arb.eth: ENS usernames for Arbitrum One

arb.eth is a service that provides ENS usernames for users on the Arbitrum One network, allowing them to replace long hexadecimal wallet addresses with readable names like user.arb.eth. The platform offers offchain name issuance with a flat fee of 0.01 ETH, zero gas costs, and a verification process using CCIP-Read. Claimed names are compatible with ENS-enabled wallets, apps, exchanges, and explorers such as MetaMask, Rainbow, Coinbase Wallet, and Etherscan.

Users can claim a name such as alice.arb.eth directly through the Arbitrum app. The name maps to their Arbitrum address and can be used anywhere ENS is supported, allowing wallets and apps to send to alice.arb.eth instead of a hex string. Reverse resolution can also display the name across compatible wallets, explorers, and dapps.

The service operates on a flat fee of 0.01 ETH to issue a name, with zero gas costs because issuance happens offchain. The offchain mint is verified onchain via CCIP-Read, ensuring the name resolves correctly without requiring users to pay gas fees for the initial claim.

The resolution model can evolve over time without requiring users to migrate to a new namespace. Arbitrum can choose the infrastructure that best fits its needs, including offchain with CCIP-Read, Ethereum mainnet for permanence, or Arbitrum L2 for lower costs and native integration.

The architecture is proven at exchange scale, similar to how world.id operates for World App's millions of verified users. Other examples include uni.eth for Uniswap free wallet usernames and base.eth for Coinbase / Base Basenames, all built on ENS infrastructure.

The same gateway that answers wallets can answer AI agents, making names machine-readable for Claude, Cursor, and any MCP client. This allows agents to resolve, verify, and claim arb.eth names with no keys and no scraping.

Every claim, primary-name switch, and record update is a resolvable ENS event that can be watched in real-time. The live activity feed shows the namespace coming alive as names are claimed and records are updated.

The service is built on top of the existing ENS protocol, leveraging arb.eth as a native ENS name to give Arbitrum control over its own username system. This approach requires no import and allows Arbitrum to control the infrastructure end to end.

The service is described as an independent technical demonstration of ENS DNSSEC name import and offchain subname issuance. It is not affiliated with, endorsed by, or operated by the Arbitrum Foundation or Offchain Labs.

The platform allows users to choose how arb.eth names resolve, including offchain, Ethereum mainnet, or Arbitrum L2. This flexibility ensures the system can adapt to different needs without locking users into a single infrastructure.

The service supports offchain minting which resolves in MetaMask, Rainbow, Coinbase Wallet, and Etherscan. These integrations ensure that the names work across a wide range of ENS-enabled applications and explorers.

The issuance process takes approximately 2 seconds to issue a name. This speed is achieved through the offchain minting mechanism, which avoids the need for onchain transactions for every claim.

The live activity feed shows 1,203 names claimed with ~12.03 revenue. This data is simulated for demonstration purposes but reflects the real-time nature of the system.

The official website of arb.eth: ENS usernames for Arbitrum One is arb.domains.

On Trustburn, arb.eth: ENS usernames for Arbitrum One has a rating of 4.3 out of 5 based on 4 reviews.