Gasless API

The OpenOcean Gasless API empowers developers to build the most seamless and intuitive trading experience in Web3 by abstracting away the complexity of approvals, gas fees, and swap execution.

With just one API integration, your users can sign a single message and perform a complete token swap in faster settlement.

Whether you're building a wallet, DeFi app, or onboarding portal, the Gasless API helps you eliminate friction and increase confirmation speed.

Key Benefits

🔋 Swap without native tokens or gas

Let users trade without holding the chain’s native gas token (like ETH, BNB). Gas fees are abstracted and handled by OpenOcean - so users can swap with only the token they want to.

🔁 Seamless swaps

Secured by Uniswap’s Permit2 standards, the entire flow enables secure token approvals without extra on-chain transactions. User just sign and swap to reduces transaction failure risk.

⚡ Best execution with OpenOcean aggregation

Behind the scenes, every gasless swap leverages OpenOcean’s powerful aggregation mechanism, routing trades across multiple liquidity sources for optimal price and fill.

Try It Out

Want to experience it first? Test Ultra Mode gasless swaps on our frontend: 👉 app.openocean.finance/swap/base

Check the integration guide to get started ⬇

API