Avail

$10,000 prize pool · Gold · 10 prizes awarded

Best DeFi or Payments app with Avail Nexus SDK

$5,000

1st $2,000 · 2nd $1,500 · 3rd $1,000 · 4th $500

A CronPay1st place · $2,000
A Siphon Protocol2nd place · $1,500
A Neutrino3rd place · $1,000
A GasPass4th place · $500

Prize details

This one is an interesting track for devs to experiment and innovate. If you’re building a project focused on DeFi, Payments, or agentic payments, then this track is for you! Integrate crosschain intents with Avail Nexus SDK into your app in a meaningful manner. Utilize powerful features like "Bridge & Execute", or "XCS Swaps (crosschain swaps)" to build your app. Rethink how DeFi or Payment rails are built. Build innovative solutions. Example Ideas: - Adaptive Yield Router: what if users can move their idle stables to best APY anywhere; weekly replace intents with checking all guardrails such as slippage, gas ceiling etc. At a click of a button by a user. - Payroll & Splits: Pay your team across any chain with any token. Abstract and consolidate funds from anywhere. - An app that allows you to deposit unified USDC/USDT on the highest yield generating market on Aave/Morpho - A browser extension that allows you to spend unified eth to stake on Lido

Qualifications

Qualification requirements: - README that clearly defines how Avail Nexus SDK is used - Meaningful use of Nexus SDK (nexus-core, nexus-widgets, or nexus-elements) - Show a demo of a crosschain intent interaction on the app. - Bonus points if you use Nexus SDK features like “Bridge & Execute” in the project.

Build Unchained Apps with Avail Nexus SDK (General Track)

$4,500

1st $2,000 · 2nd $1,250 · 3rd $750 · 4th $500

A CiFHErTradeArena1st place · $2,000
A Nexus Explorer2nd place · $1,250
A MergeFi3rd place · $750
A UniVail4th place · $500

Prize details

For this track, devs are free to build anything, any dapp or usecase powered by Avail Nexus. Develop any innovative and efficient app across any vertical that seamlessly integrates the Avail Nexus SDK to share and transfer liquidity across chains. Example Ideas: - Unified gas refuel: “top up gas on X chain” or refuel for any token. similar to smolrefuel.com but with Nexus integrated and better pricing. - Intent playground: Visual Composer to drag/drop steps and simulate cost/latency before submitting - Intent explorer: Uses Nexus SDK intents and creates an explorer for navigating through a wallet’s intents. - A browser extension that allows you to spend unified eth to stake on Lido - An app that allows you to deposit unified USDC/USDT on the highest yield generating market on Aave/Morpho

Qualifications

- README that clearly defines how Avail Nexus SDK is used - Meaningful use of Nexus SDK (nexus-core, nexus-widgets, or nexus-elements) - Show a demo of a crosschain intent interaction on the app. - Bonus points if you use Nexus SDK features like “Bridge & Execute” in the project.

Developer Feedback (Test our Docs)

$500

$250 × 2 winners

A DeFolio$250
A PayStream$250

Prize details

This is a special bounty for EthOnline builders! We want YOU, hackers, to test our docs. We want honest feedback! Test out the Avail Nexus SDK in your projects. Give us with any feedback as you try to build with it. If you feel like something is missing or hard to find on the docs, let us know! Add images, videos, anything to get the point across. Add your feedback to AVAIL_FEEDBACK.md in your submission repo.

Qualifications

Hackers need to: - Go through the documentation of Avail Nexus SDK - Create a AVAIL_FEEDBACK.md file in your existing Project repo or create a new Github repo and provide the feedback in it. - Upload the screenshots or any supporting material to get the point across. - Make it as detailed as possible.

