Monitor competitor marketplace prices
The poster uses Grok Bot to check competitor listings and product prices over time, though CAPTCHAs block it on some sites.
Done withGrok Bot
- What they did
- The poster says they use Grok Bot to periodically check product prices and competitor listings on a few online marketplaces. The bot browses those sites on its own, but some marketplaces interrupt it with CAPTCHAs; the poster says they currently have to use an API to solve them, and commenters suggested lower request rates, logged-in sessions, or routing the bot’s traffic through the user’s own device.
- How it went
- It works for ongoing marketplace price checks, but reliability breaks on sites that throw CAPTCHAs, including a mouse-movement puzzle. No performance numbers or savings are given.
- Worth knowing
- The main catch is that CAPTCHA handling was not solved natively in the thread; the poster says they are using an API for it.
Try it yourself with Grok Bot
Every [day or week], check these competitor listings on [marketplace names]: [links or search terms]. Record the price, stock status, and any changes in a spreadsheet, and flag anything that dropped more than [percent]. If a site blocks you with a CAPTCHA, skip it, list it as blocked, and send me the summary when done.
Want help getting this working? Join the Vibe Coding Academy ↗ Run by Alex Finn, who also runs this site.
Source: Reddit · Sep 25, 2026
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