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@arc

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

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  1. 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.
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  2. Arc@arc
    Arc
    RT @TollyLabs: A sneak peek at the Tolly Agent Exchange, being built on @arc. As the agent economy grows, discovering services is only part of the challenge. Users and other agents will need ways to compare offerings, identify reliable providers, and understand what's actually happening across the ecosystem. Tolly Agent Exchange is being developed as a comprehensive discovery and analytics platform, bringing x402 service comparisons, agent directories, job and task tracking, and performance analytics together in one place. At the heart of the Exchange, independent operators will be able to establish public business profiles showcasing their agents' capabilities, services, pricing, and verifiable activity history. Bringing greater transparency to agent services, reputation, and economic activity on Arc.
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  3. Arc@arc
    Arc has surpassed $1 billion in USDC circulating supply. A milestone for the network as the ecosystem continues to grow.
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  4. Arc@arc
    Built something in Arc Studio? Ship it on Arc Mainnet and apply for one of 8 microgrants, 500 USDC each. Experiments must be built in Arc Studio and move real USDC on Arc Mainnet. Submissions close Nov. 1. Details + apply:
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  5. Arc@arc
    SBI’s work with Circle started with bringing USDC to Japan. Erika Peterson and SBI discuss what comes next, from yen and dollar stablecoins to assets and settlement on Arc. Building toward financial infrastructure that supports activity across borders, around the clock.
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  6. Arc@arc
    Arc
    RT @TowerExchange: Week 4 of the Arc Accelerator Program was an insightful session on finding product-market fit led by @Jib0xD, founder of @ryskfinance. We explored how stablecoins and programmable money can solve real-world problems, the importance of understanding user pain points, and how to validate demand early. It was a great learning experience that reinforced the importance of building products around real user needs rather than assumptions.
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  7. Arc@arc
    Arc 🤝 @TollyLabs Tolly is an open marketplace for AI agent services, with Arc-first settlement. Live on Arc.
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  8. Arc@arc
    Aave V4 is live on Arc. Kolten of Aave breaks down the Core Hub, plus Main and Forex markets built for borrowing, lending, and liquidity on Arc.
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  9. Arc@arc
    Arc
    RT @Custarafinance: Custara is now live on the Odoo Apps store. Connect your odoo, and your posted vendor bills flows in. Every bill is checked against your policies, approved by your team, and paid in USDC on Arc. Your books stay in Odoo. Payments stay under control.
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  10. Arc@arc
    Arc
    RT @ZenGo: Zengo now supports Arc. On Arc, USDC pays its own network fees. Buy, swap, send and receive USDC without holding any other token just to cover gas. Welcome, @arc
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  11. Arc@arc
    Bridge USDC to Arc, then put it to work. Explore apps across lending, trading, liquidity, and onchain markets, including @aeroxyz, @aave, @Morpho, @Uniswap, and more. Bridge once and explore Arc:
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  12. Arc@arc
    Arc
    RT @jerallaire: Launch your idea.
    Arc @arc
    Arc 🤝 @Arguspad Every idea gets a seat. Live on Arc.
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  13. Arc@arc
    Arc
    RT @aomi_labs: Introducing Agentic Fuzzer for @arc. Ship protocols from Arc Studio and find exploits before attackers do. Let #Fable5 and #GPT6 Astra be the security auditor. Big projects pay for audits before launch. Now every builder can afford one too.
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  15. Arc@arc
    Arc
    RT @bleso_a: Last Friday, I ran an Arc Studio workshop for 100+ developers building with AI agents, and one thing became clear. Many developers are building products where blockchain could be genuinely useful, but the complexity of building onchain is still holding them back. A recurring theme during the session was that many developers see smart contract complexity as a barrier to building onchain. That’s what excites me about Arc Studio. Helping developers use blockchain to innovate, without needing to become smart contract experts first. I left the session inspired by what becomes possible when that barrier comes down. Let's keep building. Try it out at studio[dot]arc[io]
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  16. Arc@arc
    Build anything onchain with Arc Studio.
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  17. Arc@arc
    Arc
    RT @SafePal: Deposit and be eligible to win a USDC-edition wallet! Join the exclusive SafePal × @arc campaign and put your assets to work in curated @Morpho Vaults with a 2.0x Arc rewards boost 📅 26th Oct - 26th Nov 👉
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  18. Arc@arc
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  19. Arc@arc
    Arc
    RT @silencexlm: Real stories. Everyday @USDC. Join the new USDC group in @Arc House. Share your story and meet other fans. Kick off with us at the @Circle x @ChelseaFC NYC Watch Party, Oct 28. Join the group Today!
