🚀 Big News! Model Context Protocol (MCP) Now Live

- Available on FinFeedAPI & CoinAPI!
backgroundbackground

MEV Bot

An MEV bot is an automated script that reorders blockchain transactions to capture profits from price gaps, slippage, and liquidations.

A MEV bot is an automated program that exploits transaction ordering on blockchains to extract Maximum Extractable Value (MEV)- the profit from strategically placing, reordering, or excluding transactions in a block. Originally termed Miner Extractable Value on Ethereum, MEV has since evolved into a broader concept relevant to validators, searchers, and bots across chains like Ethereum, Solana, and Binance Smart Chain. These bots scan mempools or work with block proposers to execute profitable trades, often faster than any human can react.

These bots scan the mempool, where all unconfirmed transactions wait to be included in a block. They look for patterns—anything that signals a chance to make a quick gain. On Ethereum, many bots use Flashbots, a system that lets them bypass the public mempool and avoid head-to-head competition. On Solana, bots often work with the Jito validator infrastructure, which allows them to bid on the order in which transactions are included.

Mempool scanning is the first step. The bot watches pending transactions and looks for trade volume, slippage, or arbitrage setups. Then comes transaction insertion. If the bot sees an opportunity, it sends a transaction with higher gas fees to jump ahead or follow right behind another trade. Some bots take it even further by influencing which transactions get placed first in the final block.

MEV bots are highly technical and require robust infrastructure, especially on chains like Solana, where execution speed is critical. According to Solana users on Reddit, many MEV bots promoted in Telegram or Discord are scams. These often promise plug-and-play solutions or "free money" but deliver poor or even malicious code. Running a real MEV bot typically involves RPC tuning, mempool parsing, validator relationships, and on-chain monitoring—not a simple script download.

  • MEV is About Ordering Power: MEV bots profit by changing the order of blockchain transactions, typically by front-running, back-running, or sandwiching other users’ trades. This power stems from access to the mempool and control over transaction prioritization.
  • They Exploit Price Inefficiencies: MEV bots rely on inefficiencies across DEXs, lending markets, and liquidation mechanisms. Arbitrage and liquidation sniping are common tactics for capturing value.
  • They Can Harm Regular Users: Sandwich attacks and front-running increase slippage and degrade trade execution for ordinary users. The presence of MEV bots introduces implicit costs for DeFi traders.

Learn More