@arc mainnet goes live on September 16 projects like @fomo, @Uniswap, @opensea, @Alchemy will have support from day 1 I am sharing a complete guide on what you need to know about the chain & how to be ready for the launch insane opportunity tbh https://t.co/q93Yyxy0Yu

9.16.26 @0xrachelita x @samconnerone built different.... @arc

14 days til @arc mainnet https://t.co/R7pqPV29Jf

My conversation with Nikhil Chandhok (@chandhok), CPTO at @circle. On Arc - the blockchain Circle is building for stablecoin finance - along with @USDC, liquidity, DeFi, and the rise of the agentic economy. This is part two of the series. 0:00 Arc as a liquidity hub - one-click deployment of USDC across any chain 4:44 Why liquidity moves to where it’s most useful 6:22 Settlement finality, USDC as gas, predictable fees, no platform lock-in 10:07 Tokenized assets + DeFi day one (Morpho, Uniswap, CI BTC) 11:35 Mainnet this year + rich partner roster live from launch 13:12 From dial-up internet to agents: the next architecture of the web 17:38 Agents with wallets, nested tasks, and USDC as the lingua franca 20:17 Billions of economic actors, ratings, identity, and instantaneous money 21:16 Agent Stack is only months old - executing the full roadmap @chandhok on why Arc is the place enterprises and builders want to hold and issue assets: “We’re going to be a liquidity hub. You don’t feel like your assets are locked into Arc. You have instant liquidity… You’re not locking into us. Your assets can go wherever they have the most use.” And on the agentic future: “This is a whole new internet architecture… the native form of money is now going to be instantaneous money… USDC in my mind.” The learnings from building the USDC network, applied to Arc and the agent economy. Enjoy.

My conversation with Nikhil Chandhok (@chandhok), CPTO at @circle. On Arc - the blockchain Circle is building for stablecoin finance - along with @USDC, liquidity, DeFi, and the rise of the agentic economy. This is part two of the series. 0:00 Arc as a liquidity hub - one-click deployment of USDC across any chain 4:44 Why liquidity moves to where it’s most useful 6:22 Settlement finality, USDC as gas, predictable fees, no platform lock-in 10:07 Tokenized assets + DeFi day one (Morpho, Uniswap, CI BTC) 11:35 Mainnet this year + rich partner roster live from launch 13:12 From dial-up internet to agents: the next architecture of the web 17:38 Agents with wallets, nested tasks, and USDC as the lingua franca 20:17 Billions of economic actors, ratings, identity, and instantaneous money 21:16 Agent Stack is only months old - executing the full roadmap @chandhok on why Arc is the place enterprises and builders want to hold and issue assets: “We’re going to be a liquidity hub. You don’t feel like your assets are locked into Arc. You have instant liquidity… You’re not locking into us. Your assets can go wherever they have the most use.” And on the agentic future: “This is a whole new internet architecture… the native form of money is now going to be instantaneous money… USDC in my mind.” The learnings from building the USDC network, applied to Arc and the agent economy. Enjoy.

Xylonet 🤝 @arc Swaps. Bridges. Payments. Liquidity. Mainnet changes everything. September 16th

Circle's @Arc hits mainnet Sept 16. Fireblocks is a founding validator. Securing an open network built for institutional settlement, real-time money movement, and onchain markets. 🔗: https://t.co/TilUfM2zsr https://t.co/X0S9magG67

Aerodrome will be there on Day One, standing up critical liquidity infrastructure.

We are pleased to join the Arc founding validator cohort and look forward to continuing to play a role in advancing digital assets adoption across TradFi and digital markets.

