HyperEVM now live on Swap API

Key takeaways

• 0x Swap API now supports HyperEVM, the EVM-compatible layer on Hyperliquid’s L1
• Existing integrators can turn on HyperEVM by updating the chain ID parameter (Chain ID: 999).
• 0x aggregates AMM liquidity across HyperEVM DEX venues, with routing optimized for Hyperliquid's fee model

What is HyperEVM

HyperEVM is an Ethereum-compatible component of the Hyperliquid Layer 1 blockchain, running alongside HyperCore, the native order book engine. HyperEVM allows EVM applications on Hyperliquid to inherit the same finality and security guarantees as the core trading engine, and HYPE is used as the native gas token across both layers.

With a growing ecosystem of DEXes, lending protocols, yield platforms, and trading tools building on HyperEVM, 0x Swap API support enables integrators to tap into Hyperliquid's established userbase with minimal lift.

Why Hyperliquid?

Hyperliquid has an established, trading-focused userbase. Adding HyperEVM through 0x is an easy way to extend your chain coverage and attract new, active traders that want to interact with EVM applications on Hyperliquid.

From an integration perspective, HyperEVM behaves like a standard EVM chain. Solidity tooling works out of the box, so existing features carry over with minimal effort.

How 0x routing works on HyperEVM

0x Swap API aggregates liquidity across AMM venues on HyperEVM, applying the same routing engine used across all supported chains.

On HyperEVM specifically, 0x routing accounts for:

• Gas-aware execution: Hyperliquid's fee model differs from standard EVM chains. 0x Argon Router factors in these dynamics when calculating the best all-in price.
• Multihop routing: Finding efficient paths through intermediate tokens if direct pairs have limited liquidity.
• Multiplexing: Splitting orders across multiple HyperEVM AMMs to reduce slippage on larger trades.

How to enable HyperEVM in Swap API

HyperEVM integrates directly into your existing Swap API workflow. Use the same endpoints and integration logic and updating the chain ID parameter in your query to 999.

What you'll need:

• Your 0x API key from the 0x Dashboard

HyperEVM chain parameters:

• Chain ID: 999
• Native gas token: HYPE
• RPC: https://rpc.hyperliquid.xyz/evm

Example Swap API call:

# Indicative pricing on HyperEVM
curl "<https://api.0x.org/swap/allowance-holder/price?chainId=999&sellToken=SELL_TOKEN_ADDRESS&buyToken=BUY_TOKEN_ADDRESS&sellAmount=10000>" \
  -H "0x-api-key: YOUR_API_KEY" \
  -H "0x-version: v2"

‍For a full walkthrough, see the Swap API getting started guide.

Get started

HyperEVM is live in Swap API. Update your chain ID and ship Hyperliquid support in minutes. No account yet? Sign up for free.

Questions? Reach 0x directly through our contact form.