chainslist shows chain IDs and RPC endpoints to configure EVM wallets. It is a directory of EVM networks, the blockchains compatible with Ethereum-style wallets and smart contracts. A chain ID identifies the network when signing transactions; an RPC endpoint lets your wallet read balances and broadcast transactions.
The directory gives you the two details needed to identify and reach an EVM network: its chain ID and an RPC endpoint. Ethereum mainnet has chain ID 1, while Arbitrum One has chain ID 42161. An RPC endpoint is a node address that handles requests for balances, fees and transactions; a network can have several endpoints. Manual wallet setup may also ask for a network name and native currency symbol.
First identify the network named by the app you want to use or the chain holding your assets. An EVM chain list helps you compare IDs and RPCs; use chainslist to find the chosen network’s details and add it to MetaMask or another compatible wallet in one click. If you prefer manual setup, enter the network details in your wallet’s custom-network settings.
Adding a network saves its connection settings in your wallet; it does not transfer funds. In a one-click flow, the directory passes the selected network’s settings to the wallet for you to review and approve. In a manual flow, you enter the fields yourself and then select the network.
After the switch, your wallet asks the RPC for data on that chain and uses your existing account to sign transactions. Your address can look the same on Ethereum and Arbitrum One while showing different balances, because each chain keeps its own ledger. If your tokens are on Arbitrum One, selecting Ethereum will not move them there.
Adding a network requires no on-chain transaction, so it has no gas fee. Sending assets afterward does: for a simple ETH transfer on Ethereum, say 21,000 gas at 2 gwei per gas gives 42,000 gwei, or 0.000042 ETH. You can multiply that amount by the ETH price for a rough fiat estimate; contract calls use more gas, and gas prices change.
The chain ID must match the chain you intend to use, and the RPC must respond reliably. If a saved RPC stops working, another endpoint for the same chain may restore access; changing the chain ID instead selects a different ledger. When entering details manually, check the chain ID and RPC against the network’s official information.
The chain list helps you connect to a network; it does not bridge assets between chains. Public RPC endpoints may slow down or limit requests, and their operators can see the addresses and queries your wallet sends. If you choose a different RPC provider, keep the chain ID matched to your intended network.