How to add a custom network

MetaMask lets you connect to many different networks. Before adding one manually, check whether it’s already supported by default.

Default networks

Ethereum • Linea • Base • Solana • Bitcoin • Polygon • BNB Chain • Arbitrum • OP • Sei • Avalanche • zkSync Era

Adding a popular network

On both Mobile and Extension, you can easily add several networks with just a click:

Extension
Mobile

Click on the menu in the top right and select 'Networks'.

MetaMask extension dropdown menu networks

Scroll down until you see the 'Additional networks' section and click 'Add' next to the network you wish to add.

MetaMask extension networks menu add additional network

Alternatively, you can also search for the network to add in the search bar.

MetaMask extension networks menu search for network

Adding a network manually

If you don’t see a desired network in the list, you can follow these instructions to establish the network connection manually:

Extension
Mobile

Click on the menu in the top right and select 'Networks'. This will display a list of networks that you've added already.

MetaMask extension dropdown menu networks

Click 'Add a custom network'.

MetaMask extension networks menu add custom network button

A screen will appear where you can enter the details of the network you wish to add. คลิก 'Save' (บันทึก) เพื่อเพิ่มเครือข่าย

MetaMask extension add custom network modal form

Adding or editing RPC URLs

RPC ย่อมา Remote Procedure Call ซึ่งเป็นชุดของโปรโตคอลที่อนุญาตให้ไคลเอนต์ (เช่น MetaMask) สามารถโต้ตอบกับบล็อกเชน You can add multiple RPC URLs for a single network and edit the default RPC URL from your list of networks in both Extension and Mobile settings.

หมายเหตุ

Adding a custom RPC URL to Ethereum, Linea, Base, Arbitrum, or BNB Smart Chain RPC will disable Smart Transaction capabilities like MEV protection. To re-enable this, you'll need to switch back to the default RPC URL from network settings.

Extension
Mobile

Click on the menu in the top right and select 'Networks'.

MetaMask extension dropdown menu networks

Locate the desired network you want to edit and click the 3 dots to edit.

MetaMask extension networks menu edit network details

Select the Default RPC URL dropdown field and click “Add RPC URL”.

MetaMask extension networks menu edit network add rpc url

Enter the URL, nickname, and save your configurations.

You can now toggle between various RPC URLs when you want to switch providers. To delete any RPC URL, follow the same steps above and click on the trash bin icon to delete.

Networks across devices

Adding a network on one device does not mean it will appear on another device when accessing the same account. If you add it on Extension, it will not automatically be added to your MetaMask Mobile app yet, and vice versa.

Custom networks will also need to be re-added if you uninstall the browser extension or mobile app (after which you'd need to restore your wallet using your Secret Recovery Phrase).