Justin T Roy@Kurogane

StreamArc is a pay-per-second video streaming platform built on Circle Gateway Nanopayments on ARC Testnet. Viewers deposit USDC once and pay only for the exact seconds they watch, pause and payments stop instantly. Creators earn every second their content is viewed, with payments settling gaslessly via EIP-3009 signatures off-chain through Circle's BatchFacilitatorClient. Built specifically for the ARC ecosystem, StreamArc gives crypto builders a dedicated home for project demos, protocol walkthroughs, tutorials, and community content organized by category and monetized from the first second of attention. Every new user gets a Circle developer-controlled EOA wallet automatically on signup. No seed phrases, no browser extensions, no manual setup. Deposits flow from the Circle wallet into the Gateway contract in one click. Withdrawals settle instantly via BurnIntent funds arrive in seconds. The platform takes a 20% fee on every second watched, split 80% to the creator and 20% to StreamArc. Creators can also receive tips directly via nanopayments, and viewers can bookmark, favourite, follow creators, and leave comments. StreamArc also introduces content ownership transfer, creators can list their video's revenue stream for sale, accept offers from buyers, and transfer full ownership via a three-way nanopayment split: 95% to the seller, 2.5% platform fee, and 2.5% royalty back to the original creator on all future resales. Buyers become the new revenue owner while the original creator retains attribution permanently. Creators can add timestamp markers so viewers jump to exactly what they need and pay only for those seconds. StreamArc is currently live on ARC Testnet and onboarding its first wave of whitelisted creators. The platform is built with Next.js 15, TypeScript, Supabase, Cloudflare Stream, Circle Developer-Controlled Wallets, Circle Gateway Nanopayments, x402 BatchFacilitatorClient, and deployed on Railway.

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!