404 Not Found Caused by an Incorrect Request URL

This article examines an error that might occur when you send a request to YouTrack REST API. You can face this error when the request URL contains an unsupported path or an encoded whitespace character.

Error Message

            {
                "error": "Not Found",
                "error_description": "HTTP 404 Not Found"
            }
        

Request Details

Here are the details about a sample request that might result in this error.

Attribute	Value
Request method	POST
Incorrect endpoint	`/api/admin/issues%C2%A0`
HTTP response code	404

This endpoint in this example is incorrect and caused the error. The %C2%A0 sequence is an encoded non-breaking space appended to the path.

Troubleshooting

Here are some possible causes and suggestions on how to overcome the error and send the request to the correct resource.

Cause

The request URL is incorrect. In this example, the path contains the unsupported /api/admin/issues resource and ends with %C2%A0, which is an encoded non-breaking space.

Solution

Check the request URL against the REST API reference and remove encoded whitespace characters from the path.

To create an issue, send the request to the following endpoint:

/api/issues

For general information about composing request URLs, see REST API URL and Endpoints.

13 August 2026