Server response check

You can use the Server response check tool to find out whether the site pages are accessible to the Yandex robots, as well as other information about the site, such as the status of the SSL certificate.
  1. How do I check the server response in Yandex.Webmaster?
  2. FAQ
Attention. If the server response differs from the HTTP status code 200 OK or it returns a message from the list below, the page is excluded from the search results.
The server response can be displayed as:
HTTP code.
For more information, see HTTP status codes reference.
The SSL certificate status for the HTTPS sites
The SSL certificate status message for the site
The certificate issuing authority wasn't found.
The certificate signature couldn't be decrypted. The RSA key value doesn't match the expected value.
The public key can't be read.
The certificate signature is invalid.
The certificate isn't active yet.
Certificate expired.
Error in the certificate effective date.
Error in the certificate expiry date.
The certificate is self-signed and isn't found in the list of trusted certificates.
The certificate chain may contain untrusted certificates, but the root certificate wasn't found.
The CA certificate wasn't found.
Signatures can't be verified because the certificate chain contains only one certificate and it isn't self-signed.
The certificate is revoked.
The certificate authority is invalid.
Certificate chain length exceeded.
Invalid certificate type.
The root certificate authority is not trusted.
The root certificate authority rejected the certificate.
Unknown certificate error.
The root certificate is blacklisted.
The certificate has already been issued to another site.
Node certificate is missing.

To resolve problems with the SSL certificate, contact your certification center or your hosting provider.

Other message
Message Note
Document failed to load It appears for the following reasons:
  • The robot's request is blocked on the server side or a connection fault occurs when trying to get a response. In this case, check whether the robot is blocked by IP.
  • DNS error. Make sure that the site is accessible and the DNS is configured properly. If the settings have been changed recently, the data is updated within 24 hours.
  • Response timeout expired. A response should be received within 3 seconds.
Failed to connect to the server
A connection failure occurred
The noindex tag disables URL indexing The page has the robots meta tag with the noindex directive.
URL indexing is disallowed in the robots.txt file The robots.txt file contains the Disallow directive that prohibits indexing the page or directory where it's located.
The document size is too large The maximum page size is 10 MB.
Document format not supported HTML documents and files of the following types are supported: PDF, DOC/DOCX, XLS/XLSX, PPT/PPTX (MS Office); ODS, ODP, ODT, ODG (Open Office); RTF, TXT, and SWF.
Invalid response code Standard HTTP status codes are supported.
The document language isn't recognized. List of supported languages.
The document doesn't contain text. The page is empty or has no content that can be indexed by the robot.
Page content is missing

Check the following in your server settings:

  • HTTP header. For example, if it contains "Content-length: 0", the robot will fail to index the page.
  • The size of the page content. It must be greater than 0 and match the HTTP header.
Sample message
Note. A response received using the “Server response check” tool may differ from the actual response to the robot, since the tool has a different IP. You can check the response in your server logs.

How do I check the server response in Yandex.Webmaster?

  1. Go to the Server response check page.
  2. In the Requested URL field, enter the URL of the page you want to check. For example,
  3. In the Robot field, select the robot to check if it can access the page. The drop-down list contains the main robots that crawl most sites. Once you select the robot, its User-agent is displayed under the field. For more information, see Yandex robots in server logs.
  4. Click Check.
You can also check the response if your server responds to the If-Modified-Since header with the HTTP status code 304 (Not Modified). To do this, specify the date and time in the If-Modified-Since field:
  • When the page being checked was last updated. In this case, the received response must contain the HTTP status code 200 OK.
  • A different date: you'll get a response with code 304 (Not Modified).


The “Document contains no text” status is displayed when checking Sitemap.

The status indicates that the robot can't index the file as a regular site page and include its contents in search results. This status doesn't affect the Sitemap processing. To check the Sitemap for correctness, use the Sitemap validator tool in Yandex.Webmaster.

The “URL has been excluded from indexing with the "noindex" tag” status is displayed when checking Sitemap.
The status indicates that the file is closed from indexing — as a rule, the ban is set in the X-Robots-Tag HTTP header. The directive prohibits a file from appearing in search results, but doesn't affect the processing of the Sitemap content. To check the Sitemap for correctness, use the Sitemap validator tool in Yandex.Webmaster.

Specify the tool in which you found the error, describe the situation in as much detail as possible, and if necessary, attach a screenshot that illustrates it.