# Azul

> The fastest, most reliable RPC for Base transaction submission. Parallel race-to-land submission, sandwich-resistant by design, no logs, no API key required.

Azul is a private public RPC for Base mainnet (chainId 8453).
Endpoint: https://rpc.baseazul.dev. No API key required for public traffic.

## Docs

- [Full reference (markdown)](https://baseazul.dev/llms-full.txt): The entire RPC reference in one machine-readable file.
- [Method support](https://baseazul.dev/docs#methods): Which JSON-RPC namespaces are exposed on the public path.
- [Rate limits](https://baseazul.dev/docs#rate-limits): Per-IP caps for anonymous traffic; API-key bypass.
- [Architecture](https://baseazul.dev/docs#read-write-split): Read/write split, sequencer propagation, upstream pool.
- [Sandwich resistance](https://baseazul.dev/docs#sandwich): How race-to-land submission and the private lane reduce front-running exposure.
- [Error codes](https://baseazul.dev/docs#errors): JSON-RPC and HTTP-level error reference.

## Guides

- [Add a fallback](https://baseazul.dev/docs#fallback): Pair Azul with a paid provider for production traffic.
- [Subscribe to new blocks](https://baseazul.dev/docs#subscribe): Use the WS endpoint instead of polling.
- [Page through eth_getLogs](https://baseazul.dev/docs#logs-paging): Chunk wide ranges and parallelize.

## Optional

- [Live status](https://baseazul.dev/status): Operational metrics — latency, block age, uptime.
- [Privacy](https://baseazul.dev/privacy): What we don't log; threat model.
- [For users](https://baseazul.dev/users): How to switch your wallet's RPC URL.
- [For developers](https://baseazul.dev/developers): Drop-in code samples.