I am getting 401 - Unauthorized when I hit meta-data API

Question

Hello Team, I am new to AWS, I have created an EC2 instance and trying to use the meta-data API from the EC2 instance and getting the below error. I checked the server time, and rebooted the instance as suggested in the forums. Not sure What I am doing wrong. Any help would be appreciated thanks! ``` 401 - Unauthorized

401 - Unauthorized

```

kentrad · Accepted Answer

Could be that your instance is using V2 of the meta data service. Take a look here to see how to obtain a token and pass it with the query.

[Add defense in depth against open firewalls, reverse proxies, and SSRF vulnerabilities with enhancements to the EC2 Instance Metadata Service](https://aws.amazon.com/blogs/security/defense-in-depth-open-firewalls-reverse-proxies-ssrf-vulnerabilities-ec2-instance-metadata-service/).

Antonio_Lagrotteria · Answer

On top of what described above, consider this guide too: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/configuring-instance-metadata-options.html

MarilynAWS · Answer

The following section provides a short explanation for each response: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-retrieval.html#instance-metadata-returns

For example:
- 401 - Unauthorized – The GET request uses an invalid token. The recommended action is to generate a new token.

I am getting 401 - Unauthorized when I hit meta-data API

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