Arc is the purpose-built L1 blockchain from Circle, EVM-compatible, and serves as the Economic OS for the internet — powering the programmable trust layer and transaction engine where capital, humans, and machines coordinate to drive real economic growth. Arc enables builders and issuers worldwide to power the next era of onchain lending, capital markets, FX, and payments - igniting liquidity across currencies and asset classes.
Build and deploy smart contracts that demonstrate advanced programmable logic using USDC or EURC — such as conditional flows, onchain automation, or multi-step settlement mechanisms.
What we’re looking for:
Submissions will be evaluated based on the following parameters. Please be clear what bounty you are submitting for as a part of your submission!
Build chain abstracted USDC apps that treat multiple blockchains as one liquidity surface, using Arc to move USDC wherever it’s needed. Projects should demonstrate how capital can be sourced, routed, and settled across chains through a single application without fragmenting user experience.
Submissions will be evaluated based on the following parameters. Please be clear what bounty you are submitting for as a part of your submission!
Functional MVP and diagram:
Build applications that enable autonomous AI agents to transact with each other using nanopayments on Arc. Projects should demonstrate how agents can make gas-free micropayments for API calls, data access, compute resources, or services without human intervention. Focus on agent-to-agent commerce, automated payment flows, and scalable transaction systems where traditional payment rails are too expensive or slow.
Examples:
Submissions will be evaluated based on the following parameters. Please be clear what bounty you are submitting for as a part of your submission!
Functional MVP and diagram:
Are you a founder or have interesting MVPs from previous hackathons? Take a project you already own and add a working Arc integration. Open source repos and live products both qualify.
Functional MVP and diagram:
Projects must demonstrate a working frontend and backend plus an architecture diagram. Video demonstration + presentation: Succinctly outlining the project's core functions and its effective use of Circle's Developer tools/tech is required, supported by detailed documentation. Link to GitHub/Replit repo
Build prediction market applications on Arc that move beyond speculation and deliver real-world utility — such as forecasting, hedging, and decision-making. Projects should leverage Arc’s stablecoin-native infrastructure (USDC/EURC gas, native FX, deterministic finality, and compliance-ready architecture) to create prediction markets that are easier to use, economically predictable, and credible enough for consumer, institutional, and enterprise use cases. Please see resources section for recommended products to use
Examples:
Submissions will be evaluated based on the following parameters. Please be clear what bounty you are submitting for as a part of your submission!
Functional MVP and diagram:
Machines are starting to pay each other (for API calls, inference, data, and compute) in amounts far too small for traditional rails. But today those payment streams are fully transparent: anyone can watch an agent's spend, infer its strategy, and map its counterparties.
Build a system where autonomous agents (or users) make high-frequency, low-value payments that are also private. How the pieces fit together:
Use all three: the project must integrate Dynamic, Arc (testnet), and Unlink as core components
Dynamic: use Dynamic wallets to onboard the user/agent and sign payment authorizations. Embedded wallets for user-driven flows; server wallets (with delegated access) are the fit for autonomous agents signing
Arc: settle nanopayments on Arc testnet using USDC via Circle Gateway (x402 / batched settlement). Demonstrate real gas-free micro-settlement, not a single large transfer.
Unlink: integrate the Unlink SDK (@unlink-xyz/sdk) so at least one payment is genuinely private; the demo must show a real private transfer or withdrawal.
Your app must be deployed and usable by judges
Working demo (live or short video).
Public GitHub repo + README explaining how each of the three integrations is used and what specifically is private.
App Kits provide the infrastructure and revenue logic required for global, financial apps. Bridge, swap, send, and ...
04:00 PM EDT — Friday, Jun 12, 2026 in Floor 3 | Workshop Room 2
ETHGlobal New York 2026