Open House Archive
Welcome to the Open House Archive - your central repository for accessing all previous Open House buildathons and projects.
Welcome to the Open House Archive - your central repository for accessing all previous Open House buildathons and projects.
Most Hackathon Won
Most Project Built
Manobendra Mandal
Vivek Sahu
simp1e
Aaditya Rawat
Skia Variants
Akan
ByHuman is building a writing receipt protocol for the AI era. As AI-generated text floods the internet, readers, platforms, publishers, and online communities are losing reliable trust signals for authorship. Existing tools mostly analyze the final text and make probabilistic guesses. ByHuman solves this from the other side: we capture composition evidence at the point of writing, including what was typed, pasted, edited, and preserved, then generate a signed writing receipt. Receipt hashes are anchored on Arbitrum, while the original text stays off-chain, creating a public, tamper-evident verification layer for online writing.
AfreeKart is a programmable escrow infrastructure project for commerce, using smart contracts to enforce safer buyer-seller transactions and reduce trust friction in online trade.
Your AI portfolio manager for DeFi
Lucilla is the only mobile platform with an AI agent that drops multinational, stablecoin-funded rewards across thousands of locations in seconds. Users walk into those zones and claim cash directly to their wallets. Lucilla strength isn't just an ad network it's a social rewards platform. Users earn stablecoins from brands, then stake that cash against friends in step matches: daily walking competitions where the winner takes the pot.
Tokenized Equity Corporate Action Automation Engine for Robinhood Chain / Arbitrum
The project combines digital art, blockchain artist identity, and automation to provide a simple experience for collectors and creators alike.
Bonded x402: liquidity behind mission-critical outcomes.
The Programmable Treasury OS for the Onchain Economy Turn your DAO or onchain business treasury into a policy-driven system. Define rules once. Let agents propose. Multisig executes. Audit forever.
AI-powered perpetual trading with a Stylus WASM order book, multi-agent safety committee, and cross-chain settlement between Arbitrum Sepolia and Robinhood Chain.
Skepsis is a continuous-outcome prediction market. Instead of yes/no, you price the range a number lands in. Binary markets price direction and pay nothing when the number lands off-strike; Skepsis prices magnitude, so the payoff scales with how close you are. It runs on Arbitrum Sepolia, resolves on Chainlink, and is curated. LMSR over a bucket tree prices every range on one continuous curve (range, time, and 1-of-N options markets). One ERC-4626 vault seeds every market, so a market is tradable the moment it's created, and recycles capital on resolution. LPs earn fees across all markets. Unified liquidity: one curve with shared depth, not fragmented per-threshold binary books. Solvency is guaranteed on every trade: LMSR keeps pool balance ≥ max payout, and the alpha parameter bounds worst-case LP loss. Alpha decay tunes spreads over a market's life to blunt manipulation and converge to efficient pricing. (confirm direction vs. the deployed contract) Traders express a precise view (CPI in 2.8–3.2%, not CPI > 3%); treasuries and LSTs hedge precise exposures without basis risk; parametric insurance becomes possible.
We are three horsemen to build a Traceable Agriculture Supply Through Real World Asset Tokenization.
The DEX that pays you back when it hurts. Self-sustaining Impermanent Loss Shield. Provide liquidity and get compensated for price divergence. Automatically.