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      • Set up Node.js (server-side) SDK
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  • Install the package
  • Initialize the SDK
Get startedOnboarding

Set up Node.js (server-side) SDK

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Set up Python SDK

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Install the package

$yarn add @launchdarkly/node-server-sdk

Initialize the SDK

Node.js (server-side) SDK initialization
1import * as LaunchDarkly from '@launchdarkly/node-server-sdk';
2
3// This is your LaunchDarkly SDK key.
4// Never hardcode your SDK key in production.
5const client = LaunchDarkly.init('YOUR_SDK_KEY');
6
7client.once('ready', function () {
8 // For onboarding purposes only we flush events as soon as
9 // possible so we quickly detect your connection.
10 // You don't have to do this in practice because events are automatically flushed.
11 client.flush();
12 console.log('SDK successfully initialized!');
13});
Finding your SDK credentials

You can find your server-side SDK keys, mobile keys, and client-side ID on the SDK keys page under Settings.

To learn more, read Initialize the client in the Node.js (server-side) SDK reference guide.