B

Blockscout

$10,000 prize pool · Gold · 7 prizes awarded

Best use of Autoscout self-service explorer launchpad

$3,500

1st $2,000 · 2nd $1,000 · 3rd $500

B PetPet1st place · $2,000
B BugChan2nd place · $1,000
B StakED3rd place · $500

Prize details

Use Autoscout to launch a customizable explorer for your chain in 5 minutes! You will use Autoscout as a way to launch an explorer for your chain or related to your hackathon project. This will let you track transactions, access the API and more. Autoscout supports any EVM-based L1s and L2 rollups. To participate:   1) Create an account: To get started, go to https://deploy.blockscout.com/, create an account, and login to get started. 2) Request credits in the EthGlobal Discord Channel. Share your email to request and we will top off your account for the hackathon. 3) Add a new instance. Click the Add instance button to get started and then add your network info. You can connect to any EVM-based chain or rollup with an available RPC. Configs and parameters are available in the docs.

Qualifications

We will judge entries based on the overall project and use case. You can apply for this bounty with any project as long as you also use Autoscout to launch an explorer. Projects must use Autoscout and launch an explorer to be eligible for prize consideration.

Best use of Blockscout MCP (Vibecode an app OR create a great prompt)

$3,500

1st $1,250 · 2nd $500

B brexo2nd place App | 2nd place Prompt · $500
B Wallet Whisperer1st place App | 1st place Prompt · $1,250

Prize details

Use Blockscout's MCP to: 1) Vibe Code an app with Blockscout! Build an app that uses the Blockscout MCP Server as its source of blockchain intelligence. The MCP provides multichain data and is ready for AI reasoning and contextual analysis. Via the Model Context Protocol (MCP): Connect the Blockscout MCP Server to an agent that uses an LLM under the hood. Your app should compose around this agent - letting it query, analyze, and interpret blockchain activity through MCP tools. Direct REST API-only use is allowed but will score lower - the focus is on AI reasoning with blockchain data, not raw API calls. Example ideas: - A Telegram bot that summarizes wallet activity and explains transactions using LLM reasoning - A chatbot widget that provides conversational blockchain analytics on any website or app - A higher-level MCP server that wraps Blockscout MCP into a single tool - An autonomous agent that inspects and interprets smart contract source code through the MCP 2) Create a super prompt with Blockscout MCP for comprehensive blockchain analyses. Develop a prompt (for ChatGPT, Claude etc) that allows us to dig deep into blockchain data. We've developed simple some simple prompts like "Tell me about a specific transaction, or show me token approvals for this address", but we are looking for comprehensive, in-depth prompts. For example,. prompts that provide a full-account analysis, chain-of-custody research or other in-depth analysis.

Qualifications

App prizes will be awarded based on overall idea, creativity, and interactivity with blockchain data via Blockscout. Vibe code app prizes will be validated for MCP use through source code checks and our analytics services which track MCP server requests. Prompt prizes will be awarded based on their generalizability, usefulness, and ability to produce impressive results with the MCP server. We should be able to run your reusable prompts in ChatGPT/Claude to get similar results for different accounts, transactions, or user operations.

Best Blockscout SDK Integration

$3,000

1st $2,000 · 2nd $1,000

B Better Wallet1st place · $2,000
B Synced Streams2nd place · $1,000

Prize details

Integrate the new Blockscout SDK into your app and provide interactivity and instant explorer feedback to your users. Easy integration + valuable UI enhancements = best usage! Instructions on installation and usage available in the docs.

Qualifications

To win this prize you need to use the new Blockscout SDK in a relevant way inside your project.

