AWS Systems Manager Parameter Store is regional by design.

If you create a parameter in ap-south-1, it doesn't automatically exist in us-east-1.

For teams running disaster recovery environments, active-passive architectures, or multi-region applications, maintaining identical configuration across regions quickly becomes an operational challenge.

In this guide, we'll build a fully serverless solution that automatically replicates SSM parameters whenever they are created, updated, or deleted.

The solution uses: