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FAST RPC is a drop-in replacement for standard Ethereum RPC endpoints that enables preconfirmations. It works like a normal Ethereum node — you send transactions via eth_sendRawTransaction and check receipts via eth_getTransactionReceipt — but under the hood it coordinates with mev-commit’s decentralized network of block builders to preconfirm your transactions.

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How It Works

  1. You configure your wallet or dapp to point at https://fastrpc.mev-commit.xyz instead of a standard RPC like Infura or Alchemy.
  2. When you send a transaction, the RPC encrypts it and sends bids to block builders in the mev-commit network.
  3. Once all registered builders issue a commitment and the next block proposer is opted in, the transaction is preconfirmed.
  4. eth_getTransactionReceipt returns a receipt immediately — no waiting 12+ seconds for the next block.

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Who Is It For?

  • Wallets — Add the RPC as a custom network and get instant transaction confirmation UX. No deposit needed during the promotional period — gas is fully sponsored.
  • dApps — Integrate preconfirmations with minimal code changes. Deposit ETH into a gas tank, then use standard RPC methods as usual.
  • Developers — Access additional methods like mevcommit_getTransactionCommitments and mevcommit_optedInBlock for advanced preconfirmation logic.

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Key Benefits

  • Sub-second confirmation UX — Transactions are preconfirmed in ~100-200ms, compared to 12+ seconds on standard Ethereum.
  • Drop-in compatibility — Works with existing wallets and tools. No protocol changes or special SDKs required.
  • Gasless for wallets — During the promotional period, the RPC sponsors transaction fees for wallet users.
  • mev redistribution — Value captured through preconfirmations flows back to users and validators, not extractors.

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Learn More

FAST RPC Setup Guide

Step-by-step instructions for wallets and dapps.

FAST RPC API Reference

Full documentation of all supported RPC methods.

What is Fast Protocol?

How FAST RPC fits into the broader Fast Protocol ecosystem.

What are Fast Swaps?

The consumer-facing product built on FAST RPC.