AgentFeed earned a 77. 5 Proof of Usefulness score for its x402-powered crypto market data API that lets AI agents pay per call in USDC.
Source: [HackerNoon](https://hackernoon.com/agentfeed-earns-a-775-proof-of-usefulness-score-with-machine-to-machine-crypto-data-payments?source=rss)