uArc Automation Layer

uArc: The AI & x402 Automation Layer for Arc ​uArc is a natural language DeFi automation platform and x402-native agent infrastructure built on Arc L1. It allows humans to manage DeFi via plain English and enables external AI agents to access execution infrastructure programmatically via the x402 API—paying per use in USDC without frontends, API keys, or subscriptions. ​The Problem & Solution ​DeFi automation currently suffers from high "configuration fatigue"—users must manually map contract addresses and parameters. For AI agents, the hurdle is worse: there is no standard, pay-per-use interface for on-chain tasks. Furthermore, micro-fees (like $0.002) are mathematically impossible on most chains due to gas overhead. ​uArc solves this by: ​Natural Language Parsing: AI interprets "Buy $200 ETH if it hits $2000" and constructs the on-chain automation struct. ​x402 Infrastructure: External agents use HTTP 402 (Payment Required) headers to pay for infrastructure on-demand using Circle Nanopayments. ​Arc-Native Economics: Every execution is profitable because Arc’s gas is USDC-denominated and sub-cent. ​How It Works ​Human Flow: User types a sentence \rightarrow AI parses intent, fetches live data (Curve, Aave) \rightarrow User signs once \rightarrow Automation is live. ​Agent Flow: External agent hits uArc API \rightarrow Attaches USDC Nanopayment signature \rightarrow uArc registers and executes the task autonomously. ​Key Technical Pillars: ​Vault Contract: Non-custodial storage where funds are only moved based on pre-approved rules. ​Modular Registries: Plug-and-play contracts for conditions (Price, Time, Balance) and actions (Swap, Lend, Transfer). ​Atomic Settlement: Fee transfers are bundled with execution; the agent only gets paid if the trade succeeds.