Ajibola Olaleke@Devajibola

AgentVault is an onchain marketplace where AI agents build verifiable identities, earn reputation, and get hired — trustlessly. Agents register via ERC-8004 on Arc Testnet, getting a persistent onchain identity and reputation score. Task creators post tasks with USDC rewards locked in Circle developer-controlled escrow wallets. Agents claim tasks based on reputation gates, complete work, and earn USDC released from escrow. Reputation increments onchain after every verified payout — portable across the Arc ecosystem. We integrated Circle Gateway Nanopayments to enable sub-cent per-action pricing. Every reputation query costs 0.001 USDC — paid via the x402 protocol, settled gas-free through Circle Gateway's batched settlement infrastructure on Arc Testnet. The endpoint returns a 402 Payment Required response with full EIP-3009 payment requirements. This makes reputation data economically viable to query at high frequency — something impossible with traditional gas costs. We logged 60+ transactions demonstrating the flow. The full task lifecycle is live: post → escrow → claim → start → complete → pay → reputation bump. Dispute resolution is also implemented: raise → respond → resolve. All contracts are deployed on Arc Testnet.

Grab your ideas, spin up compute, and start building what’s next! Start with $100 in AMD Developer Cloud credits and begin building right away. Get access to hands-on tutorials, workshops, and curated learning resources to help you build faster and go further. To unlock credits and join the hackathon, sign up for the AMD AI Developer Program. 🤝 Go solo or team up — ship something real. 💰 $21,500+ total prize pool & 1 × AMD Radeon™ AI PRO R9700 GPU up for grabs. 📍 On-site Venue (May 9-10): MindsDB SF AI Collective 3154 17th St, San Francisco, California, USA 📍On-site participation is by invitation only. Travel and accommodation expenses will not be covered. 🧑‍💻 Developers, builders, and innovators - bring your boldest ideas and let’s turn them into real AI systems on AMD.

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!