Provided by Amazon Web Services (AWS)Fetch.ai together with SingularityNET in the ASI Alliance is building an open, modular marketplace for autonomous AI agents. Developers can create agents that discover each other, connect to services and APIs, reason over knowledge, and act across chains, without needing niche domain expertise. The stack is UI-agnostic and designed for search, discovery, and dynamic connectivity.
At its core, uAgents power autonomous behavior; Agentverse provides listing, hosting, and orchestration; and the Fetch Network secures identities, messaging, and execution. ASI:One offers a Web3-native LLM and Chat Protocol so people can talk to agents directly. SingularityNET’s MeTTa brings structured knowledge and reasoning giving agents real-world signals with provenance and privacy.
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.
Join us for an introductory, hands-on session on building agents with the Fetch.ai tech stac and making them intell...
03:00 PM EDT — Tuesday, Oct 14, 2025
Avail is designed for a new era where users, dApps, and tokens can navigate the onchain economy at an unprecedented scale. With Avail, both users and developers gain access to the entire onchain economy from anywhere.
Avail frees developers from the constraints of specific tools, programming languages, or frameworks, allowing them to use the stack that best fits their project. Simply plug-in Avail to reach any asset on any chain, at any scale.
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:
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:
Qualification requirements:
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.
Hackers need to:
Access liquidity from across 12 chains in a few seconds with Avail.
09:30 AM EDT — Wednesday, Oct 15, 2025
Blockscout is an open-source explorer serving thousands of blockchains. Access a wide spectrum of onchain data and relevant metadata for your application and/or launch your own explorer in minutes to support any chain (yours included!). We provide an SDK, API, MCP for AI integrations, and the Autoscout self-launch platform for developers who are working with onchain data.
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:
Create an account: To get started, go to https://deploy.blockscout.com/, create an account, and login to get started.
Request credits in the EthGlobal Discord Channel. Share your email to request and we will top off your account for the hackathon.
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.
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.
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.
To win this prize you need to use the new Blockscout SDK in a relevant way inside your project.
Use Blockscout's MCP to:
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:
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.
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.
PayPal is known for being at the forefront of digital commerce and now it’s opening the door for millions of merchants and customers around the world to pay (and be paid) their own way — whether in fiat, cryptocurrency, or even the PayPal stablecoin, PYUSD.
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?
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 AND REQUIREMENTS:
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?
Introduction to PYUSD and resources on building with PYUSD
04:00 PM EDT — Tuesday, Oct 14, 2025
Hedera stands apart as a leading EVM blockchain through its distinctive developer experience, enabling developers of all backgrounds to leverage familiar tools like Solidity or its JavaScript SDK* to build breakthrough applications.
Linux Foundation Decentralized Trust manages Hedera’s open-source codebase (as Project Hiero) including the hashgraph consensus algorithm which enables 10,000+ TPS, 3s finality, low fees priced in USD, and the highest grade (aBFT) of security. Meanwhile, the Hedera public network is governed by a diverse council of the world’s leading institutions to ensure transparent and fair decision-making.
By empowering the development of applications that solve real-world challenges across DeFi, tokenization, AI, digital identity, and more, Hedera is the trust layer that underpins a decentralized future.
For more information, visit www.hedera.com, or follow us on X at @hedera, Telegram at t.me/hederahashgraph, or Discord at www.hedera.com/discord. The Hedera whitepaper can be found at www.hedera.com/papers.
*Hedera also hasSDKs for Java, Python, Rust, Go, and Swift!
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.
Multi‑agent communication — implement message exchange using the A2A standard.
Agent Kit integration — build your agents with the Hedera Agent Kit and its adaptors.
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.
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.
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.
Integrate Vincent — register your agent/app, define tools and capabilities, and use the Vincent SDK.
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.
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.
Follow the plugin architecture — your plugin must adhere to the Hedera Agent Kit’s plugin interface and be installable via npm or similar.
Provide clear documentation — include setup instructions, available tools and example usage. Explain how the plugin interacts with Hedera and any external services.
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.
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.
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.
Deploy and verify a smart contract on Hedera — use Hedera mainnet, testnet or previewnet; verify contracts on Hashscan.
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.
Use Hedera services where relevant — consider HTS System Contracts or the Token Service for hybrid native/EVM functionality.
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.
This workshop is a fast-track overview of building on Hedera. You will see examples of how to deploy Solidity contr...
09:00 AM EDT — Tuesday, Oct 14, 2025
Envio is high-performance data tooling for blockchains. HyperIndex is an ultra-fast, multi-chain indexer with one-click hosted deployments. HyperSync is a raw blockchain data API that replaces RPC endpoints, delivering up to 2000x faster reads. Run pnpx envio init to scaffold an indexer in seconds and build real-time dapps or data-heavy workflows in minutes.
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.
Deployment to the hosted service (please reachout if you need production resources) Clear usage in your application
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.
Clear and meaningful usage of HyperSync Usage of one of the clients is highly recommended
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.
Clearly demonstrate the use of Envio’s technology (HyperIndex or HyperSync). Where possible, deploy to Envio’s hosted platform.
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.
Clearly demonstrate the use of Envio’s technology (HyperIndex or HyperSync). Where possible, deploy to Envio’s hosted platform.
Live coding, zero fluff. We’ll scaffold an indexer with pnpx envio init, deploy HyperIndex, and wire up a front end...
11:30 AM EDT — Monday, Oct 13, 2025
Powered by Lit Protocol's programmable signing is Vincent, a scoped delegation platform enabling automated transactions cross-chain: EVM, Solana and native Bitcoin that is the focus for this prize. Teams use it to automate user transactions where the user still retains full control of the scope of the delegation to an app. This enables trustless automations: Cross-chain Portfolio Rebalancers, Automated Yield Farming agents, Meta-vault aggregators, Non-custodial Asset managements, Cross-chain Airdrop farming agents.
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.
Mandatory Deliverables:
Bonus Points:
Come learn how users can delegate policy governed signing authority to your apps without handing over their private...
02:00 PM EDT — Wednesday, Oct 15, 2025
Pyth Network provides real-time financial market data to smart contracts across over 100 blockchains. Developers can access high-frequency price feeds for crypto, equities, FX, and commodities, as well as request secure, verifiable random numbers using Pyth Entropy. At the event, hackers can leverage Pyth’s data feeds to power DeFi protocols, on-chain games, prediction markets, or any app that depends on accurate external data.
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.
Qualification Requirements Your app should use Pyth price feeds via Pull method. The steps include.
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.
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.
Want real-time, low-latency data for your dApp? Learn how to power your DeFi, gaming, or prediction market project ...
10:30 AM EDT — Monday, Oct 13, 2025
Hardhat is a development environment to compile, deploy, test, and debug your Ethereum software. Hardhat 3 introduces Solidity tests, performance critical components in Rust, multichain support across the board, OP Stack simulation, revamped build system, a modernized CLI and plugin system, and a lot more.
Build your project using Hardhat 3 as the main Solidity testing and network simulation tool
Usage of a Hardhat release 3.0.0*. Usage of Hardhat 2 releases won't qualify.
Arcology is a high-performance blockchain with full EVM equivalency, designed for parallel execution to process multiple transactions simultaneously and power the next generation of scalable, high throughput decentralized applications.
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.
Criteria:
Requirements:
Yellow Network lets you deposit crypto once and make lightning-fast transactions without waiting for blockchain confirmations or paying gas each time. It combines the best of both worlds — the speed of off-chain systems and the security of smart contracts.
💡 How it works: When you send funds or interact with an app, your transfers happen off-chain through a secure network of Yellow nodes that keep balances in sync. It feels instant, like using a regular web app. Smart contracts on each blockchain act as safes: they hold your deposit, verify everything, and make sure your money is protected. If you ever stop using the app or want to withdraw, your final balance is settled on-chain. Your session is protected by unique digital keys that only you control. No one can change your balance or take your funds. Even if something goes wrong, your assets automatically return to you.
🚀 Key features:
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
🛍️ Example App Ideas
💎 Why Build on Yellow
✅ Qualification Requirements - to qualify for the Yellow Network Prize, your project must:
🏆 Judging Criteria Projects will be evaluated based on:
Hackers can use Lighthouse's latest product https://1MB.io/ to create, trade and monetise data using data coins. We are looking for use cases where you bring in consumer or synthetic data to create and rewards contributors or agents with data coins.
Consumer data coin idea - Uber, Amazon data or any other aggregated via zkTLS from protocols like reclaim protocol https://reclaimprotocol.org/ and rewarding data contributors with data coins
Synthetic data - Synthetic data generated by agents in field of Crypto Trading, Prediction markets, with potential use of data coins to reward agentic usage
Lighthouse storage and encryption to be used to store and encrypt data
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 - 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.
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.
Learn to create DataCoins for consumer and agentic use cases using https://1mb.io/ and https://www.lighthouse.stora...
10:30 AM EDT — Thursday, Oct 16, 2025
EVVM let's anyone create Virtual Blockchains on top of any chain just deploying smart contracts. For this hackathon we use Ethereum Sepolia.
EVVM is a new way to create virtual blockchains on top of existing networks like Ethereum, Arbitrum, Hedera and others. It lets you spin up your own blockchain environment by simply deploying smart contracts instead of running a whole new network. You can have the benefits of a custom blockchain without managing physical infrastructure (no validators or dedicated nodes needed).
Each EVVM instance runs as a set of Solidity contracts on a host chain and emulates core components of a blockchain, inheriting the security of the underlying chain. A “blockchain within a blockchain”, similar to a virtual machine in computing, but for blockchains.
EVVM is implemented entirely in Solidity, easy for developers to deploy, customize, and upgrade. There’s no need to set up new nodes or consensus mechanisms. This infra‐less deployment approach lowers the barrier to experimenting with new blockchain ideas or tailored networks for specific use cases.
Multiple EVVM instances can run in parallel on the same host chain, achieving vertical scalability by stacking virtual chains on one physical network.
Developers can also use EVVM as a sandbox to experiment with new features or Ethereum improvements (like testing new opcodes or economic models) in an isolated environment, without affecting the main chain.
Sepolia EVVM Contract: 0xF817e9ad82B4a19F00dA7A248D9e556Ba96e6366
Sepolia MATE Staking Contract: 0x8eB2525239781e06dBDbd95d83c957C431CF2321
Sepolia NameService Contract: 0x8038e87dc67D87b31d890FD01E855a8517ebfD24
Faucet for Sepolia MATE tokens: https://evvm.dev
Get Sepolia ETH asking on Discord: https://discord.com/channels/554623348622098432/1423452960985321532
Or Telegram Devs Group https://t.me/EVVMorg
Do you want to combine us with other sponsors? testnet PayPal USD (PYUSD) is on Sepolia as well!!!
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.
The winner must create an integration that retrieves data from off-chain sources and brings it into an EVVM virtual blockchain.
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.
The winner must create an integration that uses the "executor" parameter on a realistic use case.
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.
The winner must create an integration that uses the async nonces on a realistic use case.
ETHOnline 2025