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  20. Arc@arc
    Arc
    RT @Xylonet_: PayX just got more versatile. EURC and cirBTC tipping are now live on XyloNet, expanding the assets you can send through X handles. More assets. More ways to pay. One seamless experience. Try PayX:
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  21. Arc@arc
    Arc
    RT @samconnerone: Announcing!!! New Group and Watch Party!! The @USDC Community is live on Arc House! It’s a new home for USDC fans to learn, ask questions, and connect with Team USDC and each other. Join the club, and use the forum, events, and member directory to get involved. And we’re kicking things off in person: ⚽ Circle x Chelsea NYC Watch Party 📅 Wednesday, October 28 | 3:45–6:00 PM EDT 📍 Brooklyn, NYC Watch Chelsea take on Liverpool with @circle and Team USDC. Expect good company, new connections, and merch giveaways. Bring someone new to USDC! Spots are limited, so RSVP now: Join the community:
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  22. Arc@arc
    Agents need one place to fund, monitor, and reconcile payments. @selat_ai uses Circle Gateway on Arc to help agents pay x402 and MPP merchants from one funded USDC balance across services, protocols, and chains. Arc serves as a home treasury for agentic economic activity.
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  23. Arc@arc
    Arc
    RT @SafePal: SafePal wallet suite natively integrates the 4 new @Morpho vaults on @Arc, curated by @gauntlet_xyz & @SteakhouseFi This brings the total of SafePal Earn vaults to 10 🙌 Stay tuned for more to come 👀
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  24. Arc@arc
    Arc
    RT @Quicknode: Indexing @USDC transfers on @arc starts with an eth_getLogs loop. Keeping that database fresh is a different job altogether This guide sets up the entire pipeline on Postgres using a single tool: Streams.
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  25. Arc@arc
    Arc
    RT @Aster_DEX: BTCUSDC, ETHUSDC, and SOLUSDC perpetuals are now live on Aster. Another step forward with @arc and @circle in expanding @USDC's role in onchain trading.
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  26. Arc@arc
    Arc
    RT @bleso_a: Many of you were curious to learn how Arc Studio plugs into popular coding agents. You can use Arc Studio as a subagent driven by your coding agent. There is a setup prompt that installs the CLI and Circle skills, and it handles contracts, reviews, and deploys without you having to leave your editor. Head to studio[.]arc[.]io to copy the prompt, and start building!
    Blessing Adesiji @bleso_a
    I was genuinely blown away by how great Arc Studio works with Claude Code. So I’m building a subscription app on Arc in Claude Code. It’s a native iOS app plus contracts that enforce price caps, opt-in after free trials, and instant cancellation onchain. Normally the contract deploy process would involve installing Foundry, creating and funding a deploy wallet, and running tests, before then deploying. All I did was use the Arc Studio CLI in Claude Code. A couple of minutes later, all my tests had passed and both contracts were live on Arc testnet. I then checked that the code onchain matched my source exactly. What I love the most about this experience is that Arc Studio plugs right into Claude Code as a sub agent. Claude Code builds my native iOS app and runs it in the simulator, Arc Studio handles my contracts, and I never had to leave my editor. You can also still use Arc Studio as a standalone app. Because I later opened my project on studio [dot] arc [dot] io and used the Contracts tab to review all the functions I deployed and check the contract state, then the Tracing panel to see what happens onchain when I interact with it. Again what an amazing time to be alive!
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  27. Arc@arc
    Trading and DeFi on Arc, now in Arc House. A new community group for traders, builders, and partners: → Get started with USDC through Arc Portal → Compare how DeFi apps work → Share what you’re building and get feedback
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  28. Arc@arc
    Arc
    RT @bleso_a: We are hosting a technical office hours session on building with Arc Studio and using it alongside coding tools like Claude Code, ChatGPT, Cursor. We’ll work through a real example: a USDC subscription app. You’ll learn how to turn a small prompt into an app, deploy a subscription contract to Arc Testnet with Arc Studio, and trace what happens onchain. Join us:
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  29. Arc@arc
    Hold and borrow USDC. Spend in local currencies. @RipioApp and @Morpho joined Matt Stafford to show how Arc supports payments, FX, and credit, from Brazil-to-Argentina transfers to borrowing local currency against USDC. See how it works in the full session.
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  31. Arc@arc
    Arc 🤝 @Aster_DEX Aster now supports USDC collateral on Arc, with USDC-margined perpetual futures on BTC, ETH, and SOL now live. For the first time, USDC is a trading and margin asset on Aster.
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  32. Arc@arc
    Arc
    RT @bleso_a: I was genuinely blown away by how great Arc Studio works with Claude Code. So I’m building a subscription app on Arc in Claude Code. It’s a native iOS app plus contracts that enforce price caps, opt-in after free trials, and instant cancellation onchain. Normally the contract deploy process would involve installing Foundry, creating and funding a deploy wallet, and running tests, before then deploying. All I did was use the Arc Studio CLI in Claude Code. A couple of minutes later, all my tests had passed and both contracts were live on Arc testnet. I then checked that the code onchain matched my source exactly. What I love the most about this experience is that Arc Studio plugs right into Claude Code as a sub agent. Claude Code builds my native iOS app and runs it in the simulator, Arc Studio handles my contracts, and I never had to leave my editor. You can also still use Arc Studio as a standalone app. Because I later opened my project on studio [dot] arc [dot] io and used the Contracts tab to review all the functions I deployed and check the contract state, then the Tracing panel to see what happens onchain when I interact with it. Again what an amazing time to be alive!
