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Aitor
CTO & Co-Founder at Nevermined
Articles by this Author
Making x402 programmable: extending the HTTP-payments flow with Smart Accounts & Contracts
x402 is doing something very useful and at the same time simple : resurrecting HTTP 402 Payment Required as a standard way for machines to ask for payment and then retry the same HTTP request with proof of payment. The result is an internet-native payment handshake that works for APIs, AI agents, and micro-services—without accounts, API keys, or subscription checkout flows.
Standards & Interoperability
January 2, 2026