What is the Base chain ID?

Base mainnet uses chain ID 8453 (0x2105 in hexadecimal). The Base Sepolia testnet uses 84532 (0x14a34).

What is the Base RPC URL?

The official public endpoint is https://mainnet.base.org, and https://sepolia.base.org for the testnet. Several third-party public endpoints also work without an account; heavy or production use wants a dedicated provider.

Which token pays for gas on Base?

ETH. Base has no gas token of its own, so you need a small amount of ETH on Base before you can transact, even if you only intend to move stablecoins.

Is Base EVM compatible?

Yes. Base is an OP Stack rollup and runs the Ethereum Virtual Machine, so Solidity contracts and Ethereum tooling work without modification.

How long does a Base block take?

Base produces a block every 2 seconds, measured by differencing consecutive block timestamps on the chain.

Base network details

Everything you need to point a wallet, a node or a contract at Base.

Network name: Base
Chain ID: 8453
RPC URL: https://mainnet.base.org
Currency symbol: ETH
Block explorer: https://basescan.org
Chain ID (hex): 0x2105

Adding Base by hand

Most wallets — MetaMask, Rabby, Trust — take the same six values. In MetaMask, open the network dropdown, choose Add a custom network, and paste the fields above. The currency symbol is ETH, not a token of Base’s own.

Coinbase Wallet and the Base app ship with Base already configured, so there is nothing to add. If a wallet rejects the RPC URL, it usually already has a Base entry and will not accept a duplicate chain ID.

Live chain state

Read from Base's public RPC when this page was built.

Latest block: 51.6M
Block time: 2s
Gas price: 0.00600 gwei
Gas paid in: ETH

Data: Base RPC · Updated Sep 20, 03:21 PM UTC

Live costs in dollars are on the gas page, and network status shows whether Base is producing blocks right now.

Public RPC endpoints

All answer without an account or an API key.

Endpoint	Operator
`https://mainnet.base.org`	Base (official)
`https://base.llamarpc.com`	LlamaNodes
`https://base-rpc.publicnode.com`	PublicNode
`https://base.drpc.org`	dRPC

Public endpoints are rate limited and shared. Anything production-shaped wants a dedicated provider.

Testnet

Base Sepolia, for deploying and testing without real funds.

Network name	`Base Sepolia`
Chain ID	`84532`
RPC URL	`https://sepolia.base.org`
Currency symbol	`ETH`
Block explorer	`https://sepolia.basescan.org`

Canonical token addresses

The contracts most often looked up. Check any address against an explorer before you send to it.

Token	Address on Base	Decimals
USDCNative USDC issued by Circle. Not the bridged USDbC.	`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`	6
WETHWrapped Ether	`0x4200000000000000000000000000000000000006`	18
cbBTCCoinbase Wrapped BTC	`0xcbB7C0000aB88B473b1f5aFd9ef808440eed33Bf`	8
DAIDai Stablecoin	`0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb`	18

Block explorers

Frequently asked

What is the Base chain ID?: Base mainnet uses chain ID 8453 (0x2105 in hexadecimal). The Base Sepolia testnet uses 84532 (0x14a34).
What is the Base RPC URL?: The official public endpoint is https://mainnet.base.org, and https://sepolia.base.org for the testnet. Several third-party public endpoints also work without an account; heavy or production use wants a dedicated provider.
Which token pays for gas on Base?: ETH. Base has no gas token of its own, so you need a small amount of ETH on Base before you can transact, even if you only intend to move stablecoins.
Is Base EVM compatible?: Yes. Base is an OP Stack rollup and runs the Ethereum Virtual Machine, so Solidity contracts and Ethereum tooling work without modification.
How long does a Base block take?: Base produces a block every 2 seconds, measured by differencing consecutive block timestamps on the chain.

Chain IDs, block time and token addresses on this page were read from Base’s own RPC and verified against a price oracle that returns each contract’s symbol. TopOfBase is not affiliated with Base or Coinbase.