MEVBot
The bots behind
the blocks.

Latest / Understand MEV / Economy / Build / Contact

MEV explained. Stories, strategies and tools from the world of onchain automation.An independent, curated hub for understanding the bots behind the blocks.

Conceptual blockspace sculpture with an amber transaction path through graphite and glass layers

01 / Latest MEV

The conversations moving blockspace forward.Selected X posts, first-hand accounts and essential context — curated by MEVBot.

02 / Understand MEV

An MEV bot is software that searches for opportunities created by transaction ordering and changing onchain prices. MEV means maximal extractable value.The opportunity
A price difference, a liquidation or a transaction that changes market conditions.The competition
Searchers simulate strategies and compete for execution. Builders assemble blocks; validators propose them.The trade-off
Arbitrage can align prices. Sandwich attacks can worsen a trader’s execution. The strategy and its effect on users matter.Read the Ethereum MEV primer →

How MEV works

INSIDE THE BLOCK / CHOOSE A STRATEGY

Same asset. Different prices.

A searcher spots a price gap between venues and attempts to capture it before someone else does.

01 / OBSERVEFind a gapCompare prices across liquidity pools.
02 / SIMULATEBuy → SellCheck the route, fees and expected outcome.
03 / EXECUTEClose the loopSuccessful execution captures the difference.
Market effect: arbitrage can bring prices closer across venues. Competition, fees and execution risk determine the outcome.

Debt meets its threshold.

A searcher watches lending positions and acts when a protocol allows an undercollateralized position to be liquidated.

01 / MONITORHealth fallsCollateral no longer meets the required threshold.
02 / REPAYDebt is coveredA liquidator repays eligible debt under protocol rules.
03 / RECEIVECollateral movesThe liquidator receives collateral with an incentive.
Protocol effect: liquidations help manage lending risk. Borrowers lose collateral, and the details depend on each protocol.

The trade around your trade.

An attacker places transactions on either side of a user's swap to exploit its price impact.

01 / BEFOREAttacker buysThe first transaction shifts the pool price.
02 / BETWEENUser swapsThe user's transaction executes at a worse price.
03 / AFTERAttacker sellsThe attacker attempts to capture the difference.
User effect: worse execution. Private transaction submission and careful slippage settings can reduce exposure, with their own trade-offs.
ILLUSTRATIVE SEQUENCES · NO LIVE DATA · Read the Ethereum primer ↗

Explore arbitrage, liquidations and sandwich attacks, step by step. Educational illustrations, not live transactions.Flashbots research → / Essays & analysis →

03 / The MEV Economy

Estimated annual Ethereum MEV extraction: $1.8 billion in 2024, $2.2 billion in 2025, $2.5 billion for full-year 2026. Source: Shattered.io. Directional estimates.

2024 · $1.8B / 2025 · $2.2B / 2026 · ~$2.5BDirectional estimates of annual Ethereum MEV extraction. No single dashboard captures every form of MEV; 2026 is a full-year estimate.Source: Shattered.io →

04 / How to build a MEV bot?

01 / START

Searcher Quick Start

Learn bundles, signing and relay submission with Flashbots.

02 / BUILD

Build a limit-order bot

Follow the practical MEV-Share tutorial, step by step.

03 / EXPLORE

Simple arbitrage bot

Study an open-source searcher built for learning.

05 / Contact

Have a story to share, a question about MEV or a project in mind? Get in touch about research, editorial contributions and partnerships.

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