Arc

The Economic OS for the internet. Now live on mainnet.

[Arc @arc]

Arc Mainnet is live.

Arc launches as the Economic OS for the internet: an open platform for global markets, real-time value movement, tokenized assets, and agentic economic activity.

Arc is more than a blockchain.

It launches as a full-stack financial platform with assets, applications, interoperability, developer infrastructure, and Circle platform services live from day one.

Arc delivers USDC as native gas, deterministic sub-second finality, EVM compatibility, and institutional validators.

It integrates with Arc Studio, App Kits, Arc Portal, Circle Agent Stack, CCTP, Gateway, CPN, and StableFX.

A complete economic platform at genesis.

Arc launches with infrastructure for:

→ Agentic economic workflows
→ Lending and borrowing
→ Trading and liquidity
→ Onchain FX
→ Payments and settlement
→ Tokenized assets
→ Exchanges, wallets, custody, compliance, data, and developer tooling

190+ institutional and ecosystem builders are building across Arc.

[0x @0xProject]

$100M+ aggregated on Arc in 2 days

0x has been there since the first block 🦾

[Arc @arc]

Agentic payments are live on Arc.

Our Facilitator Service gives x402 builders a hosted path to accept Circle-issued USDC, with onchain settlement supported on Arc, Base, and Polygon.

No relayer keys. No separate gas wallet. Just a cleaner path for agents to discover, pay, and keep moving.

https://t.co/NdKQbXB4yL

[Arc @arc]

Want cirBTC on Arc?

Head to Arc Portal. Two ways to get it:
→ Swap on Arc: trade USDC or other supported assets for cirBTC
→ Bridge from Ethereum: move cirBTC from Ethereum to Arc

Holding supported wrapped BTC assets on Ethereum?

Swap into cirBTC on Ethereum, then bridge cirBTC to Arc through Arc Portal.

Already holding cirBTC on Arc? Put it to work on lending markets.

Start here: https://t.co/YFSptWig2L

[Arc @arc]

Bridging into Arc is simple.

USDC Bridge gives you a direct, Circle-built way to move USDC onto Arc and other supported chains, so you can start trading on the apps and markets you came for.

Start with USDC. Bridge into what’s next.

https://t.co/An0NaCQolc

[Nansen @nansen_ai]

See what’s moving on @Arc. See who’s behind it. Trade it.

Research to execution, all in one view.

Trade on Nansen → https://t.co/nDAVZrwz6C

[Meridian @mrdn_finance]

Meridian is a decentralized inference router: one API to every major AI model, priced per request and settled by its own cross-chain x402 facilitator.

Now live on @arc

[Arc @arc]

Arc Portal is live.

The easiest place to start using Arc:
→ Create or fund wallets
→ Access earn opportunities with @Morpho
→ Swap assets including USDC for cirBTC
→ Manage agent wallets
→ Discover apps
→ View balances and activity

No tab-hopping across onramps, exchanges, wallets, and apps.

One entry point from first visit to first action.

https://t.co/Evo92X8pLd

[Extended @extendedapp]

Migration to Arc.

Extended is migrating to Arc as part of a strategic partnership between Circle and Extended focused on three core pillars:

1. Anchoring on-chain trading on Arc, with Circle as a key stakeholder in Extended’s ecosystem
2. Tokenising RWAs while bringing broader market coverage and deeper liquidity across both spot and perpetual markets
3. Distributing trading products within and beyond crypto, directly and through Tier 1 institutional partnerships

Beyond the commercial rationale, Arc is also a strong technical fit for Extended:
• Deterministic sub-second finality
• Predictable, dollar-based gas fees
• EVM compatibility

The migration is being designed to minimize disruption for users and ensure uninterrupted trading.

More details on the partnership, migration timeline, and mechanics will be shared separately. Users will be notified of any action required on their part ahead of migration.

[Arc @arc]

Learn more: https://t.co/6KTF0fyYxU

[Arc @arc]

What will you build on Arc?

We’re giving up to $1M to eligible teams building exceptional projects on Arc, from payments and FX to lending, asset tokenization, and agentic workflows.

Arc Mainnet is live. The platform is ready. Now it’s time for builders.

Explore the funding below. https://t.co/vlqw12vugy

[Allnodes @Allnodes]

Congrats to @arc on the mainnet launch! Arc is now on Allnodes with full & archive nodes, plus FREE RPC endpoints & snapshots on PublicNode. The Economic OS for the internet is open to everyone here https://t.co/5EU9vyJArH

[sukanto @sukanto018]

Just tried Arc Studio: describe what you want, and it turns the idea into a working onchain app.

I built a USDC splitting app in just 5 minutes, from a simple prompt to a working app with UI and onchain functionality.

Idea → Build → Test, all in minutes.

Really interesting experience for anyone building onchain.

@arc

[Arc @arc]

Arc Mainnet is Live Drone Show https://t.co/XiGljZZjTL

[Arc @arc]

@Velafi_global 🤝

[VelaFi_global @Velafi_global]

@Velafi_global Payments is live on @arc from day one.

What it unlocks:
→ Native USDC access through VelaFi's global payment infrastructure
→ More efficient settlement across LATAM, Asia, and global markets
→ Arc connects more businesses and financial institutions to USDC-based payment infrastructure through VelaFi. Faster, lower costs, secure and compliant.

Read our full announcement: https://t.co/mQfX06hpN1

Learn more about Arc: https://t.co/fjp67SL2Uz

[Arc @arc]

Arc Mainnet is live.

Rewatch the launch event and see what’s now building on Arc.

[Sam | Circle and Arc Dev Community @samconnerone]

Yesterday’s @arc developer pre-show had to be one of the most satisfying moments I’ve had here at @circle.

Since launching in late March, our community has grown to more than 70K members in Arc House across 10+ countries, with our Architects program growing to more than 10,000 members.

Yesterday, on launch day, that community — and the work behind it — was on full display.

We featured:
• 15 Circlers
• 15 Architects
• 11 Founders

But honestly, it's not about the numbers

What made this moment special was seeing the people we’ve been building alongside become part of the launch itself with developers, founders, Architects, community leaders, and teammates all sharing the same stage.

That’s the kind of community we set out to build ♥🙏🏾

Proud of what this team and community have built together.

And we’re just getting started. 💙

[The Rollup @therollupco]

Every blockchain before @arc was the BlackBerry, and @circle's CEO @jerallaire is betting Arc is the iPhone moment.

"There were 15 years of people building mobile, massive companies, Microsoft, Nokia, Samsung, the Palm Pilot, the BlackBerry. Everyone thought they had mobile."

"Everyone said, I've got apps, I can do this stuff. But it hadn't really actualized."

"Then came the breakthrough of Android and iOS. These new operating systems created the surface area, the user experience, the developer experience."

"Enough things converged at the right time. That's how I think about what we're doing with Arc."

"We had the benefit of hindsight. USDC is the most cross-platform thing out there. If you issue an asset on Arc, you can ride on CCTP and distribute it to over 20 networks."

[The Rollup @therollupco]

Circle's CEO says Arc isn't a payments chain but an operating system for running an entire economy, contracts, governance and all.