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
songsu
elpabl0.eth
contact ai
zorzalcripto
Rick
Amaan Sayyad
The BVCC Hook Analytics Dashboard — a full-stack Node.js + HTML application that scans all 4 networks (Arbitrum, BSC, Base, Ethereum) in real-time using eth_getLogs, discovers active pools
Private programmable finance for stablecoin cashflow, powering spending, credit, BNPL, and automated payments on PayFi rails.
Omniflow is an omnichain execution layer for DeFi. Today, cross-chain users must bridge assets, wait, switch networks, and manually interact with a destination protocol. Omniflow removes that friction by letting a user start from one source chain and trigger execution on a destination chain in a single flow. For the Arbitrum Open House Buildathon, Omniflow demonstrates a cross-chain liquidity launch flow powered by LayerZero V2 + compose. A user sends an OFT from a source chain, and the message triggers destination-side execution on Arbitrum, where liquidity can be created and seeded. This launchpad flow is a proof of execution, not the final product. The broader goal is to make cross-chain DeFi feel like one unified environment by turning cross-chain messages into protocol actions: liquidity launches, pool funding, vault deposits, and eventually AMM execution.
Plether Perps lets traders take simple bullish or bearish views on the direction of the U.S. dollar using USDC. The system is built around delayed execution, capped outcomes, and pooled liquidity designed to make risk easier to understand for traders and liquidity providers.
ANFT is a decentralized authorship-first digital painting marketplace where every artwork is painted within the platform and linked to the artist's Decentralized Identifier at the moment of creation where an attestation is registered on-chain, publicly and permanently recording who made the artwork, what it is, and when it was created, which placing verifiable, public authorship data on-chain so anyone can read and verify its authenticity without relying on any central authority.
CryptoMart is a Decentralized Amazon-like Platform but with crypto payments! 🚀
The on-chain admission layer for tokenized RWA collateral. Before a lending protocol accepts a tokenized stock or RWA as collateral, Collateral Passport answers one question on-chain — is this asset eligible, attested by a trusted party, fresh, and not already pledged? — and returns a deterministic Allow / Deny / ConditionalAllow. Live on Robinhood Chain testnet.
Autopay brings Stripe-level simplicity to crypto payments. Accept recurring or one-time crypto payments to gate digital products, services, memberships, or invoicing/ outbound payments. No custodial risk, No middlemen.
ClawLens is building the credit score for AI agents. Today, agents can use tools and make payments, but almost every action still requires upfront capital because there is no reliable way to assess agent risk. We solve this by creating a credit score and credit file for agents based on identity, behavior, and repayment history, helping lenders and infrastructure providers decide who to trust, how much credit to extend, and at what risk. Our first use case is enabling agents to access x402 endpoints on credit and settle later.
CardChase is a prediction market for trading card collectibles, enabling directional trading on future prices of cards & sealed product.
Denaria is a fully on-chain perpetual DEX built for the next generation of traders. Denaria delivers a mobile-first trading experience designed to make perpetual trading accessible without sacrificing self-custody or transparency. The protocol is powered by a custom dynamic virtual AMM that combines oracle-based pricing with virtual liquidity. This architecture enables leveraged trading with efficient execution and optimized slippage, while remaining fully on-chain.
ETour is tournament infrastructure on the blockchain. Developers inherit this infrastructure by implementing a simple game contract. Players connect their wallets and compete. ETH-in, ETH-out. ETour handles matchmaking, brackets, timeouts, prize distribution, and more.