# HTTP resource not retrievable. The HTTP status from the remote server was: 405

> Canonical HTML version: https://rocketvalidator.com/html-validation/http-resource-not-retrievable-the-http-status-from-the-remote-server-was-405
> Attribution: Rocket Validator (https://rocketvalidator.com)
> License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

A `405 Method Not Allowed` status means the server hosting the linked resource rejected the validator's request, typically because it doesn't allow the HTTP `HEAD` or `GET` method the validator uses to check the URL.

This is **not an error in your HTML code**. It's a server-side issue with the remote resource you're referencing. The W3C validator tries to fetch external resources (stylesheets, scripts, images, etc.) to verify they exist and are valid. When a remote server blocks those requests, the validator reports this warning.

Common causes include:

- The remote server has strict firewall or bot-protection rules that block requests from the validator.
- The server requires authentication or specific headers to serve the resource.
- The URL points to an API endpoint or resource that only accepts `POST` requests.

You can safely **ignore this warning** if the resource loads correctly in a browser. However, if you want to resolve it, consider these options:

- **Host the resource yourself** instead of relying on the remote server.
- **Verify the URL is correct** — make sure it points to a publicly accessible file.
- If it's your own server, ensure it responds to `HEAD` and `GET` requests for that resource.

## HTML Example

A typical case where this happens:

```html
<!-- A remote stylesheet hosted on a server that blocks validator requests -->
<link rel="stylesheet" href="https://example.com/restricted/styles.css">
```

### Fix: Host the Resource Locally

```html
<!-- Download the file and serve it from your own domain -->
<link rel="stylesheet" href="/css/styles.css">
```

Self-hosting the resource eliminates the dependency on the remote server and ensures the validator can access it.