ULTRON.
HAND ON THE MACHINENot a search box with manners. This one runs the command, reads the file, checks the port, and tells you what came back — including when it failed.
It runs where you do. You are the operator; it is the hand.
Windows will say it does not recognise the file. That is the missing certificate, not a fault: More info → Run anyway. One 1.5 MB file, no installer wizard, no tray icon.
No account. No card. A cookie is the identity — that is the whole signup.
Dormant until asked. No screenshots, no audio, no streaming. Select a device and it wakes; leave it and it sleeps.
Commands run as you. Same permissions you have, on your machine. Read what it types before you trust it with anything expensive.
The rail is a human. There is no card processor. You send the $3 with the reference on it and a person marks it paid — so a pack can wait on somebody being awake.
One machine, one link. Install the agent on the PC you want reached. Without it there is a conversation but no hands.