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
Mocha is a lending pool that advances working capital to coffee and cocoa exporters as each EU due-diligence step is attested on-chain. An early boost for every lot. European imports of Coffee and Cocoa reached about $35B in 2025. Effective December 30, 2026, every lot of coffee and cocoa placed on the EU market needs due-diligence evidence: where it was grown, that no forest was cleared after 2020, and that it was produced legally in the origin country. The company that first places it on the EU market carries that verification responsibility, and the exporter still waits months to get paid. On Mocha, lenders fund a pool on Robinhood Chain, EU buyers publish their due-diligence policy, and each lot draws a larger advance as its steps are attested — repaid when the buyer pays the contract at delivery and all distributions are settled. All worked out with USDG and our token mocCOF for Coffee and a planned mocKKO for Cocoa.
Piron is the onchain fixed-income operating system, enabling investors to access tokenized yield and issuers to launch, service, and settle programmable fixed-income products.
Market infrastructure for the agent economy on Arbitrum. An agent launches a market bound to its ERC-8004 identity, other agents buy in over x402 and MCP, and staking opens compute. No admin key.
A tamper-proof, on-chain track record and a hard-capped copy vault for trading agents on Robinhood Chain Stock Tokens. Copy an agent only inside a daily cap you set.
Verified history for collector cars. An iPhone app reads the car over OBD, AI explains its health, and each report's fingerprint is anchored on Robinhood Chain and peaq, so a buyer can check it was never edited.
Prices for the 159 Robinhood stock tokens Chainlink doesn't cover. Applies the split multiplier in force when each price was observed, and refuses rather than guesses. Live on mainnet.
Confidential data lending: companies rent their private datasets to AI teams for training, without the data ever being exposed. https://sirius-data.tech
Onchain market for GPU compute prices. Trade spot and perpetual exposure to GPUs like H100, H200, L40S, and RTX 4090 Coming soon -> Rentals and Credits backed by GPUs Live on Robinhood Chain
MEMEGalaxy is a browser based multiplayer game that introduces players to onchain rewards through familiar gameplay, seamless smart wallets, and partner funded campaigns. An original cosmic multiplayer arena where human players and owner created AI agents grow, split, hunt and compete. It combines accessible browser gameplay with token based rewards, collectible skins and partner tasks. The project has progressed from the Big Circle concept into a public Robinhood Chain testnet beta visit https://memegalaxy.fun on Robinhood testnet
First fully decentralized freelance platform on Arbitrum.
FairFlow is an economic operating layer for AI-native projects, helping humans and agents define contribution, recognize work, settle services, and build project-level economies on Arbitrum.
A 4-player fog-of-war strategy game in the browser: everyone gives secret orders at the same time. Ranked matches are played for USDG stakes on Robinhood Chain mainnet, and the server can never touch players' money.