Arc, a new Layer 1 blockchain developed by Circle, has officially launched the mainnet of Arc, positioning the network as an “Economic OS for the internet” — an open platform for global markets, real-time value movement, tokenized assets, and agentic economic activity. For Circle — the issuer of the USDC stablecoin that went public on the New York Stock Exchange in June 2025 — the launch moves the company beyond issuing digital dollars into operating the network where those dollars do the work.

Rather than debuting as a bare network, Arc goes live with a complete stack already operational: USDC as native gas, meaning transaction fees are paid in a dollar-backed stablecoin rather than a volatile network token, giving institutions predictable operating costs; deterministic sub-second settlement finality, under which transactions become irreversible on a fixed schedule rather than probabilistically; EVM compatibility, which lets Ethereum-based contracts and developer tooling run with minimal changes; and interoperability with more than 20 blockchains through Circle’s CCTP (Cross-Chain Transfer Protocol) and Gateway protocols.

The platform ships with a suite of developer and user tools from day one. Arc Studio is an onchain coding agent that converts natural-language descriptions into deployable applications. Arc App Kits, including Onramp Kit and Earn Kit, allow developers to embed fiat-to-USDC flows and in-app lending through protocols such as Morpho. Arc Portal serves as a unified entry point for wallets, swaps, and agent wallet creation with configurable spend limits and permissions.

Market infrastructure is live at launch. Aave and Morpho anchor onchain credit markets, while Aero and Uniswap provide trading liquidity. Circle StableFX enables 24/7 programmable foreign exchange across more than 20 fully-reserved stablecoins, with atomic payment-versus-payment settlement — both sides of a currency trade finalize simultaneously, so neither counterparty is left exposed on an unfinished leg, in contrast to traditional FX markets that close over weekends. The network also supports tokenized assetsatively, including BlackRock’s BUIDL, Janus Henderson’s JAAA and JTRSY funds, USYC, and cirBTC — Circle’s programmable Bitcoin, convertible 1:1 from BTC, cbBTC, or wBTC with independently verifiable reserves — bringing tokenized versions of mainstream money-market and fixed-income products onchain.

Institutional participation is a defining feature of the launch. The founding validator cohort — the operators responsible for confirming transactions and securing the ledger — includes BlackRock, DTCC, Mastercard, Visa, ICE, Galaxy, Standard Chartered, SBI Group, and MoneyGram (now Global Payments), a mix spanning market infrastructure, card networks, banking, and cross-border payments. Banks such as BNY, HSBC, Societe Generale, BTG Pactual, and State Street are already building on the network. Custody, compliance, oracle, and data infrastructure are provided by established firms including Anchorage, BitGo, Fireblocks, Chainalysis, TRM Labs, and Chainlink. More than 190 institutional and ecosystem builders are active across the platform.

Arc confirmed the launch in a post on X on September 16:

Arc Mainnet is live. Arc launches 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,… pic.twitter.com/SWg0NlUijO — Arc (@arc) September 16, 2026

Post: Arc (@arc) on X

Designed for AI Agents

A central design thesis of Arc is that artificial intelligence agents will become economic actors in their own right. Circle Agent Stack enables policy-controlled agent wallets and sub-cent USDC nanopayments, allowing autonomous software to hire, pay, and earn without human intervention at each step — a transaction scale that card-based payment rails, built around fixed per-transaction fees, do not economically accommodate. Early adopters of the agent stack include Alethieum, Architect, Kite AI, and Virtuals.

The platform also incorporates a provenance layer: user keys delegate scoped authority to agents, mandates are typed and reviewed by users, and execution proofs are committed onchain as tamper-evident records — addressing the trust gap that emerges when intelligence is abundant.

ARC Token Genesis Mint and Roadmap

Looking ahead, Circle has completed a genesis mint of the ARC token in the United States, creating the full initial supply of 10 billion tokens — making Circle the first publicly traded company to mint a network token for a new Layer-1 blockchain. ARC is intended to function as a coordination mechanism for security, utility, and governance, while network fees remain payable in USDC.

The mint is a technical milestone rather than a commitment to a public token launch. The network is exploring a transition from Proof of Authority toward Proof of Stake in 2027 — moving from a fixed set of approved validators to a model in which participants stake economic value to help secure the network. Additional roadmap items include opt-in privacy features enabling confidential transactions with preserved auditability — aimed at institutional users — as well as continued expansion of interoperability and high-volume stablecoin payments.

With assets, liquidity, compliance tooling, and agent infrastructure operational from block one, Arc enters a competitive field of institutional-grade settlement networks, as stablecoin payments, tokenized assets, and agentic commerce converge on the same infrastructure. Its differentiation rests on Circle’s existing regulatory footprint and the breadth of its day-one ecosystem. Whether the platform can convert this institutional alignment into sustained developer and user activity — and how the 2027 proof-of-stake exploration and privacy roadmap unfold — will define its trajectory over the coming year.

Source: Metaverse Post