Nanoreth is an open-source Hyperliquid archive node built on Paradigm's reth client. It is maintained by the hl-archive-node GitHub organisation, mainly by developer sprites0.

It backfills HyperEVM blocks from Hyperliquid's S3 bucket and serves a full JSON-RPC with historical state, which Hyperliquid's default RPC does not support. HyperCore deposit (system) transactions are recorded as pseudo-transactions to help explorers and indexers. Hyperliquid's docs point builders to Nanoreth for archive nodes, and providers such as Chainstack expose a /nanoreth endpoint.