x402 + smol402: Building the Decentralized AI Agent Economy on Polkadot

Sun Jan 25 2026

5.00

A piece on the long-forgotten HTTP 402 Payment Required status code, now powered by Polkadot. Built by Parity’s Head of Product Engineering Karim Jedda, smol402 eliminates centralized facilitators, RPC providers & API keys by embedding a lightweight Polkadot client https://x.com/savvyonchain/status/2013929113120133215

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Savvy λ

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X402 Smol402 Building The Decentralized Ai Agent Economy On Polkadot