x402
Open payment protocol enabling agents and apps to pay for APIs over HTTP using stablecoins.
Last release Apr 13, 2026 · Last commit Jun 5, 2026 · ★ 88
Overview
x402, introduced by Coinbase, revives the HTTP 402 'Payment Required' status code as an open protocol for machine-native payments. It lets AI agents pay per-request for APIs and services using stablecoins like USDC, a key building block for agents that autonomously buy the resources they need.
Details
- Chains
- Base, Ethereum, Multichain
- Open source
- Yes
- Pricing
- Free / open protocol
- Last checked
- 2026-06-10
Marketplace Signals
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Verification status reflects evidence reviewed by Sato Hub. Self-reported claims are never presented as verified.
Recent Activity
All news →Releases and posts from x402, pulled from its GitHub and X.
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