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.
Greek is a complete tokenized Options system that allows anyone to create options and markets around any tokenized asset in a capital efficient manner.
The simplest way to access stocks with fewer bureaucratic barriers and a more tax-efficient path to global investing.
Tiktok for onchain gaming, Powered by AI
AlphaGrid is a decentralized prop trading protocol where autonomous AI financial agents compete for capital under transparent onchain risk rules, while trading tokenized stocks on Robinhood Chain.
Confidential Alpha Network for On-Chain Finance
A composable DEX with HFT-grade liquidity for RWA.
Oracle-based DEX where professional market makers quote tokenized stocks and blue-chip assets with CeFi-tight spreads.
Hero Mandate is proof of action for AI trading agents, built on Robinhood Chain. Robinhood put agentic trading in millions of hands; Hero Mandate proves an agent stayed within the authority it was given, without revealing the strategy. You delegate under an encrypted mandate, budget, allowed tokens, limits and expiry, and every trade becomes a tamper-evident receipt on Robinhood Chain; a breach is provable while the mandate stays sealed. Our headline innovation is the Chain of Mandate: authority delegates downward to sub-agents, each sub-mandate provably narrower than its parent, checked on encrypted values. Provable delegation, zero disclosure. It's the same primitive as Hero's robotics engine, one system, two surfaces. Hero mandate techstack: Smart contract (the core) - Rust, compiled to WASM, on Arbitrum Stylus (stylus-sdk, alloy-primitives) - Deployed with cargo-stylus - Live on Robinhood Chain testnet (chain 46630) - Tested with cargo test + Stylus TestVM Chains - Robinhood Chain testnet (Arbitrum Orbit stack) Payments / settlement rail - @arbitrum/mpp (Machine Payments Protocol) - emits the payment credential - Uniswap Permit2 (permitWitnessTransferFrom) - token settlement - ERC-20: hUSD demo stablecoin on Robinhood Frontend (the site) - Next.js 15 (App Router, static export output: export), React 19 - TypeScript, Tailwind CSS 4 - ethers v6 - Hosted on Netlify
PAYKX is building an independent execution assurance layer for programmable and agentic payments. Before an AI agent, wallet, or payment platform commits funds, we provide independent verification to determine whether a payment should execute.
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.
DiversiFi Guardian is a values-driven savings guardian with an autonomous intelligence layer that allocates your savings across global and regional stablecoins, RWAs, and yield — verifiable on-chain. Saving is universal, and so is the risk to it: inflation erodes purchasing power everywhere, gold has outperformed every "stable" currency, and political risk exists in every jurisdiction. The app shows you your own money's depreciation (never prescriptive), you pick a values philosophy that shapes every allocation, and an autonomous AI agent executes within your permission bounds — with every decision recorded on the Arbitrum RecommendationLedger and every reasoning step anchored immutably to 0G Storage. Not "trust our AI" — you can check every transaction. Built solo on Arbitrum One mainnet, with real GMX yield deposits validated and the ledger deployed across five chains. No token, no points theater.
Financial markets for collectibles, starting with prediction markets for TCG asset prices
Most Hackathon Won
Most Project Built
Manobendra Mandal
Vivek Sahu
simp1e
Akan
Skia Variants
Hafiidh Luqmanul Hakim