Supported chains - Tern

Chain	Name in the API	Chain ID	Native token
Base	`base`	`8453`	ETH
Arbitrum	`arbitrum`	`42161`	ETH
Ethereum	`ethereum`	`1`	ETH
BNB Chain	`bsc`	`56`	BNB
Starknet	`starknet`	`0x534e5f4d41494e`	None: ETH and STRK are regular tokens

Same-chain swaps work on every chain above.
Cross-chain swaps work between any two of them, wherever a solver offers a price for the pair. If none does, the API answers 422 no_route.
Private swaps are available on Starknet.

The contracts on each chain are listed in Contract addresses.

The live list

Tern adds chains over time. GET /v1/chains always returns what’s available right now, so use it rather than hard-coding this page.

anyAsset: true means any token with enough DEX liquidity on that chain can be swapped.
assets lists tokens that solvers support by name, with their symbol, decimals, and logo.

Each token also has a verified flag: true when CoinGecko lists the token at that address. Anyone can create a token with a familiar name, so show a warning next to unverified tokens.

Writing chains, tokens, and amounts

What	How to write it
Chain	Its name in the API, in lowercase: `base`, `starknet`.
EVM address	`0x` followed by 40 hex characters. The API returns addresses in lowercase.
Starknet address	`0x` followed by up to 64 hex characters.
Token	Its contract address, or `native` for an EVM chain’s native token.
Amount	A whole number in the token’s smallest unit, as a string. 1 USDC is `"1000000"`; 1 ETH is `"1000000000000000000"`. Never a decimal.
Transaction hash	`0x` followed by 64 hex characters on EVM chains, or up to 64 on Starknet.

A token’s decimals are in assets from GET /v1/chains, or in the token contract itself.