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Arc, the EVM-compatible Layer-1 blockchain that uses USDC as its native gas token, has designated MetaMask as its default wallet for user and developer onboarding. The move pairs the most widely used self-custody wallet in crypto with a chain specifically designed to make stablecoin transactions feel as intuitive as swiping a debit card.
The partnership means MetaMask will come pre-configured to support the Arc network across both its browser extension and mobile clients, complete with native USDC display and built-in bridge and swap functionality.
What Arc is actually building
Arc is linked to Circle, the company behind USDC, and it takes a fundamentally different approach to gas fees. Instead of requiring users to hold a volatile native token to pay for transactions, Arc lets them pay directly in USDC. On the testnet, which has been live since October 2025, transaction costs have averaged around $0.004.
The chain finalizes transactions in under one second and runs a permissioned validator set, a design choice that signals clear ambitions toward institutional-grade applications.
Mainnet launch is scheduled for September 16, 2026. Arc has already lined up an ecosystem roster that includes Ledger, Fireblocks, and Binance Wallet joining MetaMask as day-one partners. On the protocol side, anticipated integrations include Aave, Morpho, and Uniswap.
The testnet uses Chain ID 5042002, and Arc’s documentation already includes both one-click and manual setup flows for MetaMask.
Why MetaMask matters here
For Arc specifically, the MetaMask integration solves a chicken-and-egg problem. A USDC-native chain is only useful if people can easily get USDC onto it and interact with applications without a five-step tutorial. MetaMask’s recent updates have incorporated native USDC handling, meaning users won’t need to manually add token contracts or fumble through bridge interfaces to see their balances.
The institutional play behind the USDC gas model
Using USDC as a gas token is not just a user experience upgrade. It’s a deliberate play for institutional capital that has been sitting on the sidelines of DeFi partly because of the operational headache of managing volatile gas tokens. On Ethereum, institutions need ETH for gas, which means a separate token treasury, exposure to ETH price volatility, and accounting complexity. On Arc, the same team pays for everything in the stablecoin they already hold.
The permissioned validator set reinforces this institutional focus, providing the kind of known-counterparty guarantees that regulated financial institutions require before committing real capital to on-chain infrastructure.
Transaction finality under one second also matters in this context. Traditional finance settles most transactions in one to two business days. Offering sub-second settlement at $0.004 per transaction is the kind of value proposition that gets attention in boardrooms.
What to watch going forward
The lineup of DeFi protocols expected to integrate, including Aave, Morpho, and Uniswap, will be the most important metric to track. A Layer-1 without liquidity and lending markets is a highway with no on-ramps.
Circle’s involvement gives Arc a structural advantage that would be difficult to replicate, since USDC’s issuer has every incentive to make this particular chain succeed.
Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our Editorial Policy.
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