COTI_Official

Build the future of private AI agents. 60 days. 175,000 $COTI in prizes.
Intro to Agent Edition
AI agents are taking over on-chain. The merge of AI and blockchain has arrived, and it’s called Web4.
These agents are predicted to trade trillions and become the primary users of blockchain in the coming years. Billions of intelligent agents will autonomously execute trades, coordinate tasks, manage assets, and make decisions on-chain.
But there’s a problem. Without privacy, every agent’s identity, strategy, and transaction is fully visible. Copy-traded. Front-run. Exploited. The agentic economy can’t scale without highly-scalable, programmable privacy. That’s where you come in. COTI is launching the Vibe Code Challenge: Agent Edition — a 60-day open challenge for builders, tinkerers, and vibe coders to create private agentic apps and use cases on COTI.
What You’ll Get
COTI will give you the tools to build, help you sharpen your AI skills, and show you how to turn your agentic app into a real business.
Weekly Claude Code & Cowork Livestreams→ Step-by-step interactive vibe coding sessions with live Q&A → Dedicated focus on building with Claude Code & Cowork
Level Up Your Skills & Business→ Learn and improve your AI & vibe coding skills as you build → Tips, tools, and support to grow your app and drive real users → Turn your project into a real business with traction
A Community of Builders→ Dedicated Vibe Coding Telegram group → Support when you get stuck along the way
What You Can Build
Simple rule: If it’s agentic and built on COTI, it qualifies to win. Whether it’s a lightweight agent messaging app or a fully-loaded AI agent with on-chain superpowers — both count.
Embrace your creativity. Build something useful that can get traction. COTI will help the best projects grow users and become leaders in Web4.
Ideas for your Build:
AI Agent: A custom agent using COTI’s privacy stack, Agent Skills, MCP, or the Messaging SDK.
Agentic App: An application designed for AI agents that runs on the COTI network.
Agent Automation: An automated pipeline where agents coordinate, decide, and act independently.
Agent Infrastructure: A tool, SDK, template, or primitive that other agents or builders can use.
Build with COTI’s New Agent Stack
COTI just launched a full stack of on-chain privacy tools designed specifically for agents. Mint tokens, send messages, deploy NFTs, and more, all autonomously on the COTI network. COTI Agent Skills
A modular set of on-chain skills agents can use out of the box:
Account setup: Create or import a COTI wallet and generate the AES key that powers Garbled Circuit encryption.
Starter Grant: One-click gas funding for new agents. No COTI required to get started.
Private Messaging: End-to-end encrypted agent-to-agent messages on-chain. Only sender and recipient can decrypt.
Private ERC-20: Deploy a fungible token with encrypted balances. Public routing, private amounts.
Private NFTs: Deploy ERC-721 collections with private ownership and transfers.
Smart Contracts: Full Solidity lifecycle with COTI’s privacy primitives. Compile and deploy custom contracts with encrypted state.
Transaction Tools: Debugging, event decoding, balance management, and message signing.
→ Get the Skill MD: Here
COTI MCP
Two MCP servers that connect your agent to COTI’s privacy stack via the Model Context Protocol standard. Clean interoperability across any MCP-compatible framework. 48+ tools combined.
coti-mcp: Wallets, tokens, NFTs, smart contracts, and transactions. 30+ tools for deploying and managing private assets on-chain.
coti-agent-messaging: Encrypted agent-to-agent messaging, epoch-based rewards, and one-click starter grants. 18 tools.
→ Get the coti-mcp server:https://github.com/coti-io/coti-mcp
→ Get the coti-agent-messaging server:https://github.com/coti-io/coti-agent-messaging
COTI Private Messaging SDK
Already have an agent or stack? The TypeScript SDK installs in minutes and plugs into any agent runtime, including OpenAI, Claude, Hermes, and Manus.
Ideas to Get You Started
Not sure where to begin? Here are some concepts to spark your build:
Private Trading Agent — An autonomous trading agent that keeps its strategy encrypted on-chain. No front-running. No copy-trading.
Agent Messaging App — A chat app where agents communicate privately, end-to-end encrypted via COTI’s Messaging SDK.
Tokenized Agents — Mint a private token tied to an agent’s outputs, behavior, or access.
