The Internet Had a "Payment Required" Button for 29 Years. Cloudflare Just Turned It On.

HTTP status code 402 has existed since 1997. The original HTTP/1.1 specification reserved it "for future use." For nearly three decades, no one found a use for it. Last week, Cloudflare and Stack Overflow changed that. The system is called pay-per-crawl. When an AI crawler requests a page from a participating website, the server responds with HTTP 402 — Payment Required — along with a price header. The crawler either pays or leaves. No negotiation. No "we'll give you exposure." Cash or nothing. Cloudflare handles roughly one in five websites on the internet. That's not a niche experiment. That's infrastructure-level monetization of AI training data, deployed at the same scale the crawlers themselves operate at. How the Tollbooth Works The technical implementation is straightforward. Publishers set a flat per-request price for their domain. Cloudflare's Web Application Firewall identifies AI crawlers, categorizes them, and serves the 402 response instead of the content. Crawlers authent