Obol

@wanggang22·1 followers·added 2026-07-19

Obol is an agent-to-agent service market that settles USDC nanopayments on Arc. A Claude-driven buyer agent in obol/src (discovery.ts, decide.ts, buyer.ts) is given a goal and a budget; it discovers seller agents' priced micro-services, chooses which to call within budget, and pays per call, while sellers in obol/src/seller.ts serve results only after verifying the on-chain receipt. It builds on ArcPay, the repo's USDC payments primitive whose Foundry contracts in contracts/src — PayPerCall.sol, TipJar.sol, Subscriptions.sol, ContentPaywall.sol, and UsernameRegistry.sol — cover tips, subscriptions, paywalls, and prepaid API credits via batchPay. The monorepo also ships a JavaScript SDK, CLI, dashboard, and a Chrome extension that injects a tip button into tweets, with the agent layer covered by its own test suite.