Scalper bots are retail programs that race to buy limited stock the moment a sale or a product drop opens for the public.
Their angle is speed at release, grabbing units before ordinary shoppers can finish a manual checkout.
How it works
The software watches a sale, fills carts, and submits payment details as soon as the buy button is live.
People waiting in the same moment see sold out pages even though the goods were listed seconds earlier.
This is about winning the opening rush across many kinds of limited goods.
It is not the resale decision itself, not a shoe only tool, and not a last second auction tactic.
Concrete examples
- A console drop sells out in moments while carts were created faster than any queue of people could type.
- A limited toy listing disappears as repeated checkouts share the same automation rhythm.
- A general merchandise sale shows buys from accounts that never browsed, only purchased at the opening second.
Protective measures
- Add a computational check and a request cap on the drop path so speed alone cannot empty the stock.
- Favor sessions that browsed like shoppers and slow accounts that appear only at the release instant.
- Limit quantities per payment method and per delivery address during the first minutes of a scarce sale.
- Study the opening minute after each drop and block the repeatable patterns before the next release.
How CDPCaptcha helps
A proof of work challenge adds computational cost that makes high speed checkout automation less profitable on a limited drop.
CDPCaptcha is a self-hosted proof of work check in the browser, with no cookies, no tracking, and no picture puzzles.
It is made and hosted in the EU, in Germany, and the service is described at https://cdpcaptcha.com/.
Related articles
What is scalping? explains the resale practice of buying scarce goods to sell them on at a higher price.
What is a sneaker bot? explains automation aimed at footwear releases rather than general product drops.
What is a sniper bot? explains last moment bidding or buying, a timing angle unlike the opening rush.