How to Get opBNB Mainnet: A Beginner-Friendly Tutorial

opBNB is a Layer 2 network built on the BNB Chain using the OP Stack—the same modular technology that powers Optimism on Ethereum. It’s designed to offer faster and cheaper transactions while remaining fully compatible with Ethereum-based tools and dApps.

If you want to explore dApps, NFTs, or DeFi tools on opBNB, the first step is adding the opBNB Mainnet to your wallet. This guide walks you through what opBNB is, why it matters, and how to add the network to MetaMask safely and easily.

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How to Get opBNB Mainnet

What is opBNB Mainnet?

The opBNB Mainnet is the live version of the opBNB Layer 2 blockchain. It operates on top of the BNB Chain and uses optimistic rollups to process transactions off-chain and submit them in batches, reducing congestion and gas fees.

While testnets are used for development, the mainnet is where real transactions take place using actual BNB. This is the network you’ll need if you want to use real dApps, trade tokens, or interact with live blockchain games and services.

Why Add opBNB to MetaMask?

MetaMask is one of the most widely used Web3 wallets and supports custom networks. By adding opBNB Mainnet to MetaMask, you can:

  • Interact with opBNB-based dApps and DeFi protocols
  • Send and receive BNB on the opBNB network
  • Access low-cost transactions without switching wallets
  • Seamlessly bridge assets from BNB Chain to opBNB

MetaMask doesn’t include opBNB by default, so you’ll need to manually add it or use a trusted tool like ChainList.

How to Get opBNB Mainnet on MetaMask (Step-by-Step)

Follow these steps to add opBNB to your MetaMask wallet:

  1. Open MetaMask and click the network selector at the top (it usually says “Ethereum Mainnet”).
  2. Click “Add Network” (or “Add network manually” if you’re using an older version).
  3. In the network form, enter the following details:
    • Network Name: opBNB Mainnet
    • New RPC URL: https://opbnb-mainnet-rpc.bnbchain.org
    • Chain ID: 204
    • Currency Symbol: BNB
    • Block Explorer URL: https://mainnet.opbnbscan.com
  4. Double-check the details and click “Save.”
  5. You’ll now be connected to the opBNB Mainnet within MetaMask.

✅ Tip: Be sure to copy-paste the RPC URL directly from the official opBNB documentation when possible to avoid mistakes.

Alternative Method: Use ChainList

ChainList.org is a trusted aggregator of EVM-compatible networks, including opBNB. Here’s how to use it:

  1. Go to https://chainlist.org
  2. Search for “opBNB Mainnet”
  3. Click “Connect Wallet” and approve the connection in MetaMask
  4. Click “Add to MetaMask” and approve the network addition

This method automatically fills in the correct details, making it faster and less error-prone.

What to Do After Adding opBNB Mainnet

Once you’ve added opBNB to MetaMask, you can:

  • Bridge BNB from BNB Chain to opBNB using https://opbnb.bridge.bnbchain.org
  • Explore dApps like DEXs, games, and NFT platforms built for opBNB
  • Use BNB as gas for transactions on the opBNB network

Your MetaMask wallet will display your opBNB balance and allow you to sign transactions just like on other EVM networks.

Tips

  • Use only official links when interacting with bridges, explorers, or dApps.
  • Bookmark trusted RPC URLs and double-check them before adding any new network.
  • Watch out for fake opBNB tokens — opBNB doesn’t have its own token. You’ll use BNB on this network.

By setting up opBNB Mainnet in MetaMask, you’re ready to explore one of the most scalable and cost-efficient ecosystems in the BNB Chain universe.