How to Use MEV Protection
MEV (Maximal Extractable Value) lets sophisticated actors profit from your transactions through front-running, sandwich attacks, and arbitrage. Protection tools help you avoid these losses.
Types of MEV Attacks
Sandwich Attack:- Bot sees your buy order
- Bot buys before you (front-run)
- Your order executes at higher price
- Bot sells after you (back-run)
Bots copy your profitable transaction and execute it first with higher gas.
MEV Protection Options
| Tool | Method | Cost |
|---|---|---|
| . . . | . . . . | . . . |
| Flashbots Protect | Private mempool | Free |
| MEV Blocker | OFA auction | Free |
| Cowswap | Batch auction | Free |
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Step-by-Step Instructions
Understand Your Risk
MEV impacts large swaps most. Trades under $1k rarely attract MEV attention.
Tips
- ✓Larger trades = more MEV risk
- ✓Popular tokens targeted more
- ✓Low liquidity pools more vulnerable
Add Flashbots Protect RPC
Add Flashbots RPC to MetaMask: Settings → Networks → Add Network.
Tips
- ✓RPC URL: rpc.flashbots.net
- ✓Same chain ID as Ethereum (1)
- ✓Free to use
Switch to Protected Network
When making large swaps, switch to Flashbots network in MetaMask.
Tips
- ✓Transactions go to private mempool
- ✓Not visible to MEV bots
- ✓Switch back after
Use MEV-Protected DEXs
Cowswap and 1inch Fusion have built-in MEV protection.
Tips
- ✓Cowswap batches orders
- ✓1inch Fusion uses resolvers
- ✓No RPC change needed
Set Appropriate Slippage
Lower slippage reduces MEV opportunity but may cause failed transactions.
Tips
- ✓0.5% for stable pairs
- ✓1-3% for volatile pairs
- ✓Do not set unnecessarily high
Consider Transaction Timing
MEV is most active during high-volume periods. Off-peak may have less MEV.
Tips
- ✓Less competition = less MEV
- ✓Not guaranteed protection
Verify Protection
Check that transactions are going through protected routes.
Tips
- ✓Flashbots explorer shows private txs
- ✓Compare execution vs quote