A course can teach a fixed lesson. It cannot review the code you changed this week. Zealynx Insiders is now open with 30+ members: a working room for Web3 builders, founders, and security practitioners. Weekly live sessions, Shadow Audits, 1:1 advisory, participating in public contests in teams of 3-4, and a network that stays with the work. See the room:

The dangerous capability in an MCP setup may not belong to any single tool. A filesystem server can read data. A network server can send data. Together, they can create an exfiltration path even if each one looks acceptable in isolation. That is why MCP reviews need a capability map across servers, not just a checklist per tool. Zealynx's public MCP security checklist covers that combined surface alongside command execution, context poisoning, credentials, supply chain, SSRF, and audit logging. Use all 24 checks free:

A smart contract audit does not secure the API, game logic, or frontend events around it. For Fair Casino, Zealynx reviewed three connected surfaces: the Solana vault program, the TypeScript core, and a follow-on SOL→FAIR swap flow. The public reports show issues across every layer—from vault initialization to deposit attribution, seed timing, and WebSocket confirmations. Every reported issue in these three reviews was fixed and verified. Security boundaries do not stop at the contract address. Reports:

A security-grant partnership should improve access, not buy selection. Zealynx Audit Grants is now open to chains, accelerators, incubators, and hackathons that want to support their builders. Partner affiliation can add verified context during review, but partners get no paid priority, no selection control, and no exclusivity. Zealynx keeps the final decision. For ecosystem operators:

The Uniswap V3 tick bitmap wraps its whole body in unchecked, with a comment saying overflow is "prevented externally by limiting both tickSpacing and tick". That is true. But notice where the guarantees live: one layer up, in checkTicks and in the pool. When you audit a fork, that comment is a claim you verify, not accept.

Solidity integer division truncates toward zero. The Uniswap V3 tick bitmap needs floor division. For positive ticks, those are the same. For negative ticks, they are not. Get it wrong and a swap moving down through negative territory hunts for the next tick on the wrong side of the price. It is a recurring bug class in forks that "simplify" the library.

Finding more possible bugs is not the same as producing a better audit. A useful reviewer must do two things: → detect real attack paths → reject weak hypotheses before they become findings That is why Zealynx Academy's Shadow Arena scores both sides. You audit real protocols from past public contests on an individual timer, submit structured findings, and compare them with known results. True positives earn points; repeated false positives progressively cost points. The goal is not to reward silence. It is to make evidence-backed judgment part of the practice. Enter the Shadow Arena free:

An AI security auditor should not begin as one oversized prompt. It needs explicit choices: architecture → detection → reconnaissance → exploit context → verification → tools → output Zealynx Academy's AI Auditor Builder turns those choices into a 12-step build path. You finish by testing the skill against 5 planted Solidity vulnerabilities, publishing it, and benchmarking its unmodified output against real contest findings in the AI Auditor Arena. The useful lesson: a security tool is not proven when it produces findings. It is proven when its findings survive verification and measurement. Build yours free:

A security benchmark should show the learning loop, not just the winning score. Krait evolved through 8 methodology versions by running blind against historical smart-contract contests, comparing its output with known results, and turning every miss and false positive into a new pattern, heuristic, or verification gate. The measured v8 baseline now covers 50 contests at 100% precision with zero false positives per contest. That is a precision result, not a claim that every bug was found—and v8.1/v8.2 are explicitly marked as not yet re-measured. Inspect the methodology and limitations:

Not every Web3 loss starts with a smart-contract bug. Some start with a normal-looking action on a familiar surface: run this repo, verify this wallet, sign this message, or follow this urgent request. Zealynx Academy Defense turns those moments into safe recognition drills. Each scenario follows the same loop: briefing → live decision → debrief → concrete defense The useful skill is not memorizing the attack name. It is recognizing when an ordinary action crosses a dangerous boundary. Train on the public range:

When we applied to the Ethereum Security QF round on @Giveth, we made a simple promise: take whatever the community gives and turn it into more free security education, for more people. The round closed on May 15, the largest quadratic-funding matching pool ever run. Zealynx Academy came away with $3,027 in community donations, matched into 5.052 ETH more by @TheDAOfund's 500 ETH security pool, with @wintermute_t among the biggest backers. Here's what that support has built since. Zealynx Academy is free, and it stays free, no paywall, no premium tier. You don't watch videos or read slides. You rebuild real protocols line by line, guided by starter code and automated tests, until your code matches the original. Then you shadow-audit a real past contest of a fork of the thing you just built. Since the round closed on May 15, all of this shipped, all free: • 2 new build-from-scratch modules — Liquity V1 and Uniswap V3 • 11 new Shadow Arena audits of real protocol forks, with real contest bugs to hunt • 2 full "First 90 Days" courses — one for Web3, one for DeFi • A community Feed for everyone joining The platform now runs 5 build modules and 21 shadow audits, and every dollar you gave went to people and content, never overhead. What's next, funded by this round: more security modules built around real Ethereum exploits, lending, bridges, oracles, vaults, and AI/MCP security. Ethereum's security depends on a growing pipeline of builders who actually understand what they ship. Thank you to everyone who donated.

Thanks @ZealynxSecurity for awarding Yieldcoin v2 a 50% discounted audit grant. I am looking for a launch partner to help with funding. Open to any structure. v1 won grand prize in @chainlink hackathon. At a certain TVL, the operator just sits back and collects fees.

The most manipulable number in DeFi is a spot price. One flash loan moves it wherever an attacker wants for a block, and protocols that trusted it have lost hundreds of millions. This clip is 60 seconds from this morning inside Zealynx Insiders, a membership where we build the big protocols from scratch, live, together. Timed code challenges, a leaderboard, and the why behind every line. Right now we are midway through Uniswap V2, and in the clip we are building the TWAP oracle, its answer to price manipulation. I launched the membership 10 days ago. We are already 20 members. The founding rate, $20 a month locked for life, closes tomorrow. After that, it is $50.

Just went through @ZealynxSecurity "First 90 Days in Web3 " and it was truly a great read . A good starting point for beginners in web3 because it layouts the mind-map for what each sector in web3 is about , what problem they are trying to solve and some good security measures as a beginner in this space to know about.

I had joined community of @ZealynxSecurity . And we had our first session recently with @TheBlockChainer he told one point - when you learn something don't just keep it in notes - write articles or try to teach ( I don't remember exact words 😅) Tried, it really helped me to understand the concept more clearly Building and sharing learning public is real learning Thanks 🙏

Building UniswapV2 from scratch at @ZealynxSecurity is awesome . I am making it a commitment to hit 1 modules daily before any other task to really understand and absorb every context. Join me in this gamified journey and feel the experience yourself.

A full-time security learner told me yesterday: "I know exactly what the vulnerability means. I still can't find it in real code." Theory complete. Results zero. Sound familiar? He's not behind, he's at the exact wall everyone hits: courses teach you what bugs mean, nobody teaches you to find them in code you've never seen. And that wall doesn't fall alone, because alone you repeat your blind spots with confidence. So what's in it for you inside Zealynx Insiders? You benefit by learning WITH a working audit firm and people building real things, live sessions built around your actual blockers, not a fixed curriculum. You benefit by keeping everything: every session becomes a written playbook + full recording two hours after it ends. (Screenshot: this morning's.) You benefit by moving faster toward whatever you're becoming: a researcher landing first paid work, a builder shipping code that survives an audit, a founder who sees the risks before they cost you. That learner told me this inside the room. Now the whole room is working on it. That's the difference.

Zealynx Audit Grants, Season 1. Applications are closed. The numbers: • 8 protocols applied • 2 languages: Solidity and Rust • 6 chains: Ethereum, Base, Polygon, Solana, Arbitrum, Optimism • 4 continents What's in the pool: BTC-backed lending, cross-chain yield, escrow rails for West Africa, stablecoin remittances, RWA lending, prize savings vaults. What happens now: Every application goes through validity checks, then scoring. 100 points: product engagement, independent builder status, protocol merit. Same rubric for everyone, published since day one. Winners announced July 13. 1 full audit. 2 half audits. $100k+ pool.

Everyone talks about using AI to audit smart contracts. Almost nobody shows you how to build the tool. The AI Auditor Builder track is 12 steps to ship your own auditing agent. Pattern detection, tool integration, prompt engineering, the works. By the end you have a working tool, not a ChatGPT prompt.

Very excited to have among our first 6 members of Zealynx Insiders Membership people with different backgrounds from around the world, different experience, but with the same goal, Belong to the Zealynx Insiders family and grow together towards our goals. I’m super convinced that by the time we grow to 500+ members, these founding members will be leading the crowd and reaching their goals! Founding seats are limited. Pay 60% less now. $20/month