Private DeFi App — A DeFi app with encrypted balances and confidential transactions, usable by agents.
Agent-to-Agent Marketplace — Where agents discover each other, negotiate privately, and transact.
Private Token Rewards — Tools or an app that issues and rewards agents with private tokens.
🏆 Vibe Code Challenge Prizes
Total Prize Pool: 175,000 COTI Tokens
Three winners will be selected based on creativity, agentic integration, real utility, and completion of all submission steps.
🥇 1st Place: 100,000 $COTI
Plus additional perks for the top project:
Liquidity Kickstart on Bancor
Logo placement in the COTI Ecosystem
Feature on the COTI Privacy Paradigm Livestream
Ongoing marketing support from COTI
🥈 2nd Place: 50,000 $COTI
🥉 3rd Place: 25,000 $COTI
Judging Criteria
Creativity: Is it something new and innovative?
Agentic: Does it incorporate agents in a meaningful way?
Real utility: Does it have long-term value?
Completion: Are all submission steps complete?
How to Enter to WIN
Step 1: Build your agent app or use case using vibe coding tools and COTI’s privacy stack.
Step 2: Post a link to your app and a video demo on X and tag @COTInetwork.
Step 3: Submit your entry by completing the form linked below.
The challenge runs for 60 days from launch. Only completed submissions are eligible for prizes. Agentic apps or use cases do not need their own token, though tokenized rewards are welcome.
Start Building
Visit the Vibe Code Challenge landing page to start building. Get the Agent Skills, grab the SDK or MCP and create something creative and innovative. Keep improving it with our community & submit your entry. We can’t wait to see what you build.
Join the Vibe Code Challenge → Here
Join the Vibe Code Telegram Community Connect with other builders and share ideas → Here.
Stay COTI.
About COTI:
COTI is the programmable privacy layer for Web3. Built for enterprises, builders, and agents. Powered by high-performance Garbled Circuits and enterprise-grade COTI Nightfall (ZK), COTI enables encrypted computation on any public blockchain. Fast, low-cost, and compliant privacy across DeFi, AI, and beyond.
For COTI updates and to join the conversation, be sure to check out our channels:
Website: https://coti.io/
X: https://twitter.com/COTInetwork
YouTube: https://www.youtube.com/channel/UCl-2YzhaPnouvBtotKuM4DA
Telegram: https://t.me/COTInetwork
Discord: https://discord.gg/9tq6CP6XrT
GitHub: https://github.com/coti-io
Vibe Coders Telegram: https://t.me/+uuPNfRkKiQ03ZTcx

Public to private. Send private. Private back to public. One wallet. Four clicks.
TL;DR
→ Take a public token on COTI and make it private in one click via the Privacy Portal
→ View and send your private balance directly inside MetaMask through the COTI Snap
→ Convert private tokens back to their public form whenever you choose
→ End-to-end onchain privacy powered by Garbled Circuits
Private Token Loop
COTI has introduced a full-private token lifecycle all within a single wallet. Take a top public token, bridge it to COTI Network and then you can make it totally private. Use the COTI Privacy Portal to make top tokens private in a single click. Hold and send your private tokens with a balance only revealed to you.
Once you’re ready to make your tokens public once again, turn your private tokens back to public in a single click. Easy, simple and all within your wallet.
Here is the full loop in four screenshots.
1. Pick a public token at privacy.coti.io
Open the Privacy Portal and select a public token from the Public Tokens panel. The Portal supports COTI, wETH, wBTC, USDT, USDC.e, wADA, and gCOTI. Choose an amount, click Portal In, and approve the transaction in MetaMask.
2. See your private balance in MetaMask
Once the conversion confirms, your tokens are now private. The balance is encrypted on-chain and visible only to you through the COTI MetaMask Snap. Open MetaMask and your private balance is right there in the wallet you already use, decrypted locally on your device.
3. Send privately from MetaMask
Click Send Token in the Snap, enter a recipient on the COTI Network, and approve the transaction. The transfer is encrypted, on-chain, and confirmed at the lowest cost and fastest speed of any private token transfer, a fraction of a penny in gas.
4. Portal Out back to public
Return to the Privacy Portal, select the private token from the Private Tokens panel, and click Portal Out. Approve the transaction. Your tokens return to their original public form on the COTI Network, fully liquid, fully under your control.
