# Arc

- **Chain ID:** `5042`
- **Tier:** live
- **Docs:** https://docs.arc.io/arc/references/contract-addresses

Circle's Arc L1: native USDC gas, EURC and USYC, and the StableFX settlement escrow.

> This is a live chain on Smarts. Contract pages can surface live on-chain state, recent activity, and governance.

## Query via AI agent

- **MCP endpoint:** `https://smarts.md/mcp`
- **Reference:** `chains/arc`
- **Sample prompt:** "Show me the supported contracts on Arc and summarize the highest-signal ones."

## Contracts

- **USD Coin** (`Token`) - `0x3600000000000000000000000000000000000000` - [canonical page](/usdc-arc)
- **EURC** (`Token`) - `0xbef5f6d51cb62b58e6a8f77868681825c6fe21c1` - [canonical page](/eurc-arc)
- **USYC** (`Token`) - `0x8a5d989bbb96929f689b0200f435f53da42bf490`
- **FxEscrow** (`System`) - `0xe2e5f173576b513d994073ccbdacbe027d43dfe6`
- **Multicall3** (`Infra`) - `0xca11bde05977b3631167028862be2a173976ca11`
- **Permit2** (`Infra`) - `0x000000000022d473030f116ddee9f6b43ac78ba3`

## Links

- Canonical page: <https://smarts.md/chains/arc>
- External docs: https://docs.arc.io/arc/references/contract-addresses