Add Pay-Per-Call to Any API Without Stripe

HTTP 200: success. HTTP 404: not found. HTTP 402: payment required. Reserved since HTTP was invented. Unused for 30 years. Agents just turned it on. x402 is the protocol. Your agent requests a resource. Gets a 402 back. Pays in USDC automatically. Retries. Gets the data. No accounts. No API keys. No subscriptions. Payment happens inside the HTTP request. Coinbase built it. Cloudflare co-governs it. 22 organizations already in: AWS, Stripe, Visa, Mastercard, Microsoft, Google, Shopify. 119 million transactions on Base. 35 million on Solana. $600 million annualized. Zero protocol fees. One line of middleware. That's the entire integration. The API key is dead. It just doesn't know it yet. Link in bio.