0x Documentation
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Contract Addresses
For JavaScript/TypeScript developers, we publish the @0x/contract-addresses package to NPM with all these addresses.

0x v4

Ethereum Mainnet (Chain ID: 1)

Ropsten Testnet (Chain ID: 3)

Binance Smart Chain (Chain ID: 56)

Polygon (Chain ID: 137)

Mumbai (Chain ID: 80001)

Avalanche (Chain ID: 43114)

Fantom (Chain ID: 250)

Celo (Chain ID: 42220)

Optimism (Chain ID: 10)

0x v3

Ethereum Mainnet (Chain ID: 1)

Ropsten Testnet (Chain ID: 3)

Miscellaneous