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
Agapay (from Filipino agapay, "to walk alongside") is a non-custodial, on-chain savings and smart spending vault protocol built on Arbitrum. It lets individuals and groups lock funds into a smart contract with a beneficiary list, a due date, and optional drip-release scheduling — no bank, no counterparty, no trust required. The contract enforces the terms. A keeper triggers release; fees are transparent and configurable at deploy time. The frontend connects via RainbowKit + wagmi — users bring their own wallet.
Lock tokenized stock. Spend USDG from a cash pool. Repay, then take the stock back. If the box is tiny, use this: Spend USDG against locked stock. The shares are not sold
Effisend turns a selfie + PIN into an agent-routed venue checkout. Real Pudgy Penguins merchandise sales at Tokyo Dome City on Solana, Ethereum and BNB; Robinhood Chain is now integrated.
fheMX is a privacy layer for GMX V2 built on Fhenix CoFHE fully homomorphic encryption (FHE).
Hash Boyard turns computing power into territory. Form countries, deploy towers, and conquer an island in a browser-based strategy game designed for Robinhood Chain.
The cheapest route for a stock-token swap while New York is open, on Oku, on Uniswap, and on any router that reads the pool. Scoped to stock tokens, open hours, and retail-sized trades. The routing table below is the proof, and an empty cell means not yet.
Your agents are ready to spend. Your compliance team isn't. We close that gap AgntPymt is an enterprise payment gateway purpose-built for the autonomous AI agent economy. It acts as a financial control layer that gives AI systems a secure, governed way to execute machine-to-machine transactions without human friction. We are building this for enterprises in regulated industries (such as BFSI, fintech, and supply chain) that are adopting AI for autonomous procurement, IT management, and digital service consumption. It is for organizations that want to leverage agentic workflows but require strict compliance, predefined spending controls, built-in agent identity, and an immutable audit trail before allowing AI to transact on their behalf.
Trenchers AI is an AI-native crypto trading terminal that lets traders discover opportunities, build strategies, and deploy trading bots through chat.
Index baskets of Robinhood Stock Tokens: fully backed in an on-chain vault, minted in kind, or bought with USDG.
Institutional-grade control layer for autonomous AI agents, ERC-4337 smart accounts, delegated session keys, and centralized gas sponsorship to enforce secure, bounded, and verifiable on-chain.
Domino is an on-chain survival game on Robinhood Chain. Pick the stronger of two tokens each round and be the last player standing. Free-entry beta now; paid pools with stablecoin prizes are planned.