npm i -D @alma-cdk/cross-region-parameter

Store AWS SSM Parameter Store Parameters into another AWS Region with AWS CDK.

Prefer native CDK/CloudFormation features

[!IMPORTANT] Since CloudFormation's Fn::GetStackOutput (May 2026) and [email protected], CDK passes values across regions natively — no custom resources, no SSM round-trip. For most use cases you no longer need this package.

📖 AWS What's New · AWS DevOps Blog · Deep dive by @pahud

Fn::GetStackOutput resolves values inside CloudFormation at deploy time. Reach for CrossRegionParameter only when you genuinely need an SSM Parameter to exist in the target region — because it is read at runtime by an application, by another account or tool, or by infrastructure that isn't part of this CDK app.

Getting Started

import { CrossRegionParameter } from "@alma-cdk/cross-region-parameter";

new CrossRegionParameter(this, 'SayHiToSweden', {
  region: 'eu-north-1',
  name: '/parameter/path/message',
  description: 'Some message for the Swedes',
  value: 'Hej då!',
});