AS

Artificial Superintelligence Alliance

$10,000 prize pool · Presenter · 5 prizes awarded

Best use of Artificial Superintelligence Alliance

$10,000

1st $3,500 · 2nd $2,500 · 3rd $1,750 · 4th $1,250 · 5th $1,000

AS Nette-Fi1st place · $3,500
AS NeriaAI2nd place · $2,500
AS StableGuard.AI3rd place · $1,750
AS EchoLink4th place · $1,250
AS ValueGuard Token5th place · $1,000

Prize details

First Place – $3,500 Awarded to the team that shows the most effective and creative use of ASI:One for human–agent interaction, paired with MeTTa for structured reasoning. Judged on problem choice, solution quality, and real-world impact. Second Place – $2,500 Awarded to the team with the most impactful, well-presented launch on Agentverse. Your listing should be easy to find via ASI:One and clearly explain how MeTTa powers your logic. Judges look for usability, discoverability, clear purpose, and adoption potential. Third Place – $1,750 Awarded to the team that builds the most cohesive multi-agent system using Fetch.ai agents and MeTTa for shared knowledge and reasoning. We’ll evaluate how smoothly agents communicate, collaborate, and coordinate complex tasks across chains and environments. Fourth Place – $1,250 Awarded to the team that delivers the most innovative demonstration of agent collaboration within the ASI:One ecosystem. Judges will look for originality, technical depth, and potential for future scalability. Fifth Place – $1000 Awarded to the team with the most polished user-facing experience that makes advanced human–agent interaction intuitive and engaging. Judged on design quality, accessibility, and clarity of value to end users.

Qualifications

1. Functionality & Technical Implementation (25%) - Does the agent system work as intended? - Are the agents properly communicating and reasoning in real time? 2. Use of ASI Alliance Tech (20%) - Are agents registered on Agentverse? - Is the Chat Protocol live for ASI:One? - Does your solution make use of uAgents and MeTTa Knowledge Graphs tools? 3. Innovation & Creativity (20%) - How original or creative is the solution? - Is it solving a problem in a new or unconventional way? 4. Real-World Impact & Usefulness (20%) - Does it solve a meaningful problem? - How useful would this be to an end user? 5. User Experience & Presentation (15%) - Is the demo clear and well-structured? - Is the user experience smooth and easy to follow? - The solution should include comprehensive documentation, detailing the use and integration of each technology involved.

H

Hedera

$10,000 prize pool · Gold · 5 prizes awarded

Best Use of Hedera Agent Kit & Google A2A

$4,000

1st $3,000 · 2nd $1,000

H Vision Pay1st place · $3,000
H SmartMarket2nd place · $1,000

Prize details

Create one or more agents using the Hedera Agent Kit that can send and receive A2A messages and, if appropriate, settle payments via AP2 using Hedera tokens. For example, an AI travel agent might negotiate bookings with other agents and pay with stablecoins.

Qualifications

1. Multi‑agent communication — implement message exchange using the A2A standard. 2. Agent Kit integration — build your agents with the Hedera Agent Kit and its adaptors. 3. Open‑source deliverables — publish code and documentation; include a demo video illustrating agents negotiating via A2A/AP2 and settling on Hedera. Bonus points for using multiple Hedera services or advanced features like human‑in‑the‑loop modes.

EVM Innovator Track

$4,000

H KINXP$4,000

Prize details

Hedera’s EVM compatibility allows developers to write Solidity contracts while benefiting from fast finality and low fees. This bounty is about using cross‑chain and real‑world data to build innovative dApps. Example ideas include multi‑chain financing, cross‑chain auctions or data‑driven trading bots.

Qualifications

1. Deploy and verify a smart contract on Hedera — use Hedera mainnet, testnet or previewnet; verify contracts on Hashscan. 2. Integrate oracles and/or bridges — consume external price feeds from Chainlink, Pyth or Supra, and/or use Chainlink CCIP, LayerZero or HashPort for cross‑chain transfers. 3. Use Hedera services where relevant — consider HTS System Contracts or the Token Service for hybrid native/EVM functionality. 4. Deliverables — provide open‑source code, a clear README and a demo video. Bonus points for combining multiple oracles/bridges, integrating Hedera wallet flows (HashPack, Kabila, MetaMask Snap), or offering a novel real‑world use case.

Best Hedera x Lit Protocol Vincent Ability

$1,000

1st $1,000

H SaucerHedge1st place · $1,000

Prize details

This challenge asks builders to create a Vincent “ability” that uses Hedera services and Lit Protocol’s Vincent framework. Vincent provides secure agent identity, verifiable capability delegation and secure action execution via Lit’s threshold cryptography. The skill should use Hedera services such as EVM smart contracts, the Token Service or Consensus Service. Examples include automated staking strategies, token swaps or delegated payments.

Qualifications

1. Use at least one Hedera service — EVM Smart Contracts, Token Service, Consensus Service, Scheduled Transactions, or the Hedera Agent Kit. Smart contracts must be verified on Hashscan. 2. Integrate Vincent — register your agent/app, define tools and capabilities, and use the Vincent SDK. 3. Deliverables — open‑source code in a public repo, a README explaining architecture and dependencies, and a demo video (≤ 5 minutes) showing how a user delegates permissions and the skill executes actions. Bonus points for using multiple Hedera services or cross‑chain integrations.

Best Plug‑In for Hedera Agent Kit

$1,000

H Hedera Agent Trust$1,000

Prize details

The Hedera Agent Kit supports a plugin architecture that allows developers to add new tools and integrate third‑party services. This bounty rewards the most useful and well‑architected new plugin that introduces new capabilities. Plugins might wrap external APIs (e.g., DeFi protocols, data providers), simplify token operations, or provide analytics and monitoring.

Qualifications

1. Follow the plugin architecture — your plugin must adhere to the Hedera Agent Kit’s plugin interface and be installable via npm or similar. 2. Provide clear documentation — include setup instructions, available tools and example usage. Explain how the plugin interacts with Hedera and any external services. 3. Demonstrate utility — build a small sample agent showing how the plugin is used. If the plugin interfaces with Hedera network services, ensure contracts are verified and transactions are signed appropriately. 4. Deliverables — publish the plugin code and example project under an open‑source licence, supply a README and a short demo video. Bonus points for interoperability with other agent ecosystems or for integrating real‑world data sources.

PU

PayPal USD

$10,000 prize pool · Gold · 3 prizes awarded

Grand Prize (Best Overall Transformative Use of PYUSD)

$4,500

PU Monkey Bridge$4,500

Prize details

Awarded to the project that most convincingly demonstrates a powerful and scalable real-world use case for PYUSD. The winner will set a new benchmark for digital payments, showing how PYUSD unlocks unique value—whether by powering global remittances, revolutionizing commerce, or creating new economic opportunities. Each Project Submission will be judged by a panel of judges in accordance with the following criteria: (a) Functionality: How well does this Project Submission work? What is the quality of the code? (b) Payments Applicability: How effectively does the solution address real-world payment challenges? (c) Novelty: How unique is this Project Submission’s concept? (d) UX: How well does this Project Submission utilize PYUSD’s performance and unique proposition to create great UX for downstream users? (e) Open-source: Is this Project Submission open-source? How well does the Project Submission compose with other primitives in the ecosystem? (f) Business Plan: Is there a viable business that can be built in the future around this Submission?

Qualifications

1. Submission must clearly demonstrate utilization of PYUSD (deployed on mainnet or testnet) 2. Project must be newly built and deployed. 3. Include a public code repo; if private, share access credentials 4. Submit a 2–4 minute demo video explaining and showcasing the project 5. Project must be original

PYUSD Consumer Champion (Best Consumer-Focused Payments Experience)

$3,500

PU GreenStake DEX$3,500

Prize details

This prize recognizes the project that builds the most seamless and engaging consumer payment experience with PYUSD at its core. From streamlining cross-border settlements, to enabling microtransactions, programmable subscriptions, or “pay-as-you-go” economics, we want to see fresh ideas that push the boundaries of what’s possible in digital payments. Think outside the box—your solution should inspire new thinking for the entire PYUSD ecosystem. Each Project Submission will be judged by a panel of judges in accordance with the following criteria: (a) Functionality: How well does this Project Submission work? What is the quality of the code? (b) Payments Applicability: How effectively does the solution address real-world payment challenges? (c) Novelty: How unique is this Project Submission’s concept? (d) UX: How well does this Project Submission utilize PYUSD’s performance and unique proposition to create great UX for downstream users? (e) Open-source: Is this Project Submission open-source? How well does the Project Submission compose with other primitives in the ecosystem? (f) Business Plan: Is there a viable business that can be built in the future around this Submission

