TL;DR: HTTP 402 âPayment Requiredâ has been reserved since 1997 but never used â because humans canât approve per-page charges fast enough. AI agents can. The x402 protocol (Coinbase, 2025) revives 40âŚ
CloudFront
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2026
HTTP 402: The 30-Year Placeholder That AI Agents Finally Activated
Making My Website AI-Agent Friendly â Here's What Changed
The Test That Failed Last weekend, I pointed an AI agent at my own blog and asked it a simple question about an article Iâd just published, my hands-on experiment with self-reflection on Amazon BedrocâŚ