The Power of End-to-End Privacy
Most privacy systems are difficult and challenging to use. Forcing users to decide whether to keep their assets public or private. With COTI, the ease of use is so simple your tokens can easily move between public and private, in an open loop.
Every step happens on the same network, in the same wallet, with the same keys. The Privacy Portal handles the conversion. The COTI MetaMask Snap handles holding, sending, and receiving. Together they give users a complete privacy lifecycle for any supported token, with the option to enter or exit at any moment.
That is what programmable privacy looks like in practice. Not a sealed-off zone, but a switch you control.
Try the Loop
Open the Privacy Portal: privacy.coti.io
Install the COTI MetaMask Snap: metamask.coti.io/install
Need tokens on COTI first? See the Ultimate Bridging Guide.
Stay COTI.
About COTI:
COTI is the programmable privacy layer for Web3. Built for enterprises, builders, and agents. Powered by high-performance Garbled Circuits and enterprise-grade COTI Nightfall (ZK), COTI enables encrypted computation on any public blockchain. Fast, low-cost, and compliant privacy across DeFi, AI, and beyond.
For COTI updates and to join the conversation, be sure to check out our channels:
Website: https://coti.io/
X: https://twitter.com/COTInetwork
YouTube: https://www.youtube.com/channel/UCl-2YzhaPnouvBtotKuM4DA
Telegram: https://t.me/COTInetwork
Discord: https://discord.gg/coti-foundation
GitHub: https://github.com/coti-io
Vibe Coders Telegram: https://t.me/+uuPNfRkKiQ03ZTcx

Today, we’re excited to announce an official partnership between COTI and Midnight Foundation, an organisation dedicated to advancing the development, adoption, and real-world impact of the Midnight Network, a privacy-first blockchain built by Shieleded Technologies.
Together, COTI and Midnight will collaborate to bridge and broaden the privacy landscape, advance industry standards, and work together to grow a global privacy ecosystem that serves builders, enterprises, and users.
This partnership brings together two of the most prominent privacy protocols in Web3, each with distinct and complementary technology, united by a shared mission: making privacy a foundational layer of blockchain.
What We’re Building Together
This is a strategic alignment between two privacy-native protocols to push the entire ecosystem forward.
COTI and Midnight will actively collaborate on:
Privacy standards development: Joint contributions to best practices and frameworks that define how to build using privacy on-chain.
Cross-chain composability: Enabling the interoperability of our privacy protocols and tokens, unlocking new use cases across both ecosystems.
Builder and enterprise empowerment: Enabling developers and institutions to leverage industry-leading privacy technology from both Midnight’s zero-knowledge architecture and COTI’s Garbled Circuits.
Privacy research and joint marketing: Advancing the shared mission of making privacy mainstream through collaborative research and awareness initiatives.
NIGHT Token Live on the COTI Network
The NIGHT token, Midnight’s native governance token, is already live on the COTI Network. NIGHT token was bridged via ChainPort in January of 2026 (Full Article).
COTI bridged NIGHT to their native network and ecosystem to expand the liquidity and utility for builders, traders, and participants of the Global privacy ecosystem.
The Rise of Midnight
Midnight Network is a next-generation privacy blockchain built by Shielded Technologies. Shielded Technologies is an emerging engineering company pioneering privacy-enhancing, decentralized technologies for real-world adoption. As a spinout from leading web3 venture studio Input Output, the company serves as the core technology partner to the Midnight Foundation, building the foundational infrastructure powering the Midnight network.
Midnight restores the original promise of crypto and aims to be the architecture of freedom. No one should be forced to choose between utility and privacy.
Unlike privacy coins that obfuscate transactions, Midnight combines zero-knowledge cryptography (ZK-SNARKs) with selective disclosure tooling, enabling developers and users to retain privacy where needed while staying compliant and auditable. Its hybrid-ledger design separates public and private data, supporting seamless interactions between transparent and confidential logic.
The NIGHT token launched in late 2025, and Midnight’s mainnet is scheduled for launch in late March 2026.
A Shared Privacy Mission & Philosophy
COTI and Midnight represent two of the most advanced approaches to privacy in Web3.
COTI’s Garbled Circuits deliver high-performance, scalable and cost-effective encrypted computation, fully EVM-compatible, and purpose-built for DeFi, RWAs, and enterprise use cases.
