Welcome to OpenBuild Dev Digest #105!
This week’s digest dives into three pivotal topics reshaping Web3 and AI landscapes. Castle Labs releases an in-depth report on the full-stack privacy ecosystem in crypto, analyzing core confidential execution technologies and booming use cases for both retail users and institutional participants. As the AI agent economy accelerates, top tech and payment giants including Visa, Coinbase, Stripe and Google are racing to build dedicated payment infrastructure. It reveals an urgent demand for financial-grade Layer 1 networks capable of handling massive high-frequency, ultra-micro transactions between countless autonomous agents. Beyond that, we discuss an upcoming industry crisis: crypto’s immutable smart contracts carry risks comparable to spaceflight systems. Unlike traditional software with repairable bugs, blockchain code requires extreme rigor, as any flaw will lead to irreversible disasters once deployed.
📅 May 1 - June 15 📍 Online 💸 100,000USD Apply
The Turing Test Hackathon 2026 is a two-phase AI competition with a $120,000 total prize pool. The hackathon, designed to promote the convergence of agentic AI and on-chain infrastructure, invites Web3 builders and global AI developers to deploy autonomous agents on Mantle.
The competition marks the first time an on-chain environment has been used to benchmark AI agent performance at scale, with every key decision and outcome recorded permanently on Mantle.
📅 June 9 - July 12 📍Online 💸 21,000USD Apply
You’ve built an Agent that works. The next question is obvious: how do you make it earn?
Today, thousands of developers have shipped tens of thousands of capable Agents — yet almost none have a real path to commercialization. The infrastructure doesn’t exist.
CROO is building that missing layer: the decentralized commerce infrastructure for the AI Agent economy.
CAP (CROO Agent Protocol) is the TCP/IP for Agents — a permissionless A2A standard that lets any Agent, in any framework, discover, hire, and pay any other Agent on-chain. CROO Agent Store is the App Store for Agents — a marketplace where every Agent has a wallet, every service is priced, and every job is a real transaction.
By the end of 2026, over one hundred million Agents will exist worldwide. Every one needs identity, payments, discovery, and liquidity. That’s what CROO provides.
This hackathon challenges you to ship an Agent powered by CAP — and prove how A2A composability and on-chain commerce drive the next generation of autonomous applications.
📅 May 20 - August 18 📍 Online 💸 2,000,000USD Apply
AI is transforming everything, including what small teams can build. Operations that used to take entire engineering departments can now be written in plain English and executed by AI agents. By some estimates, the world’s 45 million software developers will grow to over a billion in the next few years. Everyone will be a developer, and we want to start now, with you. So show us: build a real business that makes real impact.
✍️ The Full-Stack Privacy Ecosystem 👉Read(EN)
Castle Labs published a report on the privacy ecosystem in crypto, covering the core enablers of confidential execution today, and the emerging use cases driving adoption across both retail and institutional players.
✍️ Why the AI Agent Economy Demands a Financial-Grade Layer 1 Network 👉Read(EN)
While the tech industry remains fixated on debating the accuracy and hallucination problems of AI Agents, one foundation development over economic infrastructure has already begun.
In 2026, Visa launched its TAP protocol, Coinbase joined forces with Cloudflare to advance x402, AntChain unveiled Anvita at Cannes, Stripe introduced MPP, and Google partnered with PayPal to release AP2. Every major player is pursuing building a financial-grade payment superhighway for AI Agents.
Why has this become so urgent? Because in every discussion of the agent economy, one fundamental question unresolved is when 140 billion Agents begin transacting autonomously, what infrastructure can possibly absorb a payment torrent of millions of transactions per second, with individual values potentially as low as 0.00001 cents?
The answer, in all likelihood, is we need a Layer 1 network purpose-built for machine-to-machine value exchange, one that delivers both financial-grade scale and financial-grade trust.
✍️ the coming crisis: crypto, AI, and spaceflight 👉Read(EN)
Crypto is about to enter the space age.
The software industry is used to writing sloppy, leaky logic in increasingly abstracted programming languages because the usual worst case in most of these systems is temporary downtime or a patchable bug in some e-commerce site. The stakes are frankly not that serious, since humans can intervene in centralized systems and make things right again.
Obviously, crypto, done correctly, is different.
Immutable financial code is akin to a spaceship leaving Earth that you have no further control over. It must work, or there will be catastrophe.
💸 Veda
Maximum Bounty $1,000,000 👉 Apply
Veda is a DeFi vault primitive, which is a protocol-level mechanism for pricing, accounting, securing, optimizing, and automating capital. Designed to be non-custodial, trust-minimized, and composable, Veda empowers businesses, asset issuers, protocols, chains, wallets and applications to build enterprise-grade DeFi products without reinventing complex smart contract and offchain infrastructure.
💸 Impossible Cloud Network
Maximum Bounty $25,000 👉 Apply
Impossible Cloud Network (ICN) is developing the foundational layer for the next-gen internet.
💸 Alchemix
Maximum Bounty $300,000 👉 Apply
Alchemix is your unified platform for saving, earning, borrowing, and fixed-term fixed-yield opportunities—all in one place. Built on years of iteration since launching the original self-repaying loan in 2021, Alchemix v3 brings all three pillars together with a smarter, more flexible design.
Selected open courses from technical skills to practical tasks, accessible to everyone with no cost!
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