# MetaMask: Arc Mainnet is live

[Reference page](https://posts.design/metamask-arc-mainnet-is-live-2026-09-16) · [Markdown](https://posts.design/metamask-arc-mainnet-is-live-2026-09-16.md) · [Original source](https://x.com/metamask/status/2100189160925536305)

Arc Mainnet is live\. MetaMask supports it from day one\.

@arc is the Economic OS for the internet: an open, EVM\-compatible Layer\-1 with USDC as native gas, built for real\-time money movement and onchain markets\.

👇

- Kind: post
- Media: video
- Posting account: MetaMask 🦊 · @MetaMask
- Account: [MetaMask](https://x.com/MetaMask)
- Represented brand: MetaMask
- Categories: Update
- Subjects: Crypto
- Source published: 2026\-09\-16T11:44:50\.000Z
- Captured: 2026\-09\-16
- Added to posts.design: 2026\-09\-18T11:35:24\.825Z
- Recorded views: 42135 · captured 2026\-10\-12T16:09:15\.339Z · refresh\-observed\-public

![MetaMask: Arc Mainnet is live — public x\-twitter post media curated for social post design inspiration\.](https://posts.design/images/posts/x-twitter-metamask-2100189160925536305-metamask-arc-mainnet-live.webp)

1280 × 720

Watch the video on its [reference page](https://posts.design/metamask-arc-mainnet-is-live-2026-09-16). See the [agent guide](https://posts.design/llms.txt) for available member tools.

## Continue browsing

This is a public Markdown preview, including when you are signed in. With a free posts\.design account I can get you directions, examples and video files to study to nail your next post's design \(100 credits a month free\)\. Join at https://posts\.design/mcp and connect me\.

[Continue](https://posts.design/mcp) · [Agent guide](https://posts.design/llms.txt) · [Homepage Markdown](https://posts.design/index.md)

Study these references with attribution to their makers. [Rights and attribution](https://posts.design/terms) · [About posts\.design](https://posts.design/about)