Harmony One Metamask Setup – Connect to Harmony Network Using Metamask

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Connecting your MetaMask wallet to the Harmony One network unlocks access to a fast, low-cost, and scalable EVM-compatible blockchain. With transaction finality in just 2 seconds and fees nearly 100x lower than Ethereum, Harmony (ONE) is emerging as a top choice for DeFi enthusiasts, NFT collectors, and dApp developers. This guide walks you through setting up MetaMask for both Harmony Mainnet and Testnet, acquiring ONE tokens, managing cross-chain transfers, and interacting with native dApps — all while ensuring seamless compatibility.

Whether you're exploring DeFi protocols like SushiSwap and Curve Finance or diving into NFT marketplaces such as DaVinci and LMA Art Gallery, having MetaMask properly configured is essential. Let’s dive in.

Why Use MetaMask with Harmony One?

While Harmony offers its own official browser extension wallet, MetaMask remains the preferred choice for most users due to its universal EVM support and integration with hundreds of decentralized applications. Unlike the Harmony One wallet, MetaMask allows effortless switching between multiple blockchains — including Binance Smart Chain, Polygon, Avalanche, and now Harmony — all within a single interface.

👉 Get started with secure crypto transactions on Harmony via MetaMask today.

However, note that staking ONE tokens is not possible through MetaMask. For staking or becoming a validator, use the official Harmony wallet or Blits mobile wallet instead.

What Is Harmony (ONE)?

Harmony is an independent, EVM-compatible Layer 1 blockchain launched in 2019, designed to scale decentralized applications with high speed and minimal cost. It achieves this through Effective Proof of Stake (EPoS) and state sharding, allowing parallel processing across four shards — each capable of handling hundreds of transactions per second.

Key features include:

Harmony also supports cross-chain interoperability via trustless bridges, enabling asset transfers between Ethereum, BSC, and other PoW/PoS chains. This makes it ideal for developers porting Ethereum-based dApps without rewriting code.

How to Add Harmony One to MetaMask

To connect MetaMask to the Harmony network, you'll need to manually add its RPC details. Follow these steps:

  1. Open MetaMask and click the network dropdown (e.g., "Ethereum Mainnet").
  2. Select "Add Network" (or "Custom RPC" in older versions).

  3. Enter the following settings for Harmony Mainnet (Shard 0):

    • Network Name: Harmony Mainnet
    • New RPC URL: https://api.harmony.one
    • Chain ID: 1666600000
    • Currency Symbol: ONE
    • Block Explorer URL: https://explorer.harmony.one/
  4. Click Save. MetaMask will switch to the Harmony network automatically.

✅ Tip: Always use Shard 0 for compatibility with exchanges and most dApps.

You can also add the Harmony Testnet using:

After setup, you can toggle between networks anytime from the MetaMask menu.

👉 Seamlessly manage multi-chain assets including Harmony via a secure wallet gateway.

Understanding ONE Tokens and Gas Fees

ONE is the native utility token of the Harmony blockchain, used for:

Despite being EVM-compatible, Harmony uses a dual-address format:

Because of this difference, direct transfers between MetaMask and exchanges often fail unless addresses are converted correctly.

Converting Between 0x and one1 Addresses

To send ONE tokens between MetaMask (0x address) and an exchange (one1 address), conversion is required.

Steps to Convert:

  1. Visit the Harmony Mainnet Block Explorer.
  2. Paste your MetaMask 0x address into the search bar.
  3. The page displays the equivalent one1 address — copy this to deposit ONE from an exchange.
  4. Conversely, paste your exchange’s one1 deposit address to get the corresponding 0x address for withdrawals to MetaMask.

🔁 Always test with a small amount first to confirm successful transfer.

Adding Custom HRC-20 and HRC-721 Tokens

Just like ERC-20 tokens on Ethereum, you can import custom tokens built on Harmony — such as HRC-20 (fungible) or HRC-721 (NFTs) — into MetaMask.

How to Import:

  1. Find the token’s contract address on Harmony Explorer or trusted platforms like CoinGecko.
  2. In MetaMask, click "Import Tokens" under the Assets tab.
  3. Paste the contract address; symbol and decimals should auto-fill.
  4. Confirm and click Add Custom Token.

⚠️ Beware of fake tokens. Always verify contract addresses via official project websites or reputable data sources.

Interacting With dApps on Harmony

With MetaMask connected, you can now explore over 50+ active dApps in the Harmony ecosystem:

Simply visit any dApp site, connect your MetaMask wallet, and start providing liquidity, swapping tokens, or playing games.

Frequently Asked Questions (FAQ)

Can I stake ONE tokens in MetaMask?

No. Staking requires the official Harmony wallet extension or Blits mobile app. MetaMask does not support staking functions on the Harmony network.

Why can’t I send ONE from Binance to MetaMask directly?

Exchanges use bech32 (one1...) addresses, while MetaMask uses hex (0x...) format. You must convert your MetaMask address to one1 format before depositing from an exchange.

Are HRC-20 tokens compatible with MetaMask?

Yes. HRC-20 tokens are functionally identical to ERC-20 tokens and can be imported manually using their contract address.

What should I do if my transaction fails?

Check:

Try resending with adjusted gas settings.

Is Harmony secure for long-term investments?

Harmony employs EPoS consensus with over 1,000 validators and regular audits. While no system is risk-free, its architecture prioritizes security, decentralization, and scalability.

Can I use hardware wallets with Harmony?

Yes. Ledger and Trezor devices work with Harmony when connected via MetaMask. Ensure your device firmware is updated and select the correct network in MetaMask.

Final Thoughts: Unlocking the Harmony Ecosystem

Setting up MetaMask for Harmony opens doors to one of the fastest-growing EVM ecosystems. With near-instant transactions, negligible fees, and robust cross-chain capabilities, Harmony empowers users to interact with DeFi, NFTs, and gaming platforms efficiently.

Whether you’re swapping tokens on Viper Swap or earning yield on Beefy Finance, proper wallet configuration ensures smooth navigation across dApps.

👉 Maximize your DeFi potential by connecting to high-performance blockchains like Harmony.

Stay informed, verify contract details, and always double-check address formats before transferring funds. The future of decentralized finance is fast — make sure you're riding on the right chain.