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

# Hyperliquid API Overview

> Low-latency Hyperliquid data infrastructure on Uniblock — the Info API, HyperCore WebSockets, and HyperEVM JSON-RPC, all behind one API key.

Uniblock gives you complete, low-latency data infrastructure for **Hyperliquid** behind a single API key and billing account. Whether you're building a trading UI, a copy-trade bot, a portfolio tracker, or an on-chain dashboard, you connect to Uniblock instead of stitching together Hyperliquid's public `/info` endpoint, its HyperCore WebSocket, and a HyperEVM node yourself — with automatic provider failover, unified authentication, and no public-API per-IP caps to work around.

<Info>
  Every request is authenticated with a project API key. Create your project and
  grab your key from the [Uniblock dashboard](https://dashboard.uniblock.dev).
  New to Hyperliquid's architecture? Start with
  [HyperCore vs. HyperEVM](/guides/quickstart-guides/hypercore-vs-hyperevm).
</Info>

## What you can build

<CardGroup cols={3}>
  <Card title="Hyperliquid Info API" icon="database" href="/guides/hyperliquid/info-api/overview">
    A drop-in replacement for Hyperliquid's public `/info` REST API. Same request and response shapes, routed through Uniblock's provider waterfall — no per-IP request-weight cap, automatic failover.
  </Card>

  <Card title="Hyperliquid WebSockets" icon="bolt" href="/guides/hyperliquid/websockets/overview">
    Real-time HyperCore order book and account streams — `l2Book`, `l2BookDiff`, `l4Book`, fills, and liquidations — over one connection, with no per-IP subscription cap.
  </Card>

  <Card title="Hyperliquid EVM" icon="server" href="/guides/hyperliquid/evm/overview">
    Standard JSON-RPC access to HyperEVM (chain `999`, testnet `998`) — read state, send transactions, and call contracts with familiar EVM tooling.
  </Card>
</CardGroup>

## Why route Hyperliquid through Uniblock

* **No per-IP caps.** The public `/info` API caps you at a request-weight budget per IP, and the public WebSocket caps you at 1000 subscriptions per IP. Uniblock lifts both — plan-level rate limits still apply (a `429` on burst; [details](/guides/uniblock/error-codes#rate-limits)).
* **One key, one bill.** Info API, WebSockets, and HyperEVM share the same project API key and are metered in compute units.
* **Automatic failover.** Requests flow through the unified provider waterfall (Alchemy, Dwellir, Chainstack, GoldRush/Covalent), so a single provider outage doesn't take you down.
* **Drop-in migration.** Request and response shapes match Hyperliquid's own contracts, so migrating usually means changing one URL and adding a header.

## The two halves of Hyperliquid

Hyperliquid is two components with different jobs, and which offering you use depends on which half you need:

|                                  | HyperCore                                                                                                          | HyperEVM                                              |
| -------------------------------- | ------------------------------------------------------------------------------------------------------------------ | ----------------------------------------------------- |
| **What it is**                   | Native trading engine — order book, perps, spot                                                                    | EVM-compatible smart contract chain                   |
| **How you reach it on Uniblock** | [Info API](/guides/hyperliquid/info-api/overview) (REST) and [WebSockets](/guides/hyperliquid/websockets/overview) | [HyperEVM JSON-RPC](/guides/hyperliquid/evm/overview) |
| **Node access**                  | Controlled by Hyperliquid — you can't run one                                                                      | Permissionless                                        |

See [HyperCore vs. HyperEVM](/guides/quickstart-guides/hypercore-vs-hyperevm) for the full breakdown.

## Get started

<Card title="Hyperliquid Quickstart" icon="rocket" href="/guides/hyperliquid/quickstart">
  Three \~5-minute paths: call the Info API, connect a WebSocket, and query HyperEVM over JSON-RPC.
</Card>