API Wallet Agent - USDC Micropayments on Arc
API Wallet Agent is a trust-minimized payment layer for AI agents and web services that need to pay other APIs, data sources, or compute providers in real time. Instead of monthly subscriptions and static API keys, it enables per-request micropayments using USDC on Arc. Providers publish x402-style pricing metadata (e.g., cost per image or per query), and the consumer sends a natural-language task like “Generate 3 images under $0.05.” The backend uses Gemini function-calling to parse intent, select the best provider/tier, calculate total cost, enforce budgets, and trigger an onchain USDC payment. Each payment produces a verifiable receipt (tx hash + invoiceId), then the provider API executes the request. This demonstrates machine-to-machine commerce with transparent, auditable payments.
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