> ## Documentation Index
> Fetch the complete documentation index at: https://docs.primev.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# What is FAST RPC?

> A drop-in Ethereum RPC that enables preconfirmations for any wallet or dapp.

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.

## 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.

## 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.

## 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.

***

## Learn More

<CardGroup cols={2}>
  <Card title="FAST RPC Setup Guide" icon="book-open" href="/v1.2.x/get-started/fastrpc">
    Step-by-step instructions for wallets and dapps.
  </Card>

  <Card title="FAST RPC API Reference" icon="code" href="/v1.2.x/developers/fast-rpc-api">
    Full documentation of all supported RPC methods.
  </Card>

  <Card title="What is Fast Protocol?" icon="circle-question" href="/v1.2.x/knowledge-base/what-is-fast-protocol">
    How FAST RPC fits into the broader Fast Protocol ecosystem.
  </Card>

  <Card title="What are Fast Swaps?" icon="circle-question" href="/v1.2.x/knowledge-base/what-are-fast-swaps">
    The consumer-facing product built on FAST RPC.
  </Card>
</CardGroup>