RFQ Gasless on RAVN: 0x Gasless, Bebop, and CoW
On a swap within one EVM chain, market makers can give you a firm price and pay the gas. RAVN races 0x Gasless, Bebop and CoW for those fills, with Relay as the safety net when they cannot serve the pair.
Quick answer
On a swap within one EVM chain, market makers can give you a firm price and pay the gas. RAVN races three of them:
- 0x Gasless for ERC-20 sells
- Bebop for RFQ
- CoW Protocol for batch auctions and RFQ, native coin sells included
When one wins, you sign a message (SIGNATURE). A solver submits the swap and pays its gas. The price is firm, so it does not slip. Relay stays in the race as the fallback.
Who can sell what
| Venue | Role on one chain | Sells native coin |
|---|---|---|
| 0x Gasless | Gasless ERC-20 to ERC-20 on its chains | No (ERC-20 in, permit style) |
| Bebop | RFQ market maker when it can serve the pair | No (ERC-20 limits apply) |
| CoW | Batch auction and RFQ on CoW chains | Yes, on CoW chains |
| Relay | Fallback for any pair RFQ cannot cover | Yes, where Relay supports the chain |
So a native ETH sell can still be gasless on a CoW chain. Where only Relay covers the chain, you pay normal gas.
Where 0x Gasless runs
We use 0x Gasless only where 0x runs it live: Ethereum, Polygon, Arbitrum, Base, BNB, Optimism, Avalanche, Unichain, World Chain, HyperEVM and Monad. We skip Linea on purpose, since CoW covers it.
Quotes hold for about 30 seconds, so re-quote if you wait.
Where CoW runs
On RAVN, CoW runs on Ethereum, Arbitrum, Base, Polygon, Linea and Avalanche, not BNB or Optimism. There it can sell native coins gasless.
Gasless still has to win
Gasless gets the edge only while it beats the rival's guaranteed floor: the least that rival delivers after its own slippage. Our best execution guide has the math.
What you sign
- SIGRFQ winners. You sign an order message, and RAVN submits it.
- TXRelay fallback. You sign and send a transaction.
Race it yourself
No key, no account. Ask the quote endpoint for a pair and see which venue wins right now. RAVN never holds your funds.
FAQ
Is every RAVN swap gasless?
No. Only RFQ routes on one EVM chain that settle by signature are gasless. Deposit and on-chain routes pay normal network gas, and RAVN adds no gas markup.
Is every RAVN swap zero slippage?
No. Firm RFQ quotes do not slip. On-chain and deposit routes can.
Why did I get Relay instead of 0x?
The chain may not support gasless, 0x may not take the native coin you are selling, or no market maker had liquidity. Or Relay simply gave you more after gas.
Do I need ETH for gas on 0x Gasless?
Not for the swap itself. On a gasless RFQ fill the solver pays that gas and you just sign. Approvals and some tokens can work differently.
