MEV-Share

A Flashbots-developed protocol that lets users share metadata about their transactions with searchers in exchange for a kickback of any MEV the searcher captures. Submitted via a private RPC (Flashbots Protect, MEV Blocker, others), the transaction is routed to searchers who bid for the right to backrun it. Users get structural sandwich-attack protection plus a small kickback of MEV that would otherwise go entirely to the searcher. Live on Ethereum mainnet and several L2s.