Circle Arc blockchain launch goes live with BlackRock, Visa and DTCC as validators

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Circle has flipped the switch on Arc, a brand-new Layer 1 blockchain where every transaction fee gets paid in USDC instead of a volatile crypto token. The Circle Arc blockchain launch went live Wednesday, September 16, 2026, and it puts block production directly in the hands of some of the biggest names in traditional finance rather than an open, permissionless validator pool. That single design choice is what makes Arc one of the more closely watched blockchain debuts of the year.

Key takeaways

Circle launched the Arc mainnet on September 16, 2026, a Layer 1 blockchain that charges gas fees in USDC and runs on proof-of-authority consensus.
Eleven institutions plus Circle — including BlackRock, DTCC and Visa — produce blocks on the network.
More than 100 applications are live at launch, including Aave, Morpho and Uniswap-linked platforms.
Circle minted 10 billion ARC tokens in the US this week as a technical milestone, without committing to a public token launch.
Arc targets sub-second finality, throughput above 3,000 transactions per second, and a base gas fee of about $0.01 per transaction.

Circle Launches Arc Mainnet with Institutional Validators

Arc’s defining feature is who gets to run it. Rather than opening validation to anyone willing to stake tokens, Circle restricted block production to a fixed group of regulated financial institutions — a structure that trades decentralization for compliance and predictability.

Permissioned Proof-of-Authority Consensus by 11 Institutions plus Circle

Arc runs on proof-of-authority consensus across a permissioned set of 11 institutions plus Circle. The founding validator cohort, named by Circle on August 5, includes BlackRock, the Depository Trust & Clearing Corporation (DTCC), Galaxy, ICE, Mastercard, MoneyGram, SBI Group, Standard Chartered, Sumitomo Corporation, Visa and Worldpay. Global Payments completed its $24.25 billion acquisition of Worldpay in January. Circle’s deployment documentation describes roughly 20 SOC 2-certified validator operators coming online in phases across multiple regions, even though the announcement itself names 11 firms plus Circle as the founding cohort.

Under the hood, Arc uses Tendermint BFT consensus through Circle’s own Malachite implementation. The network claims deterministic finality in under one second with no reorganization risk, with internal benchmarks showing finality below 350 milliseconds and throughput above 3,000 transactions per second when running 20 validators. Blocks target 30 million gas on a half-second block time, and the chain is fully EVM-compatible, meaning existing Solidity contracts and developer tooling work at launch without modification.

Gas Fees Charged in USDC at Approximately One Cent per Transaction

There’s no native, price-swinging gas token here. Fees on Arc are denominated in USDC with 18 decimals, and the network’s fee documentation sets a base fee target of about $0.01 per transaction, capped at 20,000 Gwei. Arc uses EIP-1559 with exponentially weighted moving-average smoothing, which is designed to keep traffic spikes from swinging fees as hard as they do on Ethereum. Circle’s own landing page puts the average weekly transaction cost at $0.045.

This is where the Arc USDC gas fees model matters for adoption: predictable, dollar-denominated costs are easier for banks and payment firms to budget for than a token whose price can double overnight.

A Live Ecosystem: DeFi, Trading and Custody Partners

Arc didn’t launch quietly. Circle says more than 100 applications and institutional builders were live on day one, backed by a testnet that opened in October 2025 and processed over 700 million transactions, plus a developer program with more than 75,000 Arc House members.

Jeremy Allaire, Circle’s co-founder, chairman and chief executive, framed the launch in sweeping terms. “Arc is the single most significant launch in Circle’s history since USDC itself, and it is the embodiment of the premise we have operated on for thirteen years: money should work the way the internet works,” he said in the announcement.

Aave and Morpho Anchor Onchain Credit

Lending markets arrived with the chain rather than after it. Aave deployed a V4 market on Arc at launch, supported by Bitwise, Cumberland, Dialectic, Galaxy, Gauntlet, Keyrock and Steakhouse Financial through curated vault strategies, risk oversight and USDC and EURC liquidity. “We’re doubling down on the Circle ecosystem with a new Aave V4 market on Arc, bringing DeFi’s most trusted credit infrastructure to a network purpose-built to bring real-world finance onchain,” said Stani Kulechov, founder and chief executive of Aave Labs.

Morpho is extending onchain credit alongside Aave. “Arc brings together the speed, stablecoin-native infrastructure, and institutional participation needed to expand onchain credit to a much broader market,” said Merlin Egalite, co-founder of Morpho.

Trading runs through Aero — the DEX Dromos Labs created by merging Aerodrome and Velodrome last November — alongside Uniswap-linked infrastructure, 1inch, Bankr, Dinari, Doppler, edgeX, Extended, Hibachi, LI.FI, and Pump.fun, among others. Pools, the Uniswap Labs launchpad, joined as a day-one launchpad partner. Exchange access comes from Binance, Bitso, Bitvavo, Bybit, Gate, Kraken, KuCoin, MEXC, OKX, OSL, Upbit and Wenia, while Anchorage, BitGo, Ceffu, Copper, Fireblocks and Zodia Custody handle custody. Banking names attached to Arc include BNY, BTG Pactual, HSBC, Lead Bank, Societe Generale, Standard Chartered and State Street.

