> For the complete documentation index, see [llms.txt](https://developers.oxylabs.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.oxylabs.io/products/web-unblocker/response-codes.md).

# Response Codes

Understand most common Web Unblocker response codes from 200 to 550. Learn what each HTTP status means and how to troubleshoot errors.

<table><thead><tr><th width="129.59895833333331">Code</th><th>Status</th><th>Description</th></tr></thead><tbody><tr><td><code>200</code></td><td><code>OK</code></td><td>All went well, the request succeeded.</td></tr><tr><td><code>400</code></td><td><code>Multiple error messages</code></td><td>Wrong request structure. It could be a misspelled parameter or an invalid value. The response body will have a more specific error message.</td></tr><tr><td><code>401</code></td><td><p><code>Authorization header not provided</code> <code>Invalid authorization header</code></p><p><code>Client not found</code></p></td><td>The authorization header is missing, or your login credentials are incorrect.</td></tr><tr><td><code>403</code></td><td><code>Forbidden</code></td><td>Your account does not have access to this resource on the target website.</td></tr><tr><td><code>404</code></td><td><code>Not Found</code></td><td>The target website server understands the request but refuses to authorize it.</td></tr><tr><td><code>408</code></td><td><code>Timeout</code></td><td>The request timed out.</td></tr><tr><td><code>429</code></td><td><code>Too many requests</code></td><td>You have exceeded the rate limit.</td></tr><tr><td><code>500</code>, <code>502</code>, <code>503</code></td><td><code>Internal Server Error</code></td><td>We're experiencing some issues on our side. Please try again a bit later. We're probably aware of the issues, but you can give us a shout and report it anyway.</td></tr><tr><td><code>550</code></td><td><code>Faulted After Too Many Retries</code></td><td>Something went wrong, and we failed the job you submitted. You can try again at no extra cost, as we don't charge you for faulted jobs. If that doesn't work, please get in touch with us.</td></tr></tbody></table>


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