Qualifications

QUALIFICATIONS AND REQUIREMENTS: 1. Submission must clearly demonstrate utilization of PYUSD (deployed on mainnet or testnet) 2. Project must be newly built and deployed. 3. Include a public code repo; if private, share access credentials 4. Submit a 2–4 minute demo video explaining and showcasing the project 5. Project must be original

PYUSD Possibilities Prize ( Most Innovative Use Case of PYUSD )

$2,000

PU DevQuest$2,000

Prize details

This award honors creative thinkers who push the boundaries of where and how PYUSD can be used in applications—whether social, gaming, education, finance, or something completely unexpected. This is all about thinking outside the wallet and uncovering new ways digital dollars can unlock value in apps and platforms. Whether it’s a beautifully designed wallet, a seamless onboarding journey, or something that goes viral within the community, this prize celebrates projects that put people first. Each Project Submission will be judged by a panel of judges in accordance with the following criteria: (a) Functionality: How well does this Project Submission work? What is the quality of the code? (b) Payments Applicability: How effectively does the solution address real-world payment challenges? (c) Novelty: How unique is this Project Submission’s concept? (d) UX: How well does this Project Submission utilize PYUSD’s performance and unique proposition to create great UX for downstream users? (e) Open-source: Is this Project Submission open-source? How well does the Project Submission compose with other primitives in the ecosystem? (f) Business Plan: Is there a viable business that can be built in the future around this Submission?

Qualifications

1. Submission must clearly demonstrate utilization of PYUSD (deployed on mainnet or testnet) 2. Project must be newly built and deployed. 3. Include a public code repo; if private, share access credentials 4. Submit a 2–4 minute demo video explaining and showcasing the project 5. Project must be original

E

Envio

$5,000 prize pool · Ruby · 5 prizes awarded

Best AI + Envio Tooling Project

$1,500

$750 × 2 winners

E HyperMCP$750
E Syntra$750

Prize details

For the most compelling AI-powered project that enhances or integrates with Envio’s data stack (HyperIndex or HyperSync). Examples: • AI-assisted tools for building or querying HyperIndex / HyperSync • AI-driven subgraph-to-HyperIndex converters • MCP servers or developer assistants using Envio’s APIs • Intelligent data pipeline generation or schema optimization 💡 Focus on AI as a helper or builder tool, not necessarily for analyzing blockchain data.

Qualifications

Clearly demonstrate the use of Envio’s technology (HyperIndex or HyperSync). Where possible, deploy to Envio’s hosted platform.

Best Use of HyperIndex

$1,500

E Satoshi Split$1,500

Prize details

Awarded to the team that best demonstrates the creative use of HyperIndex, Envio’s high-performance, multichain indexing framework. We will look for clear schema design, optimized event handling, and meaningful data querying.

Qualifications

Deployment to the hosted service (please reachout if you need production resources) Clear usage in your application

Best Use of HyperSync

$1,500

E evor.app$1,500

Prize details

Awarded to the project that best utilizes HyperSync, Envio’s ultra-fast blockchain data layer, for real-time data access or analytics. Examples may include on-chain dashboards, alerting systems, or AI-powered analytics built on HyperSync data streams.