From testnet toward mainnet. 🌐 Proud to stand with @circle as a day-one liquidity provider and capital allocator on @arc. Live September 16, ready to power liquid markets and efficient trading across the ecosystem from the start. https://t.co/GQQmgurHQj

Arc Mainnet launches September 16. Arc is an open blockchain network being built for the world’s financial markets, real-time money movement, and agentic economic activity. Arc’s founding validator cohort includes @BlackRock, @The_DTCC, @galaxyhq, @GlobalPayInc, @Mastercard, @MoneyGram, @ICE_Markets, SBI, @StanChart, Sumitomo Corporation, and @Visa. This is a different model for onchain infrastructure: a network secured by the institutions building on it. Arc is already gaining traction across major institutions. @BlackRock, @BNYglobal, @The_DTCC, and @StanChart are each exploring integrations spanning tokenized asset settlement, custody, stablecoin access, FX, and repo infrastructure. Arc is also expected to launch with a broad ecosystem across liquidity, payments, access, and infrastructure with more to come. Liquidity / DeFi: @aave, @AerodromeFi, @FalconXGlobal, @galaxyhq, @GSR_io, @keyrock, @Morpho, @nonco_otc, @Uniswap, @OfficialXFX Payments: @raincards, @ThunesPayments, @wirexapp Major Exchanges and Wallet Providers: @BinanceWallet, @chainlink, @FireblocksHQ, @krakenfx, @Ledger, @MetaMask, @Official_Upbit, @Uniswap Participants building on Arc experience an open platform powering the world's financial markets, real-time money movement, and agentic economic activity. 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. Arc Mainnet launches September 16. https://t.co/lUb8kJRp2o

Arc Mainnet launches September 16. Arc is an open blockchain network being built for the world’s financial markets, real-time money movement, and agentic economic activity. Arc’s founding validator cohort includes @BlackRock, @The_DTCC, @galaxyhq, @GlobalPayInc, @Mastercard, @MoneyGram, @ICE_Markets, SBI, @StanChart, Sumitomo Corporation, and @Visa. This is a different model for onchain infrastructure: a network secured by the institutions building on it. Arc is already gaining traction across major institutions. @BlackRock, @BNYglobal, @The_DTCC, and @StanChart are each exploring integrations spanning tokenized asset settlement, custody, stablecoin access, FX, and repo infrastructure. Arc is also expected to launch with a broad ecosystem across liquidity, payments, access, and infrastructure with more to come. Liquidity / DeFi: @aave, @AerodromeFi, @FalconXGlobal, @galaxyhq, @GSR_io, @keyrock, @Morpho, @nonco_otc, @Uniswap, @OfficialXFX Payments: @raincards, @ThunesPayments, @wirexapp Major Exchanges and Wallet Providers: @BinanceWallet, @chainlink, @FireblocksHQ, @krakenfx, @Ledger, @MetaMask, @Official_Upbit, @Uniswap Participants building on Arc experience an open platform powering the world's financial markets, real-time money movement, and agentic economic activity. 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. Arc Mainnet launches September 16. https://t.co/lUb8kJRp2o

Arc mainnet marks the start of a new infrastructure era. Wirex’s payment rails are coming to @arc, bringing cards, stablecoin settlement and real-world payments to the network from day one. 🤝

@arc The open credit network on Arc, coming soon.

MoneyGram🤝 @arc We’re proud to be part of Arc’s founding validator cohort and contribute to a new model for onchain infrastructure.

Arc Mainnet. September 16. https://t.co/4vSIbo6xQS

The @arc community meetup in Buenos Aires looks incredible!! 🇦🇷 Huge shout-out to @criptopoeta and the entire @BuFi_Global family! https://t.co/m4139Ojzdu

Currently in Seoul, Korea. Would love to meet builders building in the agentic economy or on Arc!

👀 Circle is in Seoul .. again! Excited to share more about Arc and Circle Agent Stack to senior executives in Korea https://t.co/QjI6vcNtVN

I love every part showing up for the Arc community! Captured having great conversations with builders. It is personal. Time to build on Arc!

