AI agents running from datacenter servers often receive 403 errors or anti-bot challenges when collecting data from protected websites.
No, Residential IPs and anti-detect browsers help, but nothing makes you “unblockable.”
Sites check a lot more than your IP and browser. They also look at how fast you’re moving, how you click and scroll, how many requests you send, CAPTCHAs, and account history. Big players like Cloudflare and DataDome look at all of it together. So you’re fixing maybe 2 things out of 6 and the rest can still catch you.
And it’s an arms race. What works today probably gets flagged next month.
It’s also pricey, since residential proxies usually charge by the GB, and you can get in legal trouble if you’re breaking a site’s terms.
Honestly the better move is to use the official API if there is one, buy the data, or just scrape slow. Or use something like Firecrawl or ScraperAPI and let them deal with the blocking.
Stealth tools improve your odds. They’re not an invisibility cloak.