HTTP 402

Cloudflare and AWS now let website owners charge AI crawlers per request using HTTP 402, turning a dormant 1997 status code into a toll booth for machines. Cloudflare launched pay-per-crawl in July 20…

A developer designed a system using HTTP 402 Payment Required to let AI agents pay for API calls per use. The approach involves a gateway proxy that verifies budget-capped tokens, checks spending limi…

A solo developer built AOTrust, a service that cryptographically notarizes AI agent outputs for $0.01 per proof on Base L2. It issues a 239-byte Provenance Data Record (PDR) using the HTTP 402 payment…