Your USDC is earning yesterday's rate. Introducing Quicknode Earn: a non-custodial yield optimizer that moves your USDC into the top-paying Morpho vaults across 7 chains, automatically. Your keys, always. 🧵 https://t.co/NYTsKImsGD

I really want to give a huge shout-out to our growing Vietnam @arc community! I see you and appreciate all the work you're doing! 🫶🏾 built different. https://t.co/ouYv2Ggqj8

🇻🇳Chào anh em chúc anh em tuần mới vui vẻ và tràn đầy năng lượng Video recap lại @arc Meetup đầu tiên tại Việt Nam 🇻🇳 > Rất vui khi được gặp mặt, chia sẻ và kết nối với anh em và cũng cảm ơn những chia sẻ. > Cũng rất vui sau meetup có rất nhièu anh em nhận mail trở thành kiến trúc sư tier1. > Anh em điểm danh nào @Arcvnbuilders

Last week, the DevRel team had the opportunity to visit Türkiye, to share about what we've been building with @arc, and our developer toolings such as the Circle Agent Stack and App Kits, but more importantly, to connect with builders on the ground. We've held 5 events over the course of 3 days: an Arc community meetup, a main event headlined by our CEO, @jerallaire, 2 developer workshops (with a surprise drop-in sharing and Q&A session by Jeremy), and a happy hour to close. Hundreds came through -- from founders, builders, and developers at the meetup and workshops, to C-level leaders from banks, institutions, and exchanges at the main event, with some flying into Istanbul from across the country just for the events. You don't get that kind of intensity unless a market is serious about building onchain. And Türkiye is by far one of the markets that feels most alive onchain right now. What struck me the most was that many builders showed up knowing about our tech stack. They weren't there just for affirmation, but to connect, go deeper and to build, with many already building on Arc Testnet. Across all the conversations I've had, if there was one constant, it was stablecoins -- not as a trade, but as everyday money. People here talked about how even their moms and grandmothers buy stablecoins and other digital assets. That kind of everyday adoption is rare anywhere else. We came to teach, and left having learned just as much. So thank you to everyone who showed up -- the Architects, the founders, the builders. Türkiye, this was chapter one 🇹🇷 Huge shoutout to @ezgiyaltay, @hj_chen, and the rest of the Circle team for making it all happen!

Aerodrome 🛫

We joined forces with @thecanteenapp for the Agora Agent Hackathon. Across 252 submissions, teams built trading agents, prediction intelligence, adaptive portfolios, cross-market execution, macro and geopolitical forecasting, and social trading, powered by Arc and Circle infrastructure. We were amazed by 183 open-sourced submissions, free to fork and build on. Here’s what the winning teams built: 🥇1st place Mimir: An open-source toolkit for building AI-powered claim and prediction markets with USDC. https://t.co/uu8MfsNf2k 🥈2nd place Precall: AI-powered prediction market signals built on Arc and Circle rails for leveraging USDC-bonded calls. https://t.co/Fs3wxJxgJl Arcane: A zero-setup, fork-ready repo adding an agent-trustability layer on Arc. https://t.co/tB19V5dcjt 🥉3rd place Shadow: An Arc agent toolkit for policy-controlled USDC copy trading, MirrorRouter allows agents to mirror or block trades, while emitting receipts for onchain reputation and PnL. https://t.co/sInDKIuCpu Stoa Insight Bot: open-source repo for multi-agent trading, with reusable x402 verification, confidential transfers, redacted trace pinning, and tamper-evident audit trails. https://t.co/Ybg5U2L0C0 Huge thanks to everyone who participated and congratulations to our winners! Catch all the demos and stay tuned for upcoming winner livestreams: https://t.co/9vEzlQqmHi

SafePal will support @arc from day one Manage your ARC ecosystem assets securely and seamlessly, all in one place. Stay tuned for more updates 🌟 https://t.co/6oZCxw5Igc

Liquidity infrastructure for stablecoin FX is building on Arc. @AerodromeFi is coming to Arc, deploying its exchange infrastructure to help power Arc’s stablecoin-native ecosystem. This launch unlocks: → Deeper markets for FX swaps and liquidity provision → A proven way to bootstrap stablecoin liquidity on Arc → Capital-efficient infrastructure to help grow onchain economies More to come.

sample apps! sample apps! sample apps! @arc @buildoncircle looking for a head start? we've been publishing a growing collection of sample apps that demonstrate real-world use cases powered by USDC, Arc, Circle Wallets, Gateway, and related developer tools. have you forked a sample app yet? 👀 i just posted our directory of current sample apps: https://t.co/jXpGHfMIWE

