Why add Polygon (Matic) to MetaMask?
Polygon (Matic) is an EVM-compatible network that offers much lower gas fees than Ethereum mainnet for many DeFi and NFT actions. Why add it? Two simple reasons: cost and access. You get faster, cheaper transactions, and you can interact with Polygon-native dApps that won't work on Ethereum without bridging.
In my experience, adding Polygon is usually the first step when you want to try cheaper swaps, stake on Polygon-based protocols, or collect NFTs issued on the chain. But always verify the network details before you add them (scam RPCs exist).
Quick network details (what to enter)
Below are the common fields you’ll need if you choose to add Polygon (Matic) manually.
(Those values are commonly used public endpoints. Always verify against an official source.)
How to connect Matic to MetaMask — Desktop (step-by-step)
This explains how to connect Matic mainnet to MetaMask in the browser extension.
- Open the MetaMask extension and unlock your wallet.
- Click the network dropdown at the top (usually says “Ethereum Mainnet”).
- Choose “Add Network” (or open Settings → Networks → Add Network).
- Fill the fields from the table above (Network Name, RPC URL, Chain ID = 137, Currency Symbol = MATIC, Block Explorer URL).
- Click Save and then switch to the new network from the dropdown.
What I've found is that using a well-known RPC URL (like https://polygon-rpc.com) reduces the chance of timeout errors. And if you ever see weird transactions or prompts, disconnect the dApp and re-check the network.
If you'd rather add a custom network in a more general walk-through, see Add custom networks for a wider checklist.
How to connect Polygon to MetaMask — Mobile (step-by-step)
Mobile steps are similar but the UI is slightly different.
- Open the MetaMask mobile app and unlock it.
- Tap the menu (top-left) → Settings → Networks.
- Tap Add Network → Add Custom Network.
- Enter the same fields as above (RPC, Chain ID 137, symbol MATIC, explorer URL).
- Save and switch networks.
You can also add Polygon when a Polygon dApp asks to switch networks in the in-app browser — MetaMask will show a prompt. Always review the RPC values before you accept. For mobile dApp linking via WalletConnect, see WalletConnect guide and Connect WalletConnect.
Add tokens & manage balances on Polygon
After you switch to Polygon, MATIC appears as the native token. For other tokens on Polygon you typically need to import them by contract address:
- In Assets, tap Import tokens.
- Paste the token contract address (get it from the project site or Polygonscan).
- MetaMask should auto-populate symbol and decimals; confirm and add.
To hide spammy tokens: find the token in your Assets, tap its menu, and choose Hide Token. If you need to revoke token allowance for a dApp, follow the steps in our guide on Revoke token approvals.
Using DeFi and dApps on Polygon with MetaMask
Most Polygon dApps will detect MetaMask once you're on the Polygon network (in the extension they use the injected provider; on mobile you can connect via the in-app browser or WalletConnect). Will your in-wallet swap work on Polygon? Sometimes yes. MetaMask supports swaps, but many users prefer connecting to a Polygon-native DEX and authorizing a swap there.
Thinking of bridging assets? Bridges are handy but carry risk. Read our guide on Bridges & cross-chain transfers before moving large sums.
If you're connecting to a specific DeFi protocol, check their docs for the correct network and token addresses (wrong network = lost tokens).
Gas fees & L2 considerations
Polygon transactions use MATIC for gas and are generally far cheaper than Ethereum mainnet. MetaMask displays gas settings according to what the network supports. Some networks implement EIP-1559 style fields; others use legacy gas fields — MetaMask will adapt the UI.
If you’re used to Ethereum gas mechanics, be aware that fee amounts will be much smaller on Polygon. That makes experimentation cheaper (but not risk-free).
For more on how fees differ across networks and L2s, see Gas fees & L2.
Security, backups, and common mistakes
Security advice I repeat every time: never paste your seed phrase or private keys into a website. MetaMask is a software (hot) wallet; it stores private keys locally. If you want extra protection, connect a hardware wallet — instructions at /connect-ledger and /connect-trezor.
Common mistakes I’ve observed:
- Adding a malicious RPC with a wrong Chain ID. (Verify Chain ID = 137.)
- Importing token contracts from unofficial sources. (Use Polygonscan or the project’s official docs.)
- Approving unlimited token allowances without revoking them later. See /token-approvals-revoke.
If you want backup guidance, read /backup-recovery-seed and compare cloud vs paper options at /backup-cloud-vs-paper.
Who should add Polygon to MetaMask — and who should look elsewhere
Who it suits:
- Active DeFi users who want low-fee swaps and staking on Polygon.
- NFT collectors buying Polygon-native collections.
- People testing smart contracts on an EVM-compatible network with cheap gas.
Who should look elsewhere:
- Users who require the highest security for large balances (consider hardware or multisig solutions, see /multisig-gnosis).
- Users whose activity is strictly on non-EVM chains (e.g., Solana — see /solana-limitations).
Troubleshooting: common problems and quick fixes
- RPC errors / timeouts: try another RPC endpoint or switch networks and back. Check internet connection.
- Transaction stuck: use MetaMask’s Speed Up or Cancel if available, or check the nonce and re-submit with a higher gas price.
- Tokens not visible: import the token contract (use Polygonscan to verify address).
If problems persist, see /troubleshooting-connect and /troubleshooting-dapp-connections.
FAQ
Q: Is it safe to keep crypto in a hot wallet like MetaMask?
A: Hot wallets are convenient but carry higher risk than cold storage. For everyday amounts and DeFi interactions, many users accept the trade-off. For large sums, use a hardware wallet or multisig.
Q: How do I revoke token approvals on Polygon?
A: Use an on-chain approvals tool compatible with Polygon or follow our step-by-step at /token-approvals-revoke. Always confirm the contract address and approvals you revoke.
Q: What happens if I lose my phone?
A: If you have your seed phrase backed up, you can restore your wallet on another device. If not, funds may be unrecoverable. See /backup-recovery-seed and /lost-phone-recovery.
Q: How do I remove Polygon from MetaMask?
A: Go to Settings → Networks, find Polygon Mainnet, and remove it. That deletes the network from the UI but doesn't affect tokens on-chain.
Conclusion & next steps
Adding Polygon (Matic) to MetaMask is a low-friction way to access cheaper gas and a broad set of DeFi and NFT applications. Follow the steps above, double-check the RPC and chain ID (137), and start with small amounts while you test.
If you haven't installed MetaMask yet, start at /install-metamask-extension or /install-metamask-mobile-app. For token management, approvals, and bridge safety, see /token-management and /bridges-crosschain.
Want hands-on walkthroughs? Check related guides: Add Custom Network, Revoke Token Approvals, and Gas Fees on L2.
Try adding Polygon using the steps in this guide, and if you run into anything unexpected, the troubleshooting links above usually help get you back on track.