Qualifications

Clear and meaningful usage of HyperSync Usage of one of the clients is highly recommended

Best Live Web3 dashboard

$500

E DeFi Cosmos$500

Prize details

Awarded to the team that builds the most impressive real-time Web3 dashboard powered by Envio’s data stack (HyperIndex and/or HyperSync) We’re looking for dashboards that don’t just visualize blockchain data, but bring it to life, whether that’s tracking protocol activity, monitoring on-chain metrics, surfacing wallet analytics, or presenting live ecosystem insights. Projects should demonstrate: • Real-time data powered by HyperSync or HyperIndex queries • Clear, intuitive visualizations of blockchain activity • Creative presentation or storytelling through data This prize celebrates teams who turn raw blockchain data into something that’s instantly understandable, dashboards that are as beautiful as they are informative.

Qualifications

Clearly demonstrate the use of Envio’s technology (HyperIndex or HyperSync). Where possible, deploy to Envio’s hosted platform.

P

Pyth

$5,000 prize pool · Ruby · 5 prizes awarded

Most Innovative use of Pyth pull oracle (Price Feeds)

$3,000

1st $1,500 · 2nd $1,000 · 3rd $500

P VigilBot1st place · $1,500
P SafeBet2nd place · $1,000
P Parmelia3rd place · $500

Prize details

Use Pyth Pull oracle to power up you dapp. The prize will go to the top three teams with best and most innovative use of Pyth Price feeds. Please read the qualification requirements carefully.

Qualifications

Qualification Requirements Your app should use Pyth price feeds via Pull method. The steps include. 1. Pull/Fetch the data from Hermes. (Check the links and Resources) 2. Update the data on chain using updatePriceFeeds method. 3. Consume the price. 4. You can run a price pusher too if you prefer traditional way of using oracles. (Optional) Please follow our comprehensive Pyth EVM guide to to integrate Pyth in less than 5 minutes.

Pyth Entropy Pool Prize

$2,000

$1,000 × 2 winners

P JuryDAO$1,000
P Whiphash$1,000

Prize details

Use Pyth Entropy to generate and consume random number on chains. Anyone can permissionless generate random number on-chain. This pool prize will be given to most Innovative apps to use Pyth Entropy.

Qualifications

Your app should consume random number generated by Pyth. Please follow along the guides and Tutorials to get started. NOTE: To get qualified for this track, raise a PR in https://github.com/pyth-network/pyth-examples. You just have to submit the working code along with a detailed README of your project.

A

Arcology

$5,000 prize pool · Ruby · 3 prizes awarded

The Best Parallel Contracts

$5,000

1st $2,500 · 2nd $1,500 · 3rd $1,000

A Paralend1st place · $2,500
A Goin' In!2nd place · $1,500
A Hollow3rd place · $1,000

Prize details

We’re looking for builders who can harness Arcology’s Parallel execution capabilities to create innovative, useful, and scalable smart contracts that push throughput to thousands of TPS and beyond.

Qualifications

Criteria: * Effective use of Arcology’s parallel execution features * Creativity and originality of the project * Real-world scalability and developer impact Requirements: * No UI/UX required — focus on smart contracts and execution logic * Must include scripts to generate transaction batches for benchmarking * Project must deploy and run on Arcology DevNet

LP

Lit Protocol

$5,000 prize pool · Ruby · 3 prizes awarded

Best DeFi automation Vincent Apps

$5,000

$1,667 × 3 winners

LP DeFlow$1,667
LP HLV Protocol$1,667
LP ViVault$1,667

Prize details

This track will award teams building novel DeFi/Prediction market automation applications using Vincent. Examples of apps we're looking for: Automated prop traders, Cross-chain Portfolio Rebalancers, Automated Yield Farming agents, Meta-vault aggregators, Cross-chain Airdrop farming agents, Agentic Polymarket bets, etc.

