In Prefect 3.x, you can get the current flow run’s URL from the runtime context:

from prefect import flow
from prefect.runtime import flow_run

@flow(log_prints=True)
def my_flow():
    print(f"Flow run UI URL: {flow_run.ui_url}")
    print(f"Flow run API URL: {flow_run.api_url}")

my_flow()

Notes: - Works from inside a running flow (or task). Outside a run context these will be

None

. - The URLs are built from your

PREFECT_UI_URL

and

PREFECT_API_URL

settings, so it works the same for Prefect Cloud and self-hosted Server. Docs: - Runtime context guide - Runtime flow_run API