On the heels of the Privacy Sector announcement the other day, we're also publishing exciting research we've made on the Multi-proposer front Introducing the Arc Multi-Proposer Protocol (AMP) AMP brings (i) bounded inclusion and (ii) stronger ordering guarantees so that user flows on Arc have the best experience possible on decentralized infra Brief explanation: Most network let a single validator decide what's in the next block and in what order. That discretion is where MEV lives, and it's the kind of discretion traditional markets explicitly regulate AMP introduces a new role: proposers Proposers have a super-power: they bundle user transactions into Payloads and broadcast them to validators. Once a Proposer talks to quorum of validators, then their Payload __must__ appear in the next block, in a fixed order. There is still a block assembler, but it no longer has discretion over what goes into a block. If inclusion and ordering matter to your flows and your users, then AMP gives you a direct path to validators with protocol-enforced guarantees We're actively looking for design partners! DM me, or subscribe here and we'll get back to you: https://t.co/Ft5F8DFlHl

Boream & Boredley paused for pink sprinkle donuts. The old financial system pauses for banking hours, settlement windows, FX delays, and manual approvals. Arc is built for what should not have to wait: → 24/7 onchain FX → Stablecoin-native payments → Sub-second finality https://t.co/m8bhgHP2H7

Aave Labs published a Temp Check to deploy Aave V4 on @arc. Arc is an L1 built by @circle for digital dollar liquidity and real-world assets. The deployment would make Aave foundational infrastructure for the institutions using and building on Arc. https://t.co/f9swCwGfq9

Lending infrastructure is building on Arc. @Aave V4 is exploring coming to Arc, to bring cutting edge liquidity protocol infrastructure to Arc’s stablecoin-native ecosystem. This would give builders: → Familiar onchain liquidity protocol infrastructure → Stablecoin-native lending and borrowing flows → Featuring Arc’s native asset set at launch, including USDC, EURC, and cirBTC More to come.

The @Arc Programmable Money Developer Series is live. Learn to build on the first L1 where stablecoins are native infrastructure - not an afterthought. Cross-border payments. Multi-currency apps. Agent-driven finance. 4-week async bootcamp → hackathon → accelerator programme London-based workshops and activations at Encode Hub throughout! Bootcamp applications now open ↓

Arc 🤝 @goldskyio Goldsky is joining the Arc ecosystem with support from the Arc Builders Fund to offer critical data infrastructure for teams building on Arc. That means developers on Arc can build with faster, more reliable access to the real-time onchain data their applications depend on. → Real-time indexing and data streaming → Scalable access to onchain data → Capital and ecosystem support through Arc Arc backs the infrastructure builders need to move faster.

QCAD is on @arc Testnet 🇨🇦🌐 QCAD joins USDC and EURC as one of the stablecoin assets on the Arc network. This integration supports Circle's StableFX, transforming the $150B daily USD/CAD corridor: • Atomic (T+0) Settlement: No more waiting. • Minimal Settlement Risk: Deterministic sub-second finality. • Improved Capital Efficiency: Move capital with faster settlement certainty. The future of Canadian dollar finance is no longer a vision. It's being built on Arc. https://t.co/SKKQK8VFfC

Huge shout out to @lynnthelight of the community who kicked off a new series on YouTube for all the young devs looking for chain to build on “Why Build on @arc as a developer?” Full video: https://t.co/AJxU6xtELT https://t.co/yfm92jLNUy

With minimal marketing @hibachi_xyz has amassed over $700B in USDC trading volume with around 50k users! Co-Founder Chip Dempsey breaks down why they chose @circle and why they’re excited about @arc https://t.co/18AKxckeqT

Money onchain doesn’t come with these value transfer limitations due to legacy rails. You can move any amount of value instantly with @circle + @arc. Circle docs: https://t.co/86k69wLSwB Arc docs: https://t.co/EHdFUTBkXO https://t.co/rsZ4ay0fUW

