# arb.eth

> ENS usernames for Arbitrum. A demonstration of how Arbitrum could issue usernames like alice.arb.eth that resolve in every ENS-enabled wallet, app, exchange, and explorer.

Status: technical demonstration / pitch. The website's claim flow is simulated today; live subname issuance (via the Namespace offchain-subname platform, CCIP-Read / ERC-3668) is integrated and awaiting activation. This project is not affiliated with the Arbitrum Foundation or Offchain Labs.

## The idea

- arb.eth is an ENS name on Ethereum mainnet. Subnames (alice.arb.eth) can be issued gaslessly offchain and resolve everywhere ENS works, with no per-app integration.
- The demo is hosted on the DNS domain arb.domains. Production issuance would run under an ENS name that Arbitrum controls (e.g. arb.eth) or any DNS domain imported into ENS.
- Any ENS-capable library (viem, ethers, ens.js) resolves ENS names with no special integration.

## Planned agent endpoints (NOT yet live; do not call)

- GET /quote?name=<label>            -> price a subname (0.01 ETH flat)
- POST /register {name, owner}       -> register <label>.arb.eth, x402 payment
- MCP (Streamable HTTP): /api/mcp    -> tools: resolve_name, reverse_resolve, check_availability, register_name

## More

- /llms-full.txt : full technical context (architecture, contracts, SDK)
- Website: https://arb.domains