Qualifications

Mandatory Deliverables: 1. Fully functional Vincent App (published on our Registry) that uses at least one DeFi ability, excluding simple uses of ERC20 Transfers. See Quick Start: https://docs.heyvincent.ai/app/quickstart 2. Vincent App should accept user deposits and perform automated transactions on behalf of its users 3. Demo video with a walkthrough from accepting user deposits to putting their capital to use via the Ability Bonus Points: 1. Building new DeFi Abilities like Prediction Markets (Polymarket), Perps (GMX, Hyperliquid), Yield Aggregators (Yearn, Beefy Finance), Lending Protocols (Compound) 2. Demonstrating cross-chain capability: Airdrop framing on various Bitcoin L2 and automated conversion into stables 3. Using Debridge or Across for user deposits or cross-chain swaps for balancing portfolios, etc- need to create a Vincent Ability for it

Y

Yellow

$5,000 prize pool · Ruby · 3 prizes awarded

Yellow Prize Pool

$5,000

1st $2,500 · 2nd $1,500 · 3rd $1,000

Y StreamFlow1st place · $2,500
Y Yellow Craft2nd place · $1,500
Y touchgrass3rd place · $1,000

Prize details

Use the Yellow SDK and Nitrolite protocol to build a mini-app or feature that showcases instant, session-based transactions - all happening off-chain and settling on-chain when needed. 💥 How to participate - Integrate the Yellow SDK, connect to the Nitrolite test environment and create a wallet session. - Implement off-chain logic: simulate sending or spending assets instantly between users or in-app actions. - Show on-chain settlement: finalize balances through smart-contract calls when users end their session. 🛍️ Example App Ideas - In-Game Wallet: players deposit once and buy items or earn rewards instantly during gameplay. - Tipping System: users send 0.01 USDC per like, emoji, or message without gas or delay. - Pay-Per-Use App: charge users per API call, minute, or read action - settle once at the end of session. - Cross-App Wallet: one balance shared across multiple dApps (browser plugin, Telegram mini-app, etc.). 💎 Why Build on Yellow - Gas-free & instant: off-chain state channels = Web2 speed, Web3 security. - Session-based logic: define allowances for in-game or in-app use. - Multi-chain ready: works with all EVM chains; Solana support coming soon.

Qualifications

✅ Qualification Requirements - to qualify for the Yellow Network Prize, your project must: - Use the Yellow SDK / Nitrolite protocol in your submission. - Demonstrate off-chain transaction logic — e.g., instant payments, session-based spending, or settlement finalized via smart contracts. - Deploy or simulate a working prototype showing how Yellow improves transaction speed, UX, or efficiency. - Include a 2–3 minute demo video showing your integration and user flow. - Submit your project under the “Yellow Network” prize track on ETHGlobal and include a repo link. 🏆 Judging Criteria Projects will be evaluated based on: - Problem & Solution: clarity of the problem addressed and creativity of the solution. - Yellow SDK Integration: depth and impact of integration with Yellow technology. - Business Model: clarity and sustainability of the project’s value or revenue model. - Presentation: ability to communicate the idea clearly and persuasively. - Team Potential: team’s skill, passion, and commitment to continue post-hackathon.

H

Hardhat

$5,000 prize pool · Ruby · 2 prizes awarded

Best projects built using Hardhat 3

$5,000

1st $2,500 · 2nd $2,500

H Vigil31st place · $2,500
H ChronoVault2nd place · $2,500

Prize details

Build your project using Hardhat 3 as the main Solidity testing and network simulation tool

Qualifications

Usage of a Hardhat release 3.0.0*. Usage of Hardhat 2 releases won't qualify.

E

EVVM

$1,000 prize pool · Startup · 3 prizes awarded

Best New Relayer/Fisher Integration

$500

E PayVVM Gasless$PYUSD$500

Prize details

For the most creative project that captures or relays EVVM transactions or data from outside the chain. This category rewards hacks that leverage EVVM’s communication capability by using new "fishing spots" or relayer mechanisms outside the chain. Examples could include a Telegram or WhatsApp bot that lets users submit EVVM transactions via chat, an API service or browser extension that relays user actions to EVVM, a mempool scanner that picks up EVVM txs or anything useful you may create to surprise us. The goal is to showcase how EVVM transactions can be initiated from any medium (web apps, APIs, messaging platforms, IoT devices, etc.), demonstrating a truly seamless and accessible UX for blockchain interactions.

