> For the complete documentation index, see [llms.txt](https://docs.liqd.ag/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.liqd.ag/liquidswap-integration/overview.md).

# Overview

LiquidSwap is a multichain aggregator. It finds optimal swap routes across liquidity on supported chains, with built-in multi-hop routing, revenue sharing, and native token unwrapping.

## Supported chains

| Chain           | `chainId` |
| --------------- | --------- |
| HyperEVM        | `999`     |
| Robinhood Chain | `4663`    |

Pass `chainId` on [route](/liquidswap-integration/route-finding.md), [tokens](/liquidswap-integration/token-list.md), [token balances](/liquidswap-integration/token-balances.md), [liquidity sources](/liquidswap-integration/dexes.md), and [pools](/liquidswap-integration/find-pools.md) requests.

## Quick start

1. **Get a route** — call `GET https://api.liqd.ag/v2/route` with `tokenIn`, `tokenOut`, `amountIn`, and `chainId`.
2. **Execute** — send the returned `calldata` to the contract address in `execution.to`.

```javascript
const route = await fetch(
  'https://api.liqd.ag/v2/route?tokenIn=0x555...&tokenOut=0xB8C...&amountIn=100&chainId=999'
).then(r => r.json());

const tx = await signer.sendTransaction({
  to: route.execution.to,
  data: route.execution.calldata,
});
```

That's it. No API keys, no registration, no rate limits.

## Key features

* **No authentication** — start calling endpoints immediately
* **No rate limits** — scale without worrying about quotas or throttling
* **Multichain** — same API across HyperEVM and Robinhood Chain via `chainId`
* **Multi-hop routing** — set `multiHop=true` to route through intermediate tokens
* **Exact input or output** — provide `amountIn` for exact input swaps, or `amountOut` for exact output
* **Native unwrapping** — set `unwrapNative=true` to receive native HYPE (HyperEVM) or ETH (Robinhood Chain) instead of the wrapped token

## Revenue sharing

LiquidSwap charges no forced fees for API usage. You choose your own fee structure:

* **Custom fees** — set `feeBps` (up to 100 = 1%) and `feeRecipient` on route requests. You keep 97.5% of collected fees; 2.5% goes to protocol.
* **Positive slippage** — when swaps execute better than quoted, 50% of positive slippage is captured. If `feeRecipient` is set, half goes to you and half to protocol. Set `feeBps=0` with a `feeRecipient` to earn positive slippage without charging users.
* **Zero-fee option** — omit `feeBps` and `feeRecipient` to operate completely fee-free.

## API endpoints

| Endpoint                                                                     | Description                                                 |
| ---------------------------------------------------------------------------- | ----------------------------------------------------------- |
| [`GET /v2/route?chainId=`](/liquidswap-integration/route-finding.md)         | Find optimal swap routes with ready-to-use calldata         |
| [`GET /dexes?chainId=`](/liquidswap-integration/dexes.md)                    | List liquidity sources and `routerIndex` values for a chain |
| [`GET /pools?chainId=`](/liquidswap-integration/find-pools.md)               | Discover pools for a token pair                             |
| [`GET /tokens?chainId=`](/liquidswap-integration/token-list.md)              | List tracked tokens with metadata                           |
| [`GET /tokens/balances?chainId=`](/liquidswap-integration/token-balances.md) | Get token balances for a wallet                             |

Base URL: `https://api.liqd.ag`

## Contracts

| Chain                    | RouterV2                                     |
| ------------------------ | -------------------------------------------- |
| HyperEVM (`999`)         | `0x744489ee3d540777a66f2cf297479745e0852f7a` |
| Robinhood Chain (`4663`) | `0xfc020bBCe0365f56bbBb78Ce504cE2a2b24E0ae6` |

Always prefer the `execution.to` address from the route response. See [Execution](/liquidswap-integration/execution.md) for full details.


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