@mfon910

ArcPay Commerce Suite is a production-style set of four Arc-native payment products built around Circle Gateway, x402, Nanopayments, and USDC on Arc Testnet. Instead of subscriptions, invoices, prepaid credits, ad-driven monetization, or custodial balances, each product charges exactly when value is delivered. The suite includes four live flows mapped to the hackathon tracks. AgentMeter API Engine monetizes API calls one request at a time. AgentMesh Payment Loop lets a buyer agent pay seller agents for data, scoring, and verification without batching or platform custody. Compute Drip Billing charges for compute row by row so payment tracks actual work completed. ClickCart Nano Commerce charges for previews, unlocks, creator tips, and stream ticks as individual economic events. Each site now supports a real browser-based checkout path for humans. A user opens the site, connects an injected EVM wallet, switches to Arc Testnet, deposits USDC into Circle Gateway, then clicks a priced action and completes a real x402 payment flow. For agents, every project also exposes paid endpoints that can be called programmatically with GatewayClient and a funded Arc wallet. To make the browser flow reliable, the frontend uses a same-origin Vercel proxy that forwards requests to the live Render API and mirrors the x402 payment headers. That lets the browser read and act on PAYMENT-REQUIRED and PAYMENT-RESPONSE without breaking on cross-origin restrictions. The paid routes themselves still settle against Arc Testnet using Circle’s batching model and USDC.

In this hybrid hackathon powered by Arc and Circle, developers will build the next generation of Agentic economic applications using Circle’s Nanopayments infrastructure with settlement on Arc in USDC. For the first time, high-frequency, usage-based transactions between users, APIs, and AI agents can operate without gas overhead eroding margin. Arc provides stablecoin-native settlement with predictable, dollar-denominated USDC fees and deterministic, sub-second finality — enabling real-time coordination and economically viable per-action pricing at scale. 📅 April 20 – 26, 2026 • Apr 20 – 25 (Online): Submit projects by Apr 25. • Apr 25 (On-site Build – SF, CA): Teams refine projects. • Apr 26 (On-site Demos & Awards – SF, CA): Live pitches & winners announced. Get guidance from Arc and Circle experts through on-site support. 📍 On-site Venue (April 25-26): MindsDB SF AI Collective 3154 17th St, San Francisco, California, USA 🤝 Go solo or team up, it's your flow. 🏆 Compete for a $15,000+ Prize Pool. 📍 Please note: If approved for the on-site experience, you’ll also have the opportunity to showcase your project live. Travel and accommodation will not be covered. 🧑🏻‍💻 Secure your spot now – sign up before the Kick-Off Stream!