Midnight’s zero-knowledge architecture enables programmable smart contracts where sensitive information remains encrypted end-to-end, yet verifiable, with precise control over data disclosure.
Both COTI & Midnight approach solving the challenges of privacy and pursuing adoption with similar philosophies.
Programmable privacy gives builders and enterprise users selective control over what data is revealed and concealed.
Developer-friendly tooling supporting the creation of privacy-preserving apps with the latest in AI tooling for broader adoption.
Confidentiality as a fundamental feature in DeFi, private payments, identity management, enterprise data protection, and real-world asset tokenization.
The combined capabilities of both protocols is positioned to serve builders and institutions across virtually every category. By aligning together, we’re creating an ecosystem where the rise of privacy benefits everyone.
Why This Matters & What’s Next
Privacy is the single biggest unlock for mainstream blockchain adoption. Institutions will not move sensitive financial data on-chain without confidentiality. Users will not trust systems that expose every interaction. Builders need real privacy tools to create products people actually want to use.
By connecting two of the leading privacy ecosystems, we’re expanding the range of privacy tools available to builders and setting standards that can accelerate institutional adoption.
We’re on a mission to make privacy the default, not the exception. Together with Midnight, we’re moving that vision forward.
About Midnight Foundation
The Midnight Foundation is an organisation dedicated to advancing the development, adoption, and real-world impact of the Midnight network, the privacy enhancing blockchain project developed by Shielded Technologies. Designed for confidential smart contracts, Midnight enables censorship-resistant yet compliant decentralised applications. It leverages zero-knowledge proofs and a cooperative tokenomics architecture — with NIGHT as the utility token and DUST as the shielded capacity resource — to deliver a powerful combination of privacy, security, and decentralization.
Learn more about Midnight at midnight.network and follow their journey on X.
About COTI
COTI is the programmable privacy layer for Web3. Built for enterprises, builders, and agents. Powered by high-performance Garbled Circuits and enterprise-grade COTI Nightfall (ZK), COTI enables encrypted computation on any public blockchain. Fast, low-cost, and compliant privacy across DeFi, AI, and beyond.
For COTI updates and to join the conversation, be sure to check out our channels:
Website: https://coti.io/
X: https://twitter.com/COTInetwork
YouTube: https://www.youtube.com/channel/UCl-2YzhaPnouvBtotKuM4DA
Telegram: https://t.me/COTInetwork
Discord: https://discord.gg/coti-foundation
GitHub: https://github.com/coti-io
Vibe Coders Telegram: https://t.me/+uuPNfRkKiQ03ZTcx

This week, a Claude Opus 4.8 audit found a four-year-old flaw in one of crypto’s most trusted privacy systems. Here is how and why COTI is built on a different foundation.
TL;DR
→ This week, Shielded Labs disclosed a critical bug in Zcash’s Orchard shielded pool, found with the help of Anthropic’s Claude Opus 4.8. → A single under-constrained element in a complex ZK circuit went undetected for four years, and privacy made it impossible to prove whether it was ever exploited. → COTI is built on a different foundation: Garbled Circuits, encrypted multi-party computation on battle-tested symmetric-key cryptography, with no soundness-critical proving circuit, no trusted setup, and quantum resistance by design. → COTI’s programmable privacy is verifiable by design. Selective disclosure lets supply and integrity be proven without exposing anyone’s data. → Private ERC20 supply stays governed and auditable.
A Wake-Up Call for Web3 Privacy
This week, the world of crypto privacy got a wake-up call.
Shielded Labs, the nonprofit that funds Zcash development, disclosed a critical soundness bug in Zcash’s Orchard shielded pool, one of the most respected zero-knowledge privacy systems in production.
The flaw was discovered using a custom auditing framework paired with Anthropic’s newly released Claude Opus 4.8. The flaw had been hiding in the proving circuit since Orchard launched in May 2022. For nearly four years, it sat undetected through repeated audits by some of the best cryptographers in the field.
The response was fast and coordinated. An emergency soft fork temporarily disabled Orchard transactions, and the hard fork corrected the circuit. That deserves real credit. Responsible disclosure, a patch within days, and full transparency are exactly how security is supposed to work.