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  33. Arc@arc
    Arc 🤝 @extendedapp Extended is now fully migrated and live on Arc. USDC collateral. cirBTC as BTC collateral. Now live on Arc.
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  34. Arc@arc
    Arc 🤝 @moonpay MoonPay is live on Arc. MoonPay gives 30M+ users a familiar way to buy USDC with card, Apple Pay, Google Pay, bank transfer, and more, then land it on Arc. A recognized consumer funding path for wallets, apps, and builders growing on Arc.
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  35. Arc@arc
    Arc
    RT @samconnerone: Trading and DeFi on @arc now has an official community home!! Our new Arc House group brings traders, builders, partners, and trading platforms together to learn, compare notes, and share what they’re building. Start with USDC on Arc Portal and join in!!
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  36. Arc@arc
    Arc
    RT @jerallaire: Incredible to see how creative people are being with Arc Studio, vibe-coding app for Arc.
    Arc @arc
    Turn an idea into a working onchain app with Arc Studio. Describe what you want to build, then generate, review, test, and export the code with your own tools and infrastructure. → Smart contracts → Frontend UI → Tests → Docs → Deployment workflows
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  37. Arc@arc
    Arc
    RT @rf_extended: Extended is now Arc native. Excited for the next chapter, and looking forward to working with @jerallaire and the @circle team on a wide range of opportunities.
    Jeremy Allaire @jerallaire
    Extended becoming Arc native. Trade anything. This is a very exciting launch.
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  38. Arc@arc
    Turn an idea into a working onchain app with Arc Studio. Describe what you want to build, then generate, review, test, and export the code with your own tools and infrastructure. → Smart contracts → Frontend UI → Tests → Docs → Deployment workflows
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  39. Jeremy Allaire✓@jerallaire
    Extended becoming Arc native. Trade anything. This is a very exciting launch.
    Extended @extendedapp
    Extended moves to @arc on Thursday. Settlement migrates from Starknet to Arc on October 22 at 13:00 UTC. The migration is planned with no interruption to trading. Positions can still be liquidated during this time, so top up margin beforehand. Transfers between sub-accounts stay open. Most accounts need to do nothing. Your account, sub-accounts, positions, orders, history, points and keys carry across unchanged. USDC migrates as native USDC, ETH migrates 1:1 as wETH, and Vault (XVS) balances and withdrawal rights are preserved. If you hold more than $1 of USDT or wBTC in any sub-account, you must act by 12:00 UTC on October 21: - Authorise the conversion in-app. USDT converts to USDC and wBTC to cirBTC at 1:1 during the migration, with no swap fees. Extended credits a 0.50% premium. - Or withdraw both assets. If you miss the deadline, your whole account will be restricted for up to 30 minutes on October 21 while Extended cancels orders, closes positions in the affected sub-accounts at mark price with no fees, and returns your USDT and wBTC to your login wallet. Deposits and withdrawals will be paused for up to 2 hours during the migration. Full details can be found in the documentation:
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  41. Arc@arc
    Arc
    RT @yyctrader1: Mid-flight engine replacement complete✅ Shoutout to our chad engineers led by @dk_extended & @spooky_x10 for landing the plane with GitHub on fire, and to the @arc team for the runway. Zero trading downtime on a volatile day.
    Extended @extendedapp
    Extended now settles on @arc. The migration of $120 million in TVL is complete, with open positions and orders carried across. Trading continued throughout the process. What this means for our users: • Faster deposits and withdrawals, leveraging Arc’s sub-second finality. • Native USDC transfers through Circle’s CCTP. • cirBTC is now the BTC collateral asset. Deposits and withdrawals are open again.
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  42. Arc@arc
    Arc
    RT @UpscaleTrade: Hello, @Arc. Let’s trade 🤝 Upscale, the Web3 prop trading platform, now supports: 📲 Arc wallet sign-in 💳 Challenge payments in @Circle’s USDC on Arc 💵 USDC payouts To mark the launch, get 15% off any challenge paid for with USDC on Arc. A new product built specifically for the Arc ecosystem is on the way 👀
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  43. Arc@arc
    Arc
    RT @extendedapp: Extended now settles on @arc. The migration of $120 million in TVL is complete, with open positions and orders carried across. Trading continued throughout the process. What this means for our users: • Faster deposits and withdrawals, leveraging Arc’s sub-second finality. • Native USDC transfers through Circle’s CCTP. • cirBTC is now the BTC collateral asset. Deposits and withdrawals are open again.
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