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

# Lighthouse in Advanced Mode

> How to run Lighthouse API in advanced mode

Geekflare Lighthouse API can accept the following parameters.

* `--screenEmulation`
* `--screenEmulation.disabled`
* `--emulatedUserAgent`
* `--only-audits`
* `--only-categories`
* `--throttling-method`
* `--extra-headers`
* `--chrome-flags`
* `--no-emulatedUserAgent`
* `--blocked-url-patterns`
* `--output`
* `--preset`

In order to use these parameters, pass them in a `parameters` JSON array in the request body payload.

Let's explore some of the examples.

**Run only SEO audit**

```json theme={null}
{
    "url": "https://example.com/",
    "parameters": [
      "--only-categories=seo"
  ]
}
```

**Save output in HTML format**

```json theme={null}
{
    "url": "https://example.com/",
    "parameters": [
      "--output=html"
  ]
}
```

**Run a single audit**

```json theme={null}
{
    "url": "https://example.com/",
    "parameters": [
      "--only-audits=image-alt"
  ]
}
```

**Run Lighthouse using Proxy**

```json theme={null}
{
    "url": "https://example.com/",
    "proxyCountry": "fr",
    "parameters": [
      "--only-categories=seo"
  ]
}
```

**Disable Mobile Emulation and Throttling**

```json theme={null}
{
    "url": "https://example.com/",
    "device": "desktop",
    "parameters": [
      "--output=html",     
      "--screenEmulation.disabled",      
      "--no-emulatedUserAgent",     
      "--throttling-method=provided"
  ]
}
```

**You can also use multiple parameters**

```json theme={null}
{
    "url": "https://example.com/",
    "parameters": [
      "--only-categories=seo",
      "--output=html"
  ]
}
```