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POST
Interrupt Runner

Overview

Send an interrupt signal to a ComfyUI runner to stop its current workflow execution. This is useful for cancelling long-running or stuck operations.
This sends an interrupt signal directly to the ComfyUI instance. The current workflow execution will be stopped immediately.

Path Parameters

string
required
The unique identifier (UUID) of the runner to interrupt.

Response

Returns a 200 OK status with no body on successful interrupt.

Example Response

Error Responses

error
Unauthorized - invalid or missing authentication token.
error
Not Found - runner with the specified ID does not exist or does not belong to your account.
error
Internal Server Error - unable to connect to the runner or send interrupt signal.Common causes:
  • Runner endpoint is unreachable
  • Runner is offline or not responding
  • Network connectivity issues
  • Invalid authentication headers configured for the runner

Notes

  • This endpoint makes a live request to your ComfyUI instance
  • The interrupt is sent immediately to the runner
  • Any currently executing workflow will be stopped
  • The workflow status may change to cancelled or failed depending on the execution state
  • Use this sparingly as it forcefully stops execution
  • Consider using the workflow cancel endpoint for graceful cancellation when possible
  • Response time depends on network latency to your runner