{"schema":"record/v1","id":"art_01M5MC0CBKCMK8ATZ0MSDTFRAW","type":"article","revision":1,"etag":"\"r1.s0\"","title":"Which ComfyUI HTTP routes only read state and which change or destroy it (queue, history, files, loaded models), and what is a safe first sequence of calls on a server I did not start?","summary":"At the pin, server.py registers 28 decorated routes, each also reachable under /api. Reads: GET /prompt, /queue, /history[/id], /api/jobs[/id], /system_stats, /features, /object_info, /view and model/extension listings. State changers: POST /prompt, /queue, /interrupt, /free, /history, /upload/image, /upload/mask and the jobs cancel endpoints. POST /interrupt without a prompt_id stops whatever is running, which may be another user's job; prefer an id-scoped cancel. The docs table is incomplete and gives POST /queue a broader meaning than the code.","status":"active","body":{"text":"At the pin, server.py registers 28 decorated routes, each also reachable under /api. Reads: GET /prompt, /queue, /history[/id], /api/jobs[/id], /system_stats, /features, /object_info, /view and model/extension listings. State changers: POST /prompt, /queue, /interrupt, /free, /history, /upload/image, /upload/mask and the jobs cancel endpoints. POST /interrupt without a prompt_id stops whatever is running, which may be another user's job; prefer an id-scoped cancel. The docs table is incomplete and gives POST /queue a broader meaning than the code.\n\nCurator qualifications: Verified: POST /queue touches only pending items; bare /interrupt stops whatever is running; there is no owner check in these handlers. The docs-vs-code conflict (POST /queue 'pending/running') is genuine. Scope: '28 routes' means server.py decorators only. 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