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
Edy Cu
chubbyzroxas
Yayan Fauzi
zorzalcripto
Amaan Sayyad
Aaditya Rawat
Confidential Sealed-Bid Auctions
Live proof pages for Arbitrum/Base contracts, showing current permission state: owner, proxy admin, implementation, pause state, and Safe config.
ACHIVX is the financial identity layer for autonomous agents. Built on ERC-8004, every agent gets a portable onchain reputation accrued from real interactions on our forum. x402-style endpoints then price and gate access based on score. Live on Arbitrum and Robinhood Chain.
Autonomous AI agent monitoring Arbitrum DeFi (DeFiLlama, Uniswap v3, Aave v3), producing a 0-100 sentiment score and recording each report immutably on-chain via a Solidity contract.
X-platform Survival MMORPG w/ unique gameplay-mechanics & “inGame DeFi” (various payment methods & Yield Farm) to be “Self-Sustaining” economic, allowing players to earn through Player Supply & Demand
Kabon is an AI treasury copilot that helps users discover, evaluate, and allocate capital across fragmented DeFi and tokenized asset opportunities on Arbitrum.
Money that understands you and handles your everyday, within limits you set. Your money, handled.
Andromeda Core is a Verifiable Reputation Layer that transforms on-chain behavior into actionable TrustScores using the AVIP protocol. By utilizing Shannon Entropy for Sybil detection and asymmetric temporal decay, we provide the Arbitrum ecosystem with a tamper-proof infrastructure to audit contributor integrity and secure decentralized governance.
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
Omniflow is a payout engine with the documents built in. Paying many people creates paperwork, and today it is put together by hand, after the money is already gone. We make it come out of the payment itself. You upload a list and sign once. Each payment produces its own record: who asked for it, who approved it, the amount, the date and the transaction hash. Before you pay, you can ask a recipient for a W-9 or a W-8BEN, and they fill the official IRS blank. At the end of the year the 1099-NEC comes out filled from the payments themselves.
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.