Deploy Node.js SDK in AWS Lambda

Last updated on May 12, 2026

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Overview

This page provides information on how to deploy Node.js SDK code in AWS Lambda services.

Before you begin

• Use similar Node.js SDK code as in the JavaScript SDK example.
• AWS Lambda supports Node 10.x runtime (as of writing).
• Make sure your environment uses Node 10.x or compatible version.

Step-by-step Guide

1. Create your Node.js project

   Add an index.js file with the following content. Replace the placeholders SDK API KEY, USER ID, and SPLIT NAME with your actual values:

   const SplitFactory = require('@splitsoftware/splitio').SplitFactory;
   
   const factory = SplitFactory({
     core: {
       authorizationKey: 'SDK API KEY'
     },
     startup: {
       readyTimeout: 10
     },
     scheduler: {
       impressionsRefreshRate: 1,
       eventsPushRate: 2,
     },
     debug: true
   });
   
   exports.handler = async (event) => {
     const client = factory.client();
     try {
       await client.whenReady();
     } catch (error) {
       console.log("SDK_READY_TIMED_OUT event emitted. Treatments will be control");
     }
   
     const treatment = client.getTreatment("USER ID", "SPLIT NAME");
     console.log("\ntreatment: " + treatment);
     return treatment;
   };

2. Install the SDK dependency

   Run this command at your project root to install the Node.js SDK package:

   npm install --save @splitsoftware/splitio@10.16.0

3. Prepare deployment package

   Zip the index.js file and the node_modules folder into function.zip.

4. Create your Lambda function

   

   • Login to AWS Console
   • Go to Lambda → Functions
   • Click Create function
   • Choose Author from scratch
   • Select Node.js 10.x runtime
   • Give your function a name
   • Click Create function

5. Configure Lambda function settings

   

   • Under Basic settings, set Memory (e.g., 256 MB)
   • Set Timeout (e.g., 1 minute)

6. Upload your deployment package

   Using the AWS CLI, upload your zipped package:

   aws lambda update-function-code --function-name YOUR_FUNCTION_NAME --zip-file fileb://function.zip

7. Configure test event

   

   • In the Lambda console, select Configure test events
   • Use the Hello World template
   • Provide necessary event key-value data (if needed)
   • Save the test event

8. Test your Lambda function

   

   • Click Test
   • The expected output should be the treatment value
   • Logs will show any additional debug information

This example demonstrates how to run the Split Node.js SDK within AWS Lambda and retrieve feature flag treatments programmatically.