Building trust within the privacy ecosystem is critical. A safe, reliable and secure privacy industry is key to uplift the entire ecosystem. Since blockchain privacy is a new breakthrough technology, it must continuously be hardened by the latest AI tools.
This is COTI’s design philosophy behind Garbled Circuits and the commitment to always ensuring industry-leading encryption standards.
Why This Matters Beyond Zcash
The story is bigger than any one network, and it lands on two hard truths every privacy protocol has to face.
Complex circuits are extraordinarily hard to get perfectly right. The flaw was an under-constrained element in the proving circuit: a check that was supposed to reject invalid inputs but contained a gap. Security researchers have long flagged under-constrained circuits as one of the most common failure classes in zero-knowledge audits, with the majority of ZK audit findings tracing back to the circuit layer.
Privacy can make verification impossible. Because Orchard is a shielded pool, Shielded Labs acknowledged there is no way to cryptographically determine whether the flaw was ever exploited. The same property that protects users also removes the trail that would let anyone prove the books are clean. You are left to take it on trust.
Claude Opus 4.8 audit found in about a day what years of expert human review missed. Every protocol will now be probed by the same class of tooling, by defenders and attackers alike, but simultaneously can use these tools to harden their infrastructure.
All privacy protocols must ensure their encryption and security standards are continuously improved and audited to ensure the highest-level of safety.
How COTI Is Built Different
COTI took a different cryptographic route from the ground up: Garbled Circuits, a protocol for secure multi-party computation (MPC), developed with Soda Labs.
Smart contracts compute directly on encrypted inputs, so the data is never exposed, not to an operator, not to the network, not to anyone who should not see it. That choice changes the security model in ways that matter right now.
MPC on encrypted inputs, not under-constrained ZK circuits
A zero-knowledge system proves a statement about hidden data using a complex circuit, and the soundness of that circuit is everything. One under-constrained constraint, as Orchard showed, can let invalid inputs pass.
COTI works differently. With Garbled Circuits, contracts compute on encrypted inputs through secure multi-party computation, and execution validity is checked by the COTI mainnet. There is no single soundness-critical proving circuit standing between you and the integrity of the whole pool.
Symmetric-key cryptography
COTI’s garbling scheme is built on the most studied, battle-tested primitives in cryptography. It applies a pseudo-random function such as AES to circuit wire labels, and on-chain ciphertexts are protected by a symmetric encryption scheme. These are the same families of primitives that secure the modern internet.
New privacy capabilities on top of trusted, well-understood building blocks, rather than a novel circuit that has to be proven flawless.
No trusted setup required
Some privacy systems depend on a one-time trusted setup ceremony. If the secret behind that ceremony is ever mishandled, the security of the whole system can be undermined. The Garbled Circuits approach requires no such ceremony. That removes an entire class of risk before a single transaction is processed.
Quantum-resistant by design
Because the foundation is symmetric-key cryptography, resistance to quantum attacks is a matter of key length, not a redesign. The best known quantum attacks on symmetric primitives use Grover’s algorithm, which roughly halves effective security, so doubling the key length restores it.
COTI’s Helium upgrade introduced native 256-bit arithmetic, so COTI’s confidential tokens already run at the key sizes that keep them secure against the best known quantum attacks. For the full breakdown, read COTI’s technical deep-dive on quantum computing.
And it is practical
The cryptography is strong, and it is usable. Confidential computation on COTI is up to 3,000x faster and 250x lighter than FHE-based approaches, light enough for any device including mobile, with no specialized hardware.
And COTI’s gcEVM is fully EVM-compatible, so developers write confidential contracts in standard Solidity, choosing what stays private and what goes public inside a single contract.
Verifiable by Design
The hardest part of this week’s story is not the bug. Bugs get patched. It is that no one can cryptographically prove whether the supply was ever inflated. That is the trap privacy systems can fall into: confidentiality that comes at the cost of verifiability.
COTI’s thesis has always been that transparency was never the real goal. The goal is the ability to verify information independently, which modern cryptography can deliver without exposing everything to the public.
With programmable privacy, COTI lets the right parties verify exactly what they need, supply, solvency, or compliance, through selective disclosure, while everyone else sees only ciphertext.
