API Pricing & Access
OpenOcean offers flexible API access designed for both individual developers and professional partners. Whether you're building a DeFi app, wallet, or trading bot, our API provides reliable connectivity, competitive swap rates, and adaptable fee options.
Free Trial
A 2-week free trial (under 10 RPS) is available for all builders. Please contact our BD team in the API group or submit a form.
Public Swap API
The public Swap API is available for all DeFi builders. It includes a default rate limit of 2 RPS and applies a standard dynamic fee model. Developers or projects can also monetize their own fees by using the referrerFee parameter to share in swap revenue.
Pro Swap API
For protocol developers, arbitrage traders, and market makers who require higher rate limits or customized fee arrangements, please contact our team via the API group, submit an enquiry form, or serve yourself through the developer portal. A 2-week free trial (under 10 RPS) is available for all builders.
Fee Structure
OpenOcean charges a flat tiered trading fee for using the public Swap API. Tokens are grouped into four categories, including Stable, Correlated, Common and Exotic. Please refer to the fee rates below.
| Fee Category | Fee Rate | Note |
|---|---|---|
| Stable | 0.01% | Stable <> Stable, such as USDC <> USDT. |
| Correlated | 0.1% | Stable <> Correlated; Correlated <> Correlated, such as ETH, stETH, etc. Trading pair examples: USDC<>ETH; ETH<>stETH. |
| Common | 0.25% | Top 200 tokens by market cap identified from Coingecko excluding Stable & Correlated. Trading pairs include Stable <> Common; Correlated <> Common; Common <> Common. |
| Exotic | 0.5% | Stable <> Exotic; Correlated <> Exotic; Common <> Exotic; Exotic <> Exotic. |
- If the input and output tokens belong to the same category, the fee will be charged in the output token.
- If the input and output tokens belong to different categories, the fee will be charged based on the higher-priority category, following this order: Stable > Correlated > Common > Exotic.
- For more details, please look up at our Tiered-Fee Token List.