tang-vu/keryx: Fork-and-run citation-toll reading agent on Arc — pays creators in USDC every time their work is cited. Autonomously buys paid sources over x402, settles weighted nanopayments to each cited creator. Reusable Arc primitives (two-toll x402, on-chain attribution registry, non-custodial spend cap) + a one-command ~90s demo.

Source-linked topic cluster with 1 signals across related articles, projects, models, papers, and source updates.