The zkSync Era chain ID is 324 (0x144 in hex). zkSync Era is a ZK rollup on Ethereum built by Matter Labs. Gas is paid in ETH. Below are the exact settings MetaMask asks for, public RPC endpoints we tested on October 27, 2026, and a one-click button to add the network.
zkSync Era Network Details for MetaMask
| Field | Value |
|---|---|
| Network name | zkSync Era |
| RPC URL | https://mainnet.era.zksync.io |
| Chain ID | 324 |
| Currency symbol | ETH |
| Block explorer | https://explorer.zksync.io |
Copy these values exactly. If the RPC URL returns a different chain ID than the one you enter, MetaMask stops with a chain ID mismatch warning: that usually means a typo or an RPC for another network.
zkSync Era RPC URLs (Tested October 27, 2026)
| RPC endpoint | Returned chain ID | Response time |
|---|---|---|
https://mainnet.era.zksync.io | 324 | 336 ms |
https://zksync.drpc.org | 324 | 175 ms |
We sent eth_chainId and eth_blockNumber to each endpoint from Europe on October 27, 2026; the table lists only endpoints that answered with chain ID 324. The latest block was 72,657,030. Public endpoints are free and rate limited: for an app or a bot, use a paid provider or your own node.
How to Add zkSync Era to MetaMask
- Click Add zkSync Era to MetaMask above, or open MetaMask and go to Networks → Add a custom network.
- Enter the network name zkSync Era, RPC URL
https://mainnet.era.zksync.ioand chain ID 324. - Set the currency symbol to ETH and the block explorer to https://explorer.zksync.io.
- Save and switch to the new network. Your 0x address is the same as on other EVM networks.
Tip: zkSync Era is EVM compatible, but it is not byte-for-byte identical to Ethereum. For a normal wallet this does not matter; developers should read the zkSync docs.
zkSync Sepolia Testnet
| Field | Value |
|---|---|
| Network name | zkSync Sepolia |
| RPC URL | https://zksync-sepolia.drpc.org |
| Chain ID | 300 (0x12c) |
| Currency symbol | ETH |
| Block explorer | https://sepolia.explorer.zksync.io |
Testnet tokens come from faucets and are worth nothing. Do not send real ETH to a wallet connected to zkSync Sepolia.
How to Get ETH on zkSync Era
The widget at the top of this page is set to swap into ETH on zkSync Era: pick the token you have on another network, enter your address and sign once. Routes, fees and timing are covered in our zkSync Era bridge guide.
Related
- What is a chain ID? - how chain IDs protect transactions
- How to add a network to MetaMask - the manual steps in detail
- Gas tokens by chain - what each network charges fees in
- All networks: chain ID list