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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(57.599999999999994, 14.000000000000002%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMV%3C/text%3E%3C/svg%3E)
following below document
https://learn.microsoft.com/en-us/azure/azure-monitor/platform/data-collector-api?WT.mc_id=Portal-Microsoft_Azure_Support#authorization
shared key generated using document provided c# code
always getting below error
@mani vincent
Based off the error message, it looks like your Authorization header might be incorrect.
-Can you try removing "SharedKey" and just keeping the token. You can also try using "Bearer" instead of SharedKey.
-Since you're using Postman to perform a RESTAPI call, have you followed this documentation to get the correct Auth Token and set up Postman?
If you have any other questions, please let me know.
Thank you for your time and patience throughout this issue.
@mani vincent
I just wanted to check in and see if you were able to review my previous post.
If you have any other questions, please let me know.
Thank you for your time and patience throughout this issue.
The Sources client authentication key was correct and hmac signature procedure was also correct.
Cause:-
payload length mismatch calculation while creating signature,
Issue resolved by fixing client code