mevblocker.io

What It Is

MEV Blocker is not an exchange, wallet, or custodial platform, but an MEV-protection RPC for Ethereum Mainnet. Users can add https://rpc.mevblocker.io to their wallet to get automatic protection against front-running and sandwich attacks when sending Ethereum transactions. According to the site, it has protected more than $219 billion in transaction volume, over 62 million transactions, and returned more than 5,500 ETH to users.

Core Features and Supported Scope

Its core mechanism is to route user transactions to a network of searchers and builders, using order-flow auctions to identify backrunning opportunities while restricting searchers from front-running or sandwiching users. The text explicitly states that all features support Ethereum, but does not disclose support for other chains, token trading pairs, derivatives, or leverage. It is better suited to on-chain swaps, liquidity provision, NFT minting, and similar use cases, rather than buying crypto, order matching, or asset custody.

Pricing, Rebates, and Endpoint Options

MEV Blocker is free for users. If a transaction creates a backrunning opportunity, searchers bid for the right to backrun it, and the user can receive 90% of the profit as a rebate. The rebate is paid in the same block to the wallet address that initiated the transaction. It offers endpoints such as /fast, /noreverts, /fullprivacy, /maxbackruns, and /nochecks, with different trade-offs between front-running protection, backrun rebates, transaction revert protection, and privacy strength. For example, /fullprivacy provides maximum protection but no rebates.

Pros and Cons

Its advantages are that it is free, permissionless, and easy to integrate, while offering a direct solution to the most common MEV-loss scenarios faced by Ethereum users. It also emphasizes data transparency, with public data released after a 30-second delay. The drawbacks are that the text only confirms Ethereum support, so ecosystem coverage is limited; no single endpoint provides the highest level of privacy, rebates, and revert protection at the same time; and it does not disclose information about KYC, licensing, insurance, or customer support.

Who It Is For and Access from China

It is suitable for users who frequently use Ethereum DeFi, NFT minting, on-chain swaps, and liquidity operations. It is also suitable for wallets and trading applications to integrate as a default RPC. The text does not disclose accessibility from mainland China, so this is assessed as unknown. If it is unavailable, alternatives include wallet-native MEV protection, Flashbots Protect, or other private transaction RPCs.