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

# API Presets

> Preconfigured routing defaults for LI.FI quote and advanced route endpoints.

API presets provide tuned routing defaults for the LI.FI API. When you pass a preset, LI.FI loads the preset’s defaults and merges any request-specific options on top. Your explicit values always win, so you can start with a preset and selectively override the pieces you care about.

## Supported endpoints

* [`POST /v1/advanced/routes`](/api-reference/advanced/get-a-set-of-routes-for-a-request-that-describes-a-transfer-of-tokens)
* [`GET /v1/quote`](/api-reference/get-a-quote-for-a-token-transfer)

## How presets are applied

1. LI.FI loads the preset defaults.
2. LI.FI merges your request options on top of those defaults.
3. Any conflicting keys fall back to the values you provided in the request body or query string.

This keeps requests concise while preserving full control.

## Processing flow

1. Validate that the requested preset name is present and active.
2. Load the preset configuration (defaults, tool preferences, etc) or use the built-in default if it isn’t available.
3. Merge preset defaults into the request payload or query parameters.
4. Apply user-provided overrides so explicit values win.
5. Log the resolved preset for observability and troubleshooting.

If validation fails, for example because the preset name does not match the required pattern, the API returns HTTP `400`.

## Preset names

Presets can be referenced by:

* **Generic names** such as `stablecoin`
* **Specific names** such as `stablecoin-cheapest`

See all [available presets](/api-reference/presets/overview#available-presets).

A generic name can map to a specific preset. For example, `stablecoin` resolves to `stablecoin-cheapest` by default. LI.FI may promote other presets behind the same generic name when new configurations such as `stablecoin-fastest` or partner-specific variants `stablecoin-partnerX` become available.

## Using the preset parameter

### Advanced Routes

Provide the preset inside the `options` object.

```json theme={"system"}
{
  "fromChainId": 1,
  "toChainId": 137,
  "fromAmount": "1000000000000000000",
  "fromTokenAddress": "0xA0b86a33E6441b8C4C8C0C4C0C4C0C4C0C4C0C4C",
  "toTokenAddress": "0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174",
  "options": {
    "preset": "stablecoin"
  }
}
```

### Quote

Send the preset as a query parameter.

```
GET /v1/quote?fromChain=1&toChain=137&fromToken=0xA0b86a33E6441b8C4C8C0C4C0C4C0C4C0C4C0C4C&toToken=0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174&fromAddress=0x123...&fromAmount=1000000000000000000&preset=stablecoin
```

## Available presets

* [Stablecoin preset](/api-reference/presets/stablecoin)
* Commerce preset (coming soon)

More presets will be documented as they are released.