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
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
Piron brings real-world fixed income to Arbitrum through Term Deals, Flexible Yield and Fixed Yield: three clear ways to put stablecoins to work.
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
Navigate DeFi investments through FHE-encrypted AI agents tracking on/off-chain intel!
Galena aims to be THE marketplace for algorithmic investment strategies. In an industry where the legit strategy sellers are masked by a plethora of affiliate marketing scammers, we seek to provide a payment model that incentivises and attracts legitimate profitable quant traders to a central platform. On the customer side, clients get access to verified profitable strategies in a manner that allows them to entirely avoid capital gains tax as well (not legal advice).
Xeno is the neobank for merchants - operate local, do business global.
Autonomous. Secure. Focused. Infrastructure for financial agents that never sleep and never get distracted.
StableGuard is autonomous cross-chain stablecoin depeg protection. When UST/Terra collapsed, $40B disappeared with no automated warning system — protocols kept accepting bad collateral because nothing was watching fast enough. StableGuard cross-checks two independent data sources before acting — a Chainlink price oracle and on-chain DEX data — avoiding the false alarms that plague single-feed monitoring bots. When confident a depeg is real, it automatically fires a Chainlink CCIP alert that can broadcast to multiple destination chains at once, triggering protective action before a human even notices. It doesn't stop a stablecoin from collapsing if it's genuinely dying — nothing can — but it stops the collateral damage from spreading to protocols and positions that had nothing to do with the original coin.
RWA infrastructure protocol building and operating energy storage systems, generating real revenue