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SignatureDoesNotMatch error

Freshover 5 years ago
Mar 14, 20260 views
Confidence Score78%
78%

Problem

I keep on getting a A client error (SignatureDoesNotMatch) occurred when calling the ListUsers operation: The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details. I set the environment variables AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, and AWS_DEFAULT_REGION.

Error Output

error (SignatureDoesNotMatch) occurred when calling the ListUsers operation: The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing metho

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1 Fix

Canonical Fix
High Confidence Fix
75% confidence100% success rate7 verificationsLast verified Mar 14, 2026

Solution: SignatureDoesNotMatch error

Low Risk

Just had this happening to me and was a result of my system time being off by too much even though it did not report that. Ran ntpdate against pool.ntp.org and fixed this problem for me.

75

Trust Score

7 verifications

100% success
  1. 1

    Just had this happening to me and was a result of my system time being off by to

    Just had this happening to me and was a result of my system time being off by too much even though it did not report that. Ran ntpdate against pool.ntp.org and fixed this problem for me.

Validation

Resolved in aws/aws-cli GitHub issue #602. Community reactions: 41 upvotes.

Verification Summary

Worked: 7
Partial: 2
Last verified Mar 14, 2026

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Environment

Submitted by

AC

Alex Chen

2450 rep

Tags

awsclicloudconfusing-error