# `corsProxyUrl`

The `corsProxyUrl` option allows using a custom CORS proxy server.

## Options

| Option | Type | Description |
|  --- | --- | --- |
| corsProxyUrl | string | The value can be the Redocly CORS proxy URL (https://cors.redoc.ly) or the URL of a custom CORS proxy server. |


## Examples

Modify the value of the corsProxyUrl option in the Redocly configuration file.


```yaml redocly.yaml
openapi:
  corsProxyUrl: https://cors.redoc.ly
```

## Resources

- **[OpenAPI configuration](/docs/realm/config/openapi)** - Complete guide to OpenAPI configuration options for customizing API reference documentation
- **[OpenAPI Specification](https://spec.openapis.org/oas/latest.html)** - Official OpenAPI Specification documentation for understanding API description standards
- **[OpenAPI visual reference](https://redocly.com/learn/openapi/openapi-visual-reference)** - Visual guide to OpenAPI specification structure and CORS proxy configuration
- **[Configuration options](/docs/realm/config)** - Explore other project configuration options for comprehensive documentation customization