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
The Skill Economy Built for the AI Era. AI Agent Skills as sovereign NFTs. Traded by humans and autonomous agents alike. Every Skill earns — every holder profits.
The agent-native stack decision layer for crypto builders. Composewith gives agents a source for a building stack that is current, structured, cited, and verifiable.
Rama builds Mycelium Trails — post-execution accountability infrastructure for autonomous agents. Each agent action generates a tamper-evident receipt anchored on Arbitrum. Live at argentum.rgiskard.xyz. Built for the agentic economy.
We are entering a world where artificial intelligence will touch nearly every part of life — how we work, learn, build, create, heal, and solve problems. That future is already being built. The question is who builds it, who owns it, and who benefits from it. Right now, the answers are troubling. AI development is fragmented and centralized. Access is expensive. Ownership is unclear. Trust is nearly impossible to verify. Creators struggle to protect what they build and earn from it. Businesses struggle to find reliable AI tools without assembling entire engineering teams. And communities are left consuming AI rather than owning, shaping, or benefiting from it. Joy Marketplace exists to change that. We're building the economic infrastructure for the agentic era — a decentralized Web3 marketplace where AI models, agents, datasets, workflows, tools, and digital assets can be protected, published, discovered, licensed, and monetized. A place where creators turn their intelligence into income. Where businesses find trusted AI solutions without the overhead. Where communities participate in the AI economy instead of being bypassed by it. The vision is simple, but the scale is massive. Joy Marketplace is becoming the Shopify + Hugging Face of Agentic Commerce — built not to trap creators or centralize control, but to return ownership to the people who earned it. Trust isn't a feature we bolted on. It's built into the infrastructure: blockchain-backed proof of ownership, smart contract licensing, decentralized identity, on-chain reputation, and AI-powered discovery — all running on Arbitrum with Stylus powering the contract layer. Intelligence should not be locked behind closed doors. Opportunity should not belong only to the largest corporations. The people creating the future should have a real stake in it. Welcome to Joy
Predict. Compete. Survive. A gamified prediction market where players stake ETH, predict BTC price movements, and compete in elimination rounds until one winner takes the pot.
On-chain trade credit insurance for SME. No minimum portfolio. No data exposure. Instant underwriting via FHE. Built on ReineiraOS × Fhenix × Arbitrum.
x402-compatible policy-bound payments for AI finance agents
The only defi app you need
HedgeProof Agent is an AI-powered RWA hedge quote desk that turns stock, crypto, or event-risk exposure into transparent prediction-market hedge quotes and verifiable on-chain receipts on Arbitrum.
Segregated, permissioned institutional yield vault framework.
The place where builders find their home — and coordinate it on-chain. Verify your on-chain identity, match with Hacker Houses you actually qualify for, and co-live with trustless escrow on Arbitrum.
BaseFundAI is a trust-aware, non-custodial crowdfunding protocol for real-world needs. We are solving the problem that small, urgent human needs often struggle to receive direct, transparent support. Traditional crowdfunding platforms can involve fees, custody, delays, unclear fund movement, and limited trust signals. Contributors may not know how funds move, while creators may struggle to earn confidence without heavy approval processes. BaseFundAI solves this by letting creators launch campaigns through smart contracts and letting contributors support them directly from their wallets using stable assets like USDC & USDG on supported testnets. The platform does not hold user funds. Campaign creation, contributions, campaign outcomes, creator claims, and contributor refunds are handled transparently onchain. The product also adds trust-aware campaign context, metadata-backed storytelling, campaign status, backer visibility, and live funding data so contributors can make more informed decisions.