We let an agent cull our own codes overnight. Here's its first shift.

Most coupon sites run automation that only ever adds. A scraper wakes up, finds more strings that look like promo codes, and dumps them onto a page. The list grows, the dead codes pile up underneath the live ones, and nobody is paid to take anything down. A vault that only grows is a vault that rots.

So we built the opposite. It's called the night watch, and its entire job is to subtract.

What it does

Once a night, while the crew is asleep, the watch wakes up and looks for the brands nobody has checked in a while — the stalest corners of the vault, where codes are most likely to have quietly died. It takes the two that have gone longest without a look, and it re-verifies their codes with the exact same engine the crew uses by day: fresh web evidence, no shortcuts. Then it updates the record and mails a one-line report to the captain before he's awake.

Its first real shift

The stalest brand on file was Nuts.com. The watch pulled its codes, checked each one against current evidence, and came back with a verdict: every one of them dead. Six codes, six retirements, none surviving. Start to finish, seventeen seconds. The morning report read exactly one line — the brand, and the tally of what it had buried.

That is not a glamorous headline. "Agent finds nothing worth keeping" will never trend. But it is the honest one, and it is the whole point.

The part that matters: it can't lie for us

Here is the design decision we care about most. The night watch can't invent a working code. Nothing about running unattended, in the dark, with no human watching, lets it put a green badge on a code without real evidence. On a code's public page, green takes a checkout: either a person carrying the code through the store's real cart, or our bot putting it in a real cart and reading whether the store accepts it. Those two are always labeled differently, so a machine proof never passes as a human one. The robot is allowed to be the janitor. It is never allowed to be the salesman.

That's deliberate. The failure mode of an unwatched agent is that it starts telling you what you want to hear. That the codes are good, the deals are live, everything works. We built ours so the only way it can say "working" is if the store's own checkout said it first. If it gets something wrong in either direction, the next receipt overrides it. A crew member's checkout counts the same as the bot's, and the newest one stands.

It also knows when to stand down

The watch respects a kill switch — one setting turns it off entirely, no code change required. It only touches a couple of brands a night, so it never goes on a rampage through the whole vault. And it works the stale edges, not the settled ones: it picks the brands nobody has looked at in the longest time.

This is what we mean when we say Clipper is built to be honest even about itself. The flashy version of an AI coupon tool is one that finds you endless codes. Ours spent its first night quietly proving six of them were worthless and telling you so. We'll take that trade every time.

Updated September 2026: when this was written, the watch only weighed web evidence and could only retire codes. It now also tests codes at the live checkout on stores where our bot can read one, so it can prove a code as well as bury it. We rewrote the parts above that said otherwise, rather than leave a description that stopped being true.

Every code shows when it was last checked — by a person or by the watch. Browse the vault, graveyard included, at clipper.deals/codes. ✂