An open-source, web-native payment protocol enabling autonomous AI agents to transact over HTTP.
x402
An open-source, web-native payment protocol enabling autonomous AI agents to transact over HTTP.
2025founded
Activestatus
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x402 is an open, neutral standard for internet-native payments that makes payments possible between clients and servers. It enables agentic payments at scale by integrating directly into existing HTTP requests, responding with HTTP 402 if payment is not received. This standard aims to create win-win economies and a more free and fair internet for both humans and AI agents.
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