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Welcome to 0x



0x offers the core building blocks to create the most powerful Web3 apps. Building in Web3 becomes increasingly difficult as the number of ecosystems, DEX protocols, and tokens grow. Our APIs and solutions remove this complexity and reduce the infrastructure overhead.

We offer a fully integrated suite of APIs that help you quickly build, launch, and scale your financial products across 9 supported EVM-compatible chains.

To create an account and get your live API keys, visit the 0x Dashboard.


New to 0x?


Get Started Building

🏁 Getting Started

  • Set up a 0x account and get started building

Explore 0x APIs

🔄 Swap API

  • Easily add crypto trading into your app with a single API. Access 100+ exchanges and thousands of tokens with the Swap API on the most popular networks

⛽ Gasless API

  • Simplify defi with end-to-end gasless transactions. Abstract away the complexities of token approvals and gas with Gasless API.

📖 Orderbook API

  • Add limit orders in your applications with Orderbook API.

    Please note the Orderbook API is not actively supported at this time. We're temporarily not accepting new integrators to post new orders.


Advanced Features

📝 Limit Orders (Advanced Traders)

  • Learn how to fill and manage 0x Limit Orders

🌊 Liquidity Providers

  • Request to add your AMM or RFQ liquidity to the 0x API

Developer Resources

📚 Dev Resources

💻 0x Dashboard

  • Get live API keys, create and manage your apps