The ARC Token: A Technical Milestone, Not Yet a Public Launch

Circle minted its network token this week without flipping the switch on a public sale — a distinction the company has been careful to draw. Circle carried out a genesis mint of 10 billion ARC tokens in the United States this week, a move the company claims marks the first time a publicly traded firm has minted a network token for a brand-new Layer 1, though USDC will still be required to cover network fees. According to Circle, the mint represents a technical achievement and not a pledge to bring ARC to public launch.

Allaire first mentioned Circle was studying a token on the company’s fourth-quarter earnings call back in February, without giving a timeline. Both the token supply and the upcoming shift in consensus mechanism were outlined in Circle’s ARC whitepaper released in May, which sets aside 60% of the 10 billion tokens for ecosystem purposes like token sales, developer grants and growth initiatives, reserves 25% for Circle, and holds 15% back as a long-term reserve. Early-phase inflation is set at roughly 2% to 3% a year on a decaying schedule, and holders get votes on fees, inflation and burn logic, while Circle keeps control of protocol development, compliance and validator membership.

Circle has already sold some of that supply. In May, the company secured $222 million through a presale that valued it at $3 billion on a fully diluted basis, with a16z crypto putting in $75 million alongside contributions from BlackRock, Apollo Funds, ICE, ARK Invest, SBI Group, Janus Henderson Investors, Standard Chartered Ventures, General Catalyst, IDG Capital, Haun Ventures, Bullish and Marshall Wace — a number of whom have since become founding validators. Circle hasn’t disclosed what share of the total supply the presale covered or the vesting terms attached to it.

EVM Compatibility and the Road to Proof-of-Stake

Because Arc is fully EVM-compatible, developers can bring existing Solidity contracts and tooling over without rewriting anything, which lowers the barrier for teams already building on Ethereum-style chains. Circle says the network is exploring a shift from proof-of-authority to proof-of-stake in 2027, though the company hasn’t laid out a detailed schedule for that transition.

This is a genuinely important detail for anyone watching Arc institutional validators closely: the current permissioned model is explicitly framed as a phase, not the endpoint. Whether that shift actually loosens control among the founding 11 firms, or simply changes how staking works within the same closed group, remains an open question the whitepaper doesn’t fully answer.

Arc’s Bigger Bet: Settlement Rails for AI Agents

Circle isn’t just chasing banks and DeFi protocols — it’s positioning Arc as infrastructure for machines that transact on their own. According to the company, USDC represents 98.8% of transaction volume driven by agents, and it has been the dominant currency for agent-to-agent payments settled via the x402 standard ever since Circle’s Agent Stack debuted in May. Circle has not published the methodology behind that 98.8% figure.

Agent Stack Tools Enable Policy-Controlled Wallets and Nanopayments

Agent Stack ships with policy-controlled Agent Wallets, Nanopayments through Circle Gateway — capable of moving USDC in amounts as small as $0.000001 — and what Circle calls an emerging Agent Marketplace. Arc Portal lets users fund agent wallets and set spend limits, while a planned feature called AgentVM, meant to let agents process sensitive data while the chain keeps a verifiable log of results, is still in design. Two developer tools shipped alongside mainnet: Arc Studio, an onchain coding agent that generates contracts and deployment-ready code, and Arc App Kits, an SDK covering payments, swaps, onramps and yield routed through Morpho. Circle also says opt-in privacy — confidential transactions and balances using view keys — is in development for a future network-wide release rather than live today, while post-quantum signatures are already supported.

Arc’s permissioned design hasn’t gone unchallenged. Adam Cochran, a partner at Cinneamhain Ventures, argued that “this isn’t an L1 and it’s offensive to call it such,” contending that “there are never economic incentives to be a faithful validator, and that’s why they have to make it a private consortium.” Mitchell DiRaimondo, founder of Steelwave Digital, took a different angle, saying the design “isn’t DeFi, and that’s the point,” adding: “Bold? Yes. Terrible? Only if you confuse it with DeFi infrastructure.”

The launch also arrived during a rough stretch for Circle’s stock and for crypto markets broadly. CRCL shares closed at $86.30 the day before launch, down 11.41% on the day, putting the company’s market value at $21.91 billion, according to Stock Analysis data. Crypto equities broadly fell after the Senate voted 49-50 against advancing the CLARITY Act, short of the 60 votes needed for cloture. USDC itself carried a market value of $73.73 billion with $19.9 billion in 24-hour volume, per CoinGecko, while Circle’s own release put circulation above $74 billion. Separately, BeInCrypto reported that speculative traders were already positioning around Arc’s launch, drawing comparisons to the meme coin rush that followed Robinhood Chain’s July debut — a reminder that even a chain built for institutional settlement can attract retail speculation once it goes live.