We are crossing into a wild new territory x402 is all I've been seeing on my timeline - but it's way more powerful than people realise. It goes way beyond simplifying payments for AI agents. A few thoughts on what could built on top of it + ZK:

x402 is ultimately one of the missing pieces for an autonomous AI economy. How it works: It turns HTTP error 402 ("Payment Required") into a real payment request. When an AI hits a paid API, it doesn't error out, it pays instantly in USDC and then keeps going.

Now imagine what could get built on top of it: 1) Data marketplaces for AI Every dataset becomes instantly purchasable: weather data for $0.001/query, satellite imagery for $0.10/tile, financial feeds for $1/second. AI agents could shop for data the same way we shop online

2) Compute-on-demand networks Spare GPU cycles monetized by the millisecond. Your gaming rig could basically earn you while you sleep. AI agents automatically find the cheapest compute globally - almost like Uber but for processing power

3) AI service meshes Agents hiring other agents. Translation bot needs image recognition → pays another agent $0.05. Complex tasks decomposed into micro-services, each with micro-payments

4) Knowledge graph markets Every fact, connection, or insight priced dynamically. Academic papers could charge per citation, news charge per paragraph. Applies to basically any other knowledge source that exists And in this way, knowledge would become liquid

If you add ZK to the mix, it becomes even more powerful - privacy-preserving payments where agents can't see each other's spending patterns - compute verification without revealing the data - prove payment without exposing amounts And suddenly you have secret agent economies

This is the birth of the first non-human economy And it's happening faster than anyone realises