PayStream Voice AI Agent for USDC Payments on Arc

PayStream is a voice‑activated AI agent that turns natural language into safe, programmable USDC payment agreements on Arc testnet. Users speak a request (“pay Alice $10 weekly”), and the agent handles the full lifecycle: speech‑to‑text, intent parsing, agreement preparation, on‑chain escrow, oracle approval, and execution. The frontend runs on Next.js, backed by serverless API routes on Vercel. Agreements are formed as EIP‑712 payloads and authorized by the agent, then settled through a Solidity conditional‑escrow contract that holds USDC until predefined conditions are met. Oracles provide signature‑based policy checks (limits, recipients, timing), ensuring payouts follow guardrails. Optional WalletConnect lets users review or co‑sign from their own wallet, while Circle Developer Sandbox can be used for compliant wallet flows. The result is a transparent, auditable, and trust‑minimized payment experience that feels conversational yet executes with on‑chain guarantees. PayStream is ideal for recurring payouts, creator subscriptions, service retainers, and automated reimbursements—unlocking hands‑free payment operations for teams, apps, and agents.