OpenOcean
Multi-chain DEX aggregator routing swaps across 40+ EVM and non-EVM chains, including Solana.
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OpenOcean key facts
| Category | DEX aggregator |
|---|---|
| Chains | Ethereum, BNB Chain, Base, Arbitrum, Polygon, Solana and 35+ others |
| Platforms | Web, API |
| Custody | Non-custodial |
| Chains | 40+ chains, including Ethereum, BNB Chain, Base, Arbitrum and Solana |
| Security audits | SlowMist (Exchange V2, 2021), PeckShield (routing and swap contracts, 2021) |
| Fees | Public Swap API: 0.01% (stable) to 0.5% (exotic) tiered fee, plus gas |
What is OpenOcean?
OpenOcean is a DEX aggregator that routes swaps across 1,000+ liquidity sources on 40+ chains, including Solana. It is non-custodial: users sign every transaction. Its docs report no security incident and list 2021 audits by SlowMist and PeckShield.
How OpenOcean works
OpenOcean runs a four-step pipeline.
It pulls prices from over 1,000 liquidity sources, including AMMs, prop AMMs, RFQ market makers, staking vaults and launchpad bonding curves. It then computes a route that weighs price, gas cost and slippage, returns a quote with the expected output and transaction calldata, and hands the transaction to you to sign. The swap executes atomically on-chain with slippage protection, so it either fills within your limit or reverts.
Large orders can be split across several DEXs, and when a direct pair is thin the router hops through intermediate tokens. Gas is counted in the route choice, so the quote reflects output after network costs. Apart from market swaps, the same engine powers gasless, limit order and DCA APIs; the chain table marks gasless as available on chains such as BNB Chain, Base, Arbitrum and Polygon but not on Ethereum mainnet.
How to start with OpenOcean
- Traders use the web app with a connected wallet; OpenOcean never holds funds, and swaps go from your wallet to the destination address.
- Developers can call the public Swap API at a default limit of 2 requests per second, or ask for a two-week free trial under 10 requests per second.
- Solana routing through the API is limited to whitelisted users with an authorized API key, requested through a form.
- Integrators can add their own fee with the referrerFee parameter.
OpenOcean fees and limits
- The public Swap API charges a flat tiered fee by token category: 0.01% for stable to stable pairs such as USDC and USDT, 0.1% for correlated pairs such as ETH and stETH, 0.25% for the top 200 tokens by market cap, and 0.5% for exotic tokens.
- In mixed pairs the fee table applies the more exotic category, so a stablecoin to exotic token swap pays 0.5%.
Network gas comes on top. OpenOcean's own overview page says 0 protocol fees, so check the fee in your quote.
Risks to know before using OpenOcean
- The only audits OpenOcean lists are from 2021: SlowMist on the Exchange V2 contract and PeckShield on the core routing and swap contracts.
- The page lists no later reports.
- The docs report zero security incidents and say the contracts are open source on GitHub.
- You still grant token allowances to the swap contract before trading, so review and revoke approvals you no longer use.
OpenOcean alternatives
Other projects people compare with OpenOcean.
DEX aggregator and set of DeFi protocols that routes swaps across many exchanges on 19 networks.
DEX aggregator routing swaps across 420+ liquidity sources on 20 EVM chains, with cross-chain swaps.
Intent-based DEX aggregator on CoW Protocol that settles orders in batches through competing solvers.
DEX aggregator and intents protocol, formerly ParaSwap, routing swaps across 10 EVM chains.
DEX aggregator app built by 0x Labs, with swaps on Ethereum, Solana and 11 other chains.
Solana DEX aggregator that also offers perps, lending, limit orders and DCA.
Where OpenOcean ranks on DappAtlas
OpenOcean pros and cons
- 40+ chains, including non-EVM Solana
- Docs report no security incident since launch
- Swap, gasless, DCA and limit order APIs
- Audits listed date from 2021
- Public Swap API charges 0.01% to 0.5% by token tier
- Feature availability varies by chain and API
OpenOcean FAQ
What is OpenOcean?
OpenOcean is a DEX aggregator that routes swaps across 1,000+ liquidity sources on 40+ chains, including Solana. It is non-custodial: users sign every transaction. Its docs report no security incident and list 2021 audits by SlowMist and PeckShield.
Which chains does OpenOcean support?
Ethereum, BNB Chain, Base, Arbitrum, Polygon, Solana and 35+ others.
How much does OpenOcean cost?
Public Swap API: 0.01% (stable) to 0.5% (exotic) tiered fee, plus gas, according to OpenOcean’s own page (checked Sep 26, 2026).
Does OpenOcean hold my funds?
No. OpenOcean is non-custodial: you keep your funds in your own wallet and sign each transaction.
Sources
How this page works
Sources: OpenOcean: official site, OpenOcean: Supported chains, OpenOcean: Security. Data as of Sep 26, 2026.
Not affiliated with any project listed. Educational content, not financial advice.