★6 min read
x402: The Payment Standard Built for AI Agents
A clear explanation of x402: the HTTP payment flow built around 402 Payment Required, how Payment-Required and Payment-Signature work, and why it matters for agentic commerce.
Windrose AI is about how the agentic web actually works.
Not the demos. Not the buzzwords.
The real systems - protocols, APIs, trust layers, and the messy constraints that show up in production when software is used by agents instead of humans.
If you're building or reasoning about these systems, this is where the details matter.