Arc Mainnet now lets users pay blockchain fees in USDC instead of volatile native tokens. This change could make payments, treasury work, and DeFi smoother for companies and AI agents using stablecoins.
Blockchain users have always had to keep two assets on hand: one for business, another just to pay fees. Arc Mainnet wants to change that. By letting people pay network fees with USDC, Arc is betting this new model will change how payments, DeFi, and automated agents work on blockchains.
Arc, launched by Circle on September 16, 2026, is one of the first public blockchains to use USDC as its main gas asset. Users no longer need to hold a volatile token like ETH or SOL just to cover network fees. Now, they can pay fees with the same dollar-based stablecoin they use for business. This isn't just a technical update. It's a big shift in how blockchains handle user experience, company finances, and protocol economics.
At launch, Arc Mainnet started with USDC as its native gas asset, allowing all transaction fees to be paid directly in stablecoins rather than volatile tokens.
Why stablecoin gas matters
On most blockchains, users have to keep a separate balance of the network's native token for gas, even if all their business is in stablecoins. For example, sending USDC on Ethereum still needs ETH for fees. This creates problems for companies, payment processors, and AI agents. They have to manage several assets, watch token prices, and make sure every wallet has enough of the right gas token. If a wallet only has USDC but no ETH, the transaction fails-even if there's plenty of money in dollars.
Arc's USDC gas model removes this split. Now, users pay fees in USDC. The same asset covers both business and network costs. For companies handling thousands of stablecoin payments or running many wallets, this cuts down on headaches, makes accounting easier, and helps predict costs. It also matches how most businesses pay expenses: in dollars, not in tokens that swing in value.
How Arc's fee model works
Arc's fee system borrows from Ethereum's EIP-1559 but tweaks it to avoid sudden price jumps when the network gets busy. Instead of letting gas prices spike, Arc uses an exponentially weighted moving average to adjust its base fee. This keeps costs steadier and more predictable. The network still charges for block space and computing, but the fee is always in USDC. Users don't have to worry about both network congestion and token price swings at the same time.
Arc also lets developers sponsor transactions. Apps can pay gas for users, making fees almost invisible. This lowers the barrier for payments and automated transactions. It's especially useful for AI agents that need to make lots of small transactions without juggling different tokens or writing extra wallet code.
Arc launched with institutional validators including BlackRock, Visa, Mastercard, DTCC, and Standard Chartered, highlighting its focus on financial markets and real-time money movement. The network uses EVM compatibility (chain ID 5042) and targets sub-second finality with base fees around $0.01 per transaction.
Who benefits and what changes
Enterprises and payment firms have the most to gain from stablecoin gas. Managing just one asset for both business and fees makes treasury work simpler and lowers the risk of failed transactions from missing gas tokens. For AI agents and automated systems, it's easier: one USDC balance does it all, so there's less wallet code and fewer errors to handle.
But not every blockchain will copy Arc. Big networks like Ethereum and Solana use their native tokens for more than just gas. These tokens help secure the network, pay validators, and hold protocol value. Switching to stablecoin gas would mean a major change in how these networks work and stay secure. Arc's model fits best for blockchains focused on payments, stablecoin finance, and institutional settlement, where predictable costs and simple operations matter most.
As of Arc's launch, USDC is natively supported on 38 blockchains, including Ethereum, Solana, Base, Arbitrum, and Stellar. Stablecoin gas isn't everywhere yet, but it shows that the old gas model doesn't fit every need. For networks built around payments, the logic is simple: if stablecoins drive the main activity, letting users pay fees in the same asset cuts friction and makes on-chain finance easier to use.
Stablecoin gas doesn't mean fees never change. Network demand and congestion still affect costs, but the fee is always in dollars. This matters for businesses and developers who need to budget and plan in dollars, not in tokens that can jump or drop in value. For more on how big-picture economics shape stablecoin demand and liquidity, see EgonCoin's recent coverage.
Risks and trade-offs
Switching to stablecoin gas brings new risks. If a blockchain depends on one stablecoin issuer for fees, it faces centralization and infrastructure risks. If the issuer has technical trouble, faces regulation, or loses trust, the network's transactions could be at risk. There's also the problem of multi-currency setups: if different blockchains use different stablecoins for gas, cross-chain payments and fee management get more complicated.
Another issue is the native token's role. On many blockchains, the native asset isn't just for fees. It supports staking, validator rewards, and network security. Moving to stablecoin gas means these systems may need to be redesigned, especially for networks that want to stay decentralized. Also, making gas payments easier doesn't remove the need for strong protections against spam, abuse, and congestion at the protocol level.
Arc's move to USDC gas is a clear bet that the next wave of blockchain growth will come from stablecoin payments, institutional finance, and automated agents-not just crypto traders. By matching network fees to the assets businesses already use, Arc is bringing blockchain infrastructure closer to how global payments and company finance work. Whether this model becomes standard or stays niche will depend on how other networks weigh user experience, security, and incentives.
Circle says USDC is now natively supported on 38 blockchains as of September 16, 2026. Arc's mainnet launch is the first time USDC is used as the native gas asset on a public Layer 1 blockchain. The fee system aims to keep transaction costs steady, but actual fees still depend on network demand and block space. Arc's approach is built for payments, finance, and AI agent use cases where cost predictability matters most.
Stablecoin gas models show a basic trade-off in blockchain design: making things simple for users versus keeping the protocol secure. Paying fees in USDC can make on-chain payments feel more like regular digital transactions, but it also means new dependencies on stablecoin issuers and their systems. For networks focused on stablecoin payments and institutional use, this trade-off may be worth it. For general-purpose blockchains, sticking with a native token still brings advantages in security, governance, and economic design. As blockchain tech moves forward, the choice of gas asset will show what each network values and who it's built for.
