API cheatsheet

Networks API URLs

Each blockchain network is associated with a dedicated url of our marketplace API. The API is documented in its reference documentation.

  • Polygon: https://api.marketplace..cometh.io/v1

  • Polygon Mumbai: https://api.mumbai-marketplace.cometh.io/v1

  • Muster: https://api.muster-marketplace.cometh.io/v1

Networks that can be easily supported if requested:

  • Ethereum (Mainnet)

  • Ethereum (Goerli)

  • Binance Smart Chain

  • Optimism

  • Fantom

  • Celo

  • Avalanche

  • Arbitrum

  • Base

Our marketplace API is compatible with all EVM networks where 0x is deployed. If you need a precise network don't hesitate to contact us.


Our @cometh/marketplace-sdk is available to use the API and documented in its reference documentation.

When using the SDK, available API endpoints are accessible through entity-grouped services available in the SDK instance:

0x Contract

Each network has a set of 0x contracts that implement the entire protocol. Core functions are all on a main exchange proxy contract. To know the address of the 0x proxy contract on your network please check the 0x cheat sheet.

For the Cometh Muster network, the address is 0x9a6204dE86443eB0914059b291f667D8953e8aE1.

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