[!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.
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!',
});