Common response headers
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Updated at June 11, 2025
Apart from the standard HTTP headers, Yandex Object Storage uses additional response headers.
The table below describes additional headers as well as standard headers requiring clarification.
| Header | Description |
|---|---|
ETag |
MD5 hash of an object if the object is uploaded as a single file. If the object is uploaded as a multipart upload, then to calculate the ETag value, you need to get the MD5 hash sum of the uploaded parts (MD5_sum) and add the number of parts (N) to the resulting string: "MD5_sum-N".It does not include object metadata. |
X-Amz-Request-Id |
Unique request ID. You may need it when contacting the Yandex Cloud support service if any problems occur. |
If a request is sent with CORS headers, the response may contain headers for a response to the options preflight request.