Arc returned for a second hackathon last weekend as we welcomed over 150 builders to create something new on @Arc Our builder space was bustling over the weekend seeing over 100 submissions and $10k in prizes distributed across 5 tracks. Overall winners: 🥇 USDC-ME - $2,500 | Nanopayments 🥈 Blink - $1,000 | Laptop insurance paid by the second via nanopayments Bounty winners: 🏅 Chariot - $1,000 | Cross-chain collateral lending on Arc 🏅 Mean-Time - $1,000 | Chain abstracted USDC liquidity 🏅 Settl - $1,000 | Global USDC payout infrastructure 🏅 Zerra - $1,000 | One-click onchain USDC storefronts 🏅 OTTO - $1,000 | Autonomous AI treasury agent 🏅 Sphere - $1,000 | Spherical treasury management Big up every team who hacked through the night 🫡 @Arc @BuildOnCircle

Arc DeFi and Enterprise Hackathon is happening at the Hub this weekend... To get the builder's started for the weekend we had @bleso_a from the @Arc team deliver an Arc 101 workshop! https://t.co/XbA6BKPmKe

We gave 1K+ builders a mission: build a new economy. Result: 100 apps redefining commerce with @BuildOnCircle & @arc. Autonomous money is here. The value creation curve just started. https://t.co/SQefttbSky

We unlocked @Circle’s tech-stack for the top 1% builders and just shipped 100+ new apps on @arc. Agentic Commerce is moving real money onchain. https://t.co/Jl3NyOwSjN

ETHGlobal Hackathon project Sugarc: AI-agent powered invoice factoring for 30/60/90-day invoices with instant USDC liquidity on Arc — agentic underwriting, real-world cash flows, and seamless onchain settlement. #ETHGlobal #HackMoney #Circle #USDC #Arc https://t.co/I84MvGWUve

Our final partner announcement for Multichain Day | ETHDenver 2026 is officially LIVE! Huge thanks to all of our partners for supporting our 10th Multichain Day! 🙏 ✔️ @0G_labs ✔️ @AleoHQ ✔️ @arc ✔️ @FilFoundation ✔️ @hedera ✔️ @superformxyz 🗓️ RSVP: https://t.co/QvlHtbbnPJ

Circle’s 2025 Year in Review is live. For years we have been building toward an internet financial system where value moves as easily as information. In 2025 that vision came into sharper focus. → Global frameworks in the US and beyond advanced, signaling a clear path for fully reserved digital currencies and onchain settlement to move into mainstream use. → Circle’s IPO and conditional national trust charter approval reinforced our commitment to transparency, strong governance, and rigorous risk management. → Growth of USDC, EURC, and USYC as programmable assets across payments, treasury, FX, and capital markets. → How @Arc, the Economic OS for the internet, unites programmable money and onchain innovation with real-world economic activity. From faster remittances to programmable treasury and near-instant cross-border settlement, these shifts point to an open, more inclusive internet-native financial system. Read Circle’s 2025 Year in Review: https://t.co/y5Ptrwz4QJ

We’re teaming up with @BlockradarHQ Co-Founder and CEO @iamnotstatic for a hands-on workshop showing how Circle Gateway powers their stablecoin wallets and what their latest expansion unlocks for builders on Arc. Live on 𝕏 this Thursday at 10am ET. We’ll cover: → Integrating Gateway into your app → Extending Gateway to end user wallets → Master and child wallet behavior → Live developer Q&A Technical walkthroughs. Real workflows. Built on Arc.

Buenos Aires builders just stress-tested the Arc testnet in the best way: shipping. From advanced stablecoin logic to cross-chain USDC, treasury automation, and AI wallets, these projects show what onchain finance can look like. More like this in 2026.

USDC Expansion is here! Hyperlane has integrated @Circle CCTP V2 to efficiently rebalance @USDC liquidity across supported chains: Arbitrum, Avalanche, Base, Ethereum, HyperEVM, Ink, Linea, OP Mainnet, Plume, Polygon PoS, Sei, Sonic, Unichain, World Chain, and more... https://t.co/dDNnRTRSv3

We’re excited that Para has been selected as an early developer building on @Arc public testnet ✴️ Proud to be a Day One Architect building the Economic OS for the internet alongside the Arc team