You can see it directly in Private ERC20s, COTI’s privacy-enhanced token standard:
Encrypted by default. Balances, transfer amounts, and allowances are encrypted. Each holder has their own key, and only the holder can decrypt their balance. Validators see ciphertext.
Private, but accountable, supply. totalSupply() returns zero on-chain, while a ciphertext version tracks the real supply internally. No leaking issuance to the outside world, and no blind spot either.
Governed issuance. Role-based access control, a dedicated minter role, and cap-aware issuance make supply governance explicit and auditable, with selective disclosure for compliance.
Proven foundations. Access control and reentrancy protection inherited from OpenZeppelin, encrypted arithmetic delegated to COTI’s MPC precompile, with full 256-bit precision.
This is privacy that does not force a choice between confidentiality and the ability to prove the truth. That is the difference between privacy you can verify and privacy you have to take on blind faith.
Audited End to End, and Leaning Into AI
Strong cryptography still has to be proven at the code level. No privacy technology is exempt from rigorous, ongoing review, which is exactly why COTI treats security as continuous.
Sayfer, a Web3-native cybersecurity consultancy that has secured billions in assets across 100+ clients including MetaMask, 1inch, Polkadot, and StarkWare, with zero client hacks to date, has audited COTI’s privacy stack line by line: Private ERC20, the Privacy Portal, and the COTI MetaMask Snap. Every finding was addressed and resolved before launch.
“After a review by the Sayfer team, we certify that all the security issues mentioned in this report have been addressed by the COTI team.” Sayfer audit report
Sayfer is building an AI-powered security layer for continuous, real-time auditing that moves past the point-in-time model, and COTI is a long-term partner in that work. When advanced AI red-teaming becomes standard across the industry, COTI intends to always utilize the latest technology
Live & In-Production Privacy.
Ethereum Co-founder Vitalik Buterin has publicly pointed to Garbled Circuits as the path to pure-cryptographic security guarantees for multi-party computation.
COTI’s GC mainnet launched in March 2025 and has processed 125 million+ on-chain transactions. COTI is bringing its GC-powered privacy protocol natively to Ethereum, and other leading L1s & L2s.
For major blockchains, DeFi, and dapps that need reliable, proven privacy that is audited and verifiable, COTI intends to be the industry-leader in trusted solutions.
Why COTI Is Unique
COTI is built so that trust in privacy does not depend on a promise:
Computes on encrypted inputs through MPC, with no single soundness-critical proving circuit.
Built on battle-tested symmetric-key cryptography.
Requires no trusted setup ceremony.
Quantum-resistant by design, with native 256-bit key sizes already live.
Verifiable by design, with selective disclosure and governed, auditable supply.
Audited end to end by Sayfer, with continuous AI-assisted auditing on the way.
Live in production, fully EVM-compatible, and light enough to run on any device.
Trust Is Earned at the Foundation
The rise of privacy across Web3 is good for everyone, and the teams advancing it, including the team that handled this week’s disclosure with speed and honesty, deserve respect.
But “privacy” is not a single protocol or solution, and the differences deserve the whole story. COTI’s answer is to keep computation encrypted end-to-end, build on cryptography that has already earned trust, make privacy verifiable rather than something you take on faith, and never stop hardening it.
As the field moves, COTI moves with it: doubling key lengths ahead of quantum, adopting the strongest available methods of encryption, and pairing every release with continuous, AI-assisted security review. Privacy is not a feature you ship once. It is a standard you defend every day.
That is what it means to be the programmable privacy layer for Web3.
Stay COTI.
About COTI:
COTI is the programmable privacy layer for Web3. Built for enterprises, builders, and agents. Powered by high-performance Garbled Circuits and enterprise-grade COTI Nightfall (ZK), COTI enables encrypted computation on any public blockchain. Fast, low-cost, and compliant privacy across DeFi, AI, and beyond.
For COTI updates and to join the conversation, be sure to check out our channels:
Website: https://coti.io/
X: https://twitter.com/COTInetwork
YouTube: https://www.youtube.com/channel/UCl-2YzhaPnouvBtotKuM4DA
Telegram: https://t.me/COTInetwork
Discord: https://discord.gg/coti-foundation
GitHub: https://github.com/coti-io
Vibe Coders Telegram: https://t.me/+uuPNfRkKiQ03ZTcx