Welcome to the database where you can see all previous projects from our past hackathons.
Decentralized, parametric coverage for DeFi Protocols
Every day, people are made promises. Your order will arrive. This draw is fair. Your prize will be paid. Today, all of them run on one thing: "trust me." Keptra replaces "trust me" with proof. A global trust infrastructure on Arbitrum One, with Chainlink bringing the real world on-chain — deliveries, draws, payouts — so anyone can verify them, and nobody needs a wallet to benefit. Two products live today: Verified Delivery and Giveaways & Event Center. Card payments next. Then the Keptra Token.
What if public money could only move with public agreement? DemocraFund is a fully working, deployed system for transparent public tendering. It puts the whole lifecycle of a public project on the blockchain: the bids, the votes, the award, and every payment. Money only leaves the system in stages, and only when the right people cryptographically sign that the work is actually done. Not the committee alone, not the builder alone, not even the administrator alone. Everyone can see every decision the moment it happens, and nobody can move a token without the system's approval. It runs today on Arbitrum Sepolia, piloted with Humewood Golf Club, with 151 automated tests behind it. The result is simple to state: the oversight is no longer a report written after the money moved. It is the machine that moves the money, and it only accepts the public's agreement as the key.
The competitive market for verified query plans.
Execution oracle for AI agents: "is it safe to send NOW?" 12 networks measured every 2 s against independent RPC nodes, signed answers, on-chain registry on Arbitrum, pay-per-call in USDC via x402 on Arbitrum One. ETHGlobal + Casper finalist.
Hood Relief is a community relief pool. Someone in trouble a medical bill, a stolen wallet, a lost job, a house fire files a case describing what happened and what they need. The case opens for a five-day community vote. One wallet, one vote. If it clears quorum, funds are released from the shared pool and the payout is written to a public ledger with its transaction hash. No single case can request more than a set percentage of the pool balance. There is a second path that skips all of that: a direct campaign, where the creator names their own payout address and supporters send money straight to it. Hood Relief never holds that money and never releases it. The payout address locks the moment the first donation confirms, so nobody can build an audience on one address and swap in another. The project's home chain is Robinhood Chain, an Arbitrum Orbit L2. Donations are also accepted and verified on Arbitrum One, Ethereum, Base, Optimism, Polygon, BNB Chain, Avalanche, Solana and Bitcoin every transfer is proven server-side against the chain before it counts toward the pool. Members without a wallet sign in with email or Google and get an embedded wallet, because the people this is for are usually not the people who already own a hardware wallet. It is live at hoodrelief.com.
Local-first wallet-security prototype with a working Arbitrum Sepolia policy-commitment demo. Controlled browser tests allow matching requests and block approval, recipient and policy mismatches.
x402-powered AI market intelligence for humans and autonomous agents.
Decentralized AI verification subnet where miners compete to produce reliable machine intelligence and validators independently evaluate correctness, robustness, calibration, and latency to determine
On-chain sponsored banners that reward viewers in WETH for verified visibility.
Gloam is the privacy layer for Robinhood Chain. Shield a balance, then hold, pay, and send tokenized assets without exposing your size or holdings. Settlement stays verifiable to anyone who needs it.
AgentGuard VerifyPay is a policy-controlled escrow layer for autonomous AI agents on Arbitrum. It lets a Buyer Agent hire a Seller Agent within explicit budget, asset, risk, and expiry rules. Quotes that violate policy are BLOCKED, invalid results are FROZEN, and payment is released only after independent verification with publicly verifiable evidence.
