminal (default True), but it’s not forwarded remotely. - Infra logs: if your worker runs under Docker/Kubernetes/systemd, use those tools to view the worker process’s stdout (e.g.,

docker logs

,

kubectl logs

,

journalctl

). If you can share where your worker runs (local, Docker, K8s, VM) and what you’re trying to observe (flow prints vs. worker health), I can suggest the most direct setup.