
Open House 2026 is officially live - A global program for founders & builders - $800,000 in prizes - Four cities First stop: New York City 🗽 Register now openhouse.arbitrum.io/?utm_source=tw…
Arbitrum Developers
1.2K posts

@ArbitrumDevs
Technical resource hub for all @arbitrum developers. Tutorials, updates, and technical announcements.

Open House 2026 is officially live - A global program for founders & builders - $800,000 in prizes - Four cities First stop: New York City 🗽 Register now openhouse.arbitrum.io/?utm_source=tw…


Building Secure Key Management for AI Agents Last week, @VitalikButerin explained his mental model on LLM agents and why they need sandboxing, because “malicious activity can happen too quickly to be detected.” That's why I built a process-isolated KMS to manage agents' secrets locally. 00:00 The problem every agent framework still has 00:46 A local KMS Architecture breakdown 02:23 Live demo (zero-trust signing in action) 04:06 Conclusions


Registration is now open for Open House London. Open House London is a builder program + startup accelerator for founders, designed to help launch new businesses into the programmable economy on the Arbitrum Platform. All early-stage teams building AI, payments, or DeFi primitives onchain are welcome to register. Why apply? 👇🧵 openhouse.arbitrum.io/?utm_source=tw…

AI Agent Wallets Are Broken. Let's Fix That. 00:00 The actual problem 02:20 OWS Architecture 05:22 Step-by-step guide 08:18 Next Steps Every AI agent today uses a raw private key in .env, loaded in memory with full signing power, signing anything the LLM asks. That's the default. It doesn't have to be. Today on @arbitrum we visit the new Open Wallet Standard (OWS) by @moonpay

If you've ever used a Web3 wallet, you know the drill... Constant pop-ups, repeated approvals, switching back and forth just to get one thing done. Advanced Permissions change all of that. Now live on @MetaMask. 🦊 Instead of signing every transaction, Advanced Permissions allow users to grant scoped, time-bound access to a dapp or agent once. 🧵

ArbiLink is live - so is the Agentic Bounty 🧵👇🏻 We’re kicking off a new challenge for builders exploring AI x onchain: 🏆 $250 USDC for top 3 ✈️ Chance to win a funded trip to Arbitrum Open House London 🌍 Open to everyone (online) 🗓 Starts now → Ends Apr 3, 19:30 CET Join now: notion.so/arbitrumfounda…








The event to be at @EthCC is @arbitrum ArbiLink: - Meet @EdFelten from @Offchain and hear the latest on Arbitrum with an AMA - Join a panel on building the agentic rails with -- @VittoStack from @ethereumfndn -- @Swagtimus from @arbitrum -- @umeirzz from @virtuals_io -- @Med_Amine_ID from @bondoncredit - Participate in the agent bounty for a chance to win USDC cash prizes and a funded trip to the next Arbitrum Open House. Registration link in the post below. Tomorrow. Doors open at 4 pm. 📍




Deploy AI Agents with @LangChain on @arbitrum 00:00 intro 00:43 architecture 02:46 step-by-step live setup 06:12 sending txs with the agent 07:13 next steps