chain parameter: evm:<EIP-155 id> for EVM chains (canonical ids, nothing invented) and solana. Ordered by trading activity:
The list is also served by
GET /v1/meta/chains (free, 0 credits) with per-chain status, so your integration can sync it programmatically instead of hardcoding it.
We ship new chains regularly. Need one we do not cover yet? Talk to us.