Welcome to the database where you can see all previous projects from our past hackathons.
SwiftRail is a gasless USDC checkout stack for Arbitrum Sepolia. Customers sign once with USDC permit and do not pay ETH gas. A relayer sponsors gas, takes a small fee, and settles net USDC to the me
The trust layer infrastructure for AI agents onchain identity, registry, and economic primitives for the open agentic web built on Arbitrum .
ArbiLoop is an Arbitrum-native DeFi app for lending, borrowing, and loop strategies.It is non-custodial, automation-first, and focused on safer, more efficient DeFi management.
Instead of turning the blockchain into a fully opaque privacy layer (which undermines the transparency that made blockchains valuable in the first place), we built StealthPay—an opt-in privacy primitive for users who don’t want their on-chain activity easily trackable, while still preserving the public verifiability of transactions. StealthPay is built on ERC-5564 (Stealth Addresses) and ERC-6538 (Stealth Meta-Address Registry), using the stealth “announcer” flow to enable users to send and receive funds on-chain via one-time stealth addresses rather than their public wallet address. For this hackathon, we shipped an MVP focused on core stealth transfers. Post-hackathon, we plan to expand with features like P2P flows, ENS-based routing (we hit an ENS resolver issue on Arbitrum during implementation, which we also want to support as a first-class feature), a message/inbox experience, and other privacy-forward UX improvements.
Privacy DeFi powered by FHE. Swap, transfer, earn yield with fully encrypted balances. Prove compliance cross-chain without revealing amounts. Your trades are invisible, your credit travels
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Arbitrum's Fixed Income infrastructure for tradable yield tokens, powered by automated rolling vaults and risk-free lotteries.
TrainChain is a decentralized ticketing platform that transforms train travel through blockchain technology. By minting tickets as NFTs on Arbitrum, TrainChain eliminates counterfeiting, enables secur
Subscription infrastructure built on Arbitrum that enables autonomous recurring payments in USDC.
The decentralized marketplace for verifiable intelligence — where reasoning itself is the commodity
Arbitrum-native execution layer and superapp: swap (Uniswap V3), ERC-4626 vaults, strategy NFTs, DAO automation, non-custodial agents, and an optional private RPC with MEV protection. Fully permission
Privacy-Preserving Compliance Verification Engine for Institutional Real-World Assets (RWAs) on Arbitrum
