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Wherever a chain_id is required — in CLI commands, API requests, or policy rules — use the Cobo chain ID from the table below, not the public chain name.

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Mainnet

Cobo chain IDChain name
ARBITRUM_ETHArbitrum
AVAXCAvalanche C-Chain
BASE_ETHBase
BSC_BNBBNB Chain
ETHEthereum
MATICPolygon
OPT_ETHOptimism
SOLSolana
TEMPO_TEMPOTempo

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Testnet

Cobo chain IDChain name
SETHEthereum Sepolia
TBASE_SETHBase Sepolia
SOLDEV_SOLSolana Devnet
TTEMPO_TEMPOTempo Testnet
To retrieve this list programmatically: 
caw meta chains
Or via the API: List chains.