Power Platform Community Forum Thread Details

Hi community,

We're trying to programmatically cancel running Power Automate flows from an external system (Python backend) using just:

runId
flowId
environmentId

This includes flows triggered by SharePoint (like “When an item is created/modified”), not just manually triggered ones.

What we’ve tried

Using the public REST API:

POST https://api.flow.microsoft.com/providers/Microsoft.ProcessSimple/environments/{envId}/flows/{flowId}/triggers/manual/histories/{runId}/cancel?api-version=2016-11-01

But it fails with:

"No HTTP resource was found that matches the request URI..."

What we understand this only works for flows with manual triggers (e.g., “When an HTTP request is received”). However...The “Cancel Flow Run” action available in the Power Automate Management Connector (inside Power Automate flows) does cancel SharePoint-triggered flows — using the same identifiers (runId, flowId, envId). This confirms the functionality does exist internally.

What we want

We're looking for a way to cancel any running flow — regardless of its trigger — using a public REST API, and without needing premium features like Dataverse or solution-aware flows.

Questions:

Is there a documented REST API or supported method to cancel non-manual flows (e.g., SharePoint-triggered) from outside Power Automate using runId, flowId, and environmentId?
If not currently possible — is this feature on the roadmap?
Is the “Cancel Flow Run” logic in the Management connector backed by an internal API that might eventually be made public?
Any workaround that works without Dataverse or premium licensing?

Thanks in advance — any clarity or official response would be greatly appreciated!

— Bharadwaj Jannu

Categories:

Using flows

I'm not sure this is the workaround you are looking for, but one possibility would be to create a Power App front end to invoke a manual flow. Pass the three parameters from the Power App to the Flow and then use the management action to Cancel the Flow run. That should work and would be Standard licensing. But it doesn't tie in to Python as you suggested.

I don't have any internal knowledge to answer your other questions.

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Paul Papanek Stork, MVP
Blog: https://www.dontpapanic.com/blog