Ampt Universal Runtime

The Ampt Universal Runtime is a Node-backed layer that sits in front of your application code to normalize incoming requests and provide a consistent execution environment across AWS compute technologies. It adapts events from different sources (API Gateway, Lambda function URLs, Fargate, Lambda@Edge, and more) into a single, predictable request format, so the same handler code runs on serverless functions, containers, and edge-based technologies without any application changes.

Features include:

• Support for Node.js v24.x, v22.x, v20.x, and v18.x
• Automatic TypeScript transpilation with source maps and tsconfig paths support
• Hot-reloading of code in dev mode
• Request adaption from various event sources into a consistent format (e.g. fetch)
• HTTP response streaming support across all supported compute targets
• Consistent error handling, logging, and request metadata regardless of the underlying compute

Depending on your project's needs, you can configure the runtime and build version using the settings below.

Runtime version #

The runtime setting controls the version of the Ampt runtime used to run your application code.

package.json
{
  "ampt": {
    "runtime": "nodejs24"
  }
}

The available runtime versions are:

• nodejs24: Node.js v24.x (default)
• nodejs22: Node.js v22.x
• nodejs20: Node.js v20.x
• nodejs18: Node.js v18.x (deprecated)

We recommend updating to the latest runtime version, and testing your application in a development environment before deploying to production.

Build version #

The buildRuntime setting controls the version of the Ampt runtime used to build your application.

package.json
{
  "ampt": {
    "buildRuntime": "nodejs24"
  }
}

The available build runtime versions are:

• nodejs24: Node.js v24.x (default)
• nodejs22: Node.js v22.x
• nodejs20: Node.js v20.x
• nodejs18: Node.js v18.x (deprecated)

We recommend updating to the latest build runtime version. Always test your build scripts in a development environment before deploying to production.