{Arc L1 blockchain}

Build real-world finance onchain

Whether you're launching a financial application, integrating stablecoin flows, or experimenting with new, AI-powered economic models, Arc gives you the tools to build what isn’t possible anywhere else.

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Purpose-built to support real-world financial flows

Arc is engineered from the ground up to support enterprise-grade, stablecoin-native value movement with predictable fees, deterministic settlement, compliance-ready privacy, and direct access to global liquidity infrastructure.

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Predictable, dollar-based transaction costs

Arc fees are low, predictable, and denominated in USDC — so you’re not exposed to volatile gas tokens or surprise cost spikes. Whether you’re sending $1 or $1B, fees stay predictable and easy to budget.

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Privacy when you need it, transparency when you don’t

Arc includes opt-in privacy controls that let businesses selectively shield sensitive transaction details while preserving auditability, designed to help meet regulatory and reporting obligations.

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Settlement that’s final the moment it happens

Arc transactions reach deterministic finality in under a second, eliminating challenge risk, reducing counterparty exposure, and supporting real-time financial workflows.

Native Circle-stack integration

Arc is integrated directly into Circle’s full-stack platform — including USDC, CCTP, Gateway, institutional on/offramps, and a full suite of developer services — reducing integration friction and accelerating time to market.

Your multichain liquidity and interoperability hub

Arc is designed to aggregate stablecoin and tokenized asset liquidity and, with CCTP and Gateway, make it programmatically accessible for capital formation and value exchange across the multichain ecosystem. Teams can anchor core financial workflows — settlement, collateral, treasury, issuance, and more — on Arc while interoperating seamlessly across ecosystems like Ethereum and Solana.

Arc is the global settlement hub that connects ecosystems and routes liquidity across chains.

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Live on public testnet

Arc is currently in public testnet, with strong developer adoption and sustained network activity1 ahead of mainnet launch.

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Real economic activity unleashed on Arc

Arc is purpose-built for the next generation of financial and commercial applications with the performance, predictability, and institutional readiness today’s markets demand.

Agentic economic activity

Enable autonomous AI agents to coordinate, contract, and settle value in real time with programmable, stablecoin-native infrastructure.

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Stablecoin FX

Build real-time, onchain stablecoin FX products with transparent pricing, instant settlement, and predictable fees.

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Peer-to-peer payments

Launch instant, low-cost, peer-to-peer payments with stablecoin-native transfers and deterministic settlement.

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Treasury management

Deploy stablecoin-powered treasury products faster with embedded wallets, transfers, compliance tooling, and programmable liquidity management.

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Prediction markets

Create capital-efficient prediction markets for economic and financial outcomes that aggregate information into real-time price signals with programmable logic and instant, deterministic stablecoin settlement.

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Lending and borrowing

Build lending and borrowing products with instant stablecoin settlement, automated collateral logic, and composable onchain risk management.

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Asset tokenization

Issue, manage, and trade tokenized real-world assets with instant settlement and optional, built-in privacy tooling for compliance readiness.

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Onchain FX

Power 24/7 onchain FX between stablecoins with instant PvP settlement, programmable execution, and low, predictable fees using Circle StableFX.

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Cross-border payments and payouts

Power global payments and payouts with instant settlement and predictable, dollar-based fees.

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Treasury management

Modernize treasury operations with real-time stablecoin settlement, automated liquidity routing, programmable disbursements, and full visibility into onchain cash positions.

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Capital markets settlement and collateral

Arc’s sub-second finality and stablecoin-backed collateral support high-frequency trading, real-time risk, and efficient capital usage.

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Onchain credit markets

Design onchain credit markets powered by stablecoins, identity, and reputation — with instant settlement and predictable costs.

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The Economic OS for the internet

Arc is built for a future where money, markets, and software operate as one programmable system across the internet-native economy.

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Testimonials

ARC.RUNTIME | REf-01

We’re excited to be part of an initiative that tests how programmable settlement and interoperable FX workflows can enhance regulated markets.

Mathew McDermott
Role: Global Head of Digital Assets
ORG: Goldman Sachs
ARC.RUNTIME | REf-02

Deepening our longstanding work with Circle as an early design partner, Mastercard is exploring how we can help shape Arc’s foundation to enable secure, simple payment experiences across both fiat and stablecoin rails.

Raj Dhamodharan
Role: Executive Vice President, Blockchain & Digital Assets
ORG: Mastercard
ARC.RUNTIME | REf-03

Arc’s design — integrating stablecoin-based gas fees, deterministic finality, and programmable interoperability — offers a strong environment to explore how trusted payments networks can connect to and help scale emerging onchain infrastructure.

Cuy Sheffield
Role: Head of Crypto
ORG: Visa
ARC.RUNTIME | REf-01

We’re excited to be part of an initiative that tests how programmable settlement and interoperable FX workflows can enhance regulated markets.

Mathew McDermott
Role: Global Head of Digital Assets
ORG: Goldman Sachs
ARC.RUNTIME | REf-02

Deepening our longstanding work with Circle as an early design partner, Mastercard is exploring how we can help shape Arc’s foundation to enable secure, simple payment experiences across both fiat and stablecoin rails.

Raj Dhamodharan
Role: Executive Vice President, Blockchain & Digital Assets
ORG: Mastercard
ARC.RUNTIME | REf-03

Arc’s design — integrating stablecoin-based gas fees, deterministic finality, and programmable interoperability — offers a strong environment to explore how trusted payments networks can connect to and help scale emerging onchain infrastructure.

Cuy Sheffield
Role: Head of Crypto
ORG: Visa

Developer resources

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Dive in with hands-on guides that help you quickly try Arc for real-world use cases using Circle developer tools.

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Join the global network of Architects reimagining how value moves on Arc.

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Explore all the resources you need to test real workloads and integrations before Arc Mainnet deployment.

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Try our sample apps on GitHub that demonstrate the capabilities of CCTP, how to integrate USDC payments on Arc, and more.

FAQ

What is Arc?
What differentiates Arc from other Layer-1 (L1) blockchains?
What use cases does Arc support?
How can I get started building on Arc?
  1. Stats are taken from the Arc testnet explorer website and represent data collected from 2/25/26–3/3/26.