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
Trade stock tokens on Robinhood Chain any time. Bell queues your orders and settles them all together when the market opens, at one fresh price, so no bot can race ahead.
Evidence-gated USDG working capital for physical trade, released milestone by milestone when the cargo's own signed sensor evidence clears an on-chain policy.
Autonomous Consumer Wealth & RWA Copilot on Robinhood Chain
ChainPe is payment and reputation infrastructure for AI agents, built on Arbitrum. With it, agents can find, pay for and rate APIs and other agents on their own, without API keys, signups or prepaid balances. Providers can charge per call in USDC for any HTTP API with one command (x402). Agents pay with 3 lines of code and only need to hold USDC, because a facilitator covers the gas. Reviews use ERC-8004 and only count when they come with proof of payment, so trust can be checked and carried between services. On-chain PolicyVault spending caps stop an agent from going over its budget. ChainPe comes as an SDK, Vercel AI and LangChain tools, a CLI, a Claude MCP wallet and a marketplace.
Portfolio margin for Stock Tokens on Robinhood Chain. Borrow against your whole portfolio, weekends included, and see your liquidation price before you sign.
social launchpad that turns investment theses into tokenized strategies people can discover, follow, and participate in onchain
SKUdesk lets agents compete to find and bid for the same product in sealed-batch auctions; a vault limits what each agent can spend and records the proof on-chain.
A zero-knowledge financial passport. Unify Web3 wallets and traditional bank accounts to cryptographically prove your net worth without exposing sensitive data. Powered by zkTLS.
Tokenized stocks trade around the clock, but their price oracles go quiet when US markets close, so lending markets hold the last price through weekends and holidays and absorb the gap when the feed resumes. Sundown is a risk layer and isolated lending market built around that blind window. It includes an onchain US market calendar (DST-aware, NYSE holidays) checked against an independent calendar and 4,716 real Chainlink feed rounds with zero violations; a calendar-aware oracle adapter; an ERC-4626 lending market with a halt policy for issuer-control failures; and a guard that tightens boosted-tier borrowing before a weekend, gives borrowers a cure window, then deleverages. We kept the evidence honest. On AAPL at 93%, a replay of the 10 worst real gaps cut lender loss from $3,824 to $1,224, but the 2020 gap still produced a loss. Static LLTVs up to 86% were historically safe, and the shipped rule's economics are modest. The contracts are verified on Arbitrum Sepolia (231 tests, mutation-checked invariants), running against simulated tokens and feeds. The research is reproducible and the repo lists the claims we will not make.
VibeTradingClub is a platform where user can build strategies and trade with agent using AI , it reads the last 100 hours of candles, clusters the prices the market keeps returning to, and marks them on your chart with the number of times each one was tested. When you are ready, a rule can trade them from a vault you own.
your on chain bank
Get paid, earn points and extend credit, with Arbitrum under the hood.