Qualifications

The winner must create an integration that retrieves data from off-chain sources and brings it into an EVVM virtual blockchain.

Best Implementation of Asynchronous Nonces

$250

E fisher$250

Prize details

EVVM supports both synchronous and asynchronous transaction nonces for submitting transactions, and this prize goes to the hack that makes the cleverest use of async nonces specifically. Asynchronous nonces allow users to issue multiple transactions without waiting for each to complete (out-of-order execution with protection against replay). This feature can enable parallel transaction processing, user-defined ordering of operations, or optimistic interactions that don’t strictly sequence transactions. Hacks in this category might include a demonstration of payment batching, a game or application logic that relies on out-of-order commits, or tooling that manages async vs. sync nonce flows for developers. We will favor a project that clearly showcases why asynchronous nonces are powerful. E.g. achieving something that would be cumbersome or impossible with traditional sequential nonces. Implementations should highlight EVVM’s flexibility in transaction scheduling and how that can benefit dApp design or performance.

Qualifications

The winner must create an integration that uses the async nonces on a realistic use case.

Most Innovative Use of EVVM’s Execution Function

$250

E Macaque$250

Prize details

For the project that most creatively integrates EVVM's unique transaction execution mechanism, the "executor". For example, a Fisher/Relayer who executes transactions on the EVVM or a new EVVM Service that executes on behalf of users under certain circumstances. EVVM can decentralize transaction execution to its network of participants (Fishers/Relayers), Services, or third parties. These should validate user-signed payloads (to prevent reverts) and call EVVM contracts to process them when appropriate. This category invites hackers to be creative with their use of this "executor" model. We are looking for innovative ideas that enhance the EVVM execution flow or extend it in a novel direction.

Qualifications

The winner must create an integration that uses the "executor" parameter on a realistic use case.

L

Lighthouse

$1,000 prize pool · Startup · 2 prizes awarded

Best Consumer DataCoin Created

$500

L Alpha Foundry$500

Prize details

1. Consumer data coin idea - Uber, Amazon data, or any other useful consumer data aggregated via zkTLS from protocols like reclaim protocol https://reclaimprotocol.org/ and rewarding data contributors with data coins

Qualifications

Must Launch a data coin on https://1MB.io/ Must store data via Lighthouse. Must integrate at least one live real-world dataset with proof/validation (e.g., zkTLS, API → DAO). Must deploy to Base, Polygon, ETH Sepolia or other supported networks. Must include a working demo (frontend) deployed on vercel, etc. Open-source code submitted via GitHub.

Best DataAgent Created

$500

L IntelliTrade$500

Prize details

Best DataAgent - Build interesting AI Agent use case where agents create synthetic data in field of Crypto Trading, Prediction markets, with potential use of data coins to reward agents for synthetic data creation, utilisation, monetisation or sharing with other agents.

Qualifications

Must Launch a data coin on https://1MB.io/ AI Agent should be at core of how data is created Must store data via Lighthouse. Must deploy to Base, Polygon, ETH Sepolia or other supported networks. Must include a working demo (frontend) deployed on vercel, etc. Open-source code submitted via GitHub.

E

ETHGlobal

10 prizes awarded

ETHGlobal

E ChronoVault🏆 ETHOnline 2025 Finalist
E Common-Lobbyist🏆 ETHOnline 2025 Finalist
E CronPay🏆 ETHOnline 2025 Finalist
E DeFlow🏆 ETHOnline 2025 Finalist
E EthVaultPQ🏆 ETHOnline 2025 Finalist
E OpenPayAI🏆 ETHOnline 2025 Finalist
E SafeSend🏆 ETHOnline 2025 Finalist
E Siphon Protocol🏆 ETHOnline 2025 Finalist
E Sippy🏆 ETHOnline 2025 Finalist
E WannaBet🏆 ETHOnline 2025 Finalist