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Softlaunch SDKs load your configuration snapshot and evaluate flags locally. Pick the SDK that matches where your code runs.

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Client vs. server

Client SDKs

Run in browsers, mobile apps, and other public clients. Use a client key (slc_), which serves an obfuscated configuration.

Server SDKs

Run in trusted backends. Use a server key (sls_), which reads the full configuration. Keep it secret.

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Available SDKs

React

@softlaunch/react — a provider and hooks for React apps.

JavaScript

@softlaunch/js — a client for any JavaScript runtime.
More SDKs are on the way:

Node.js

Coming soon

Go

Coming soon

Python

Coming soon

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A shared API

Every SDK exposes one typed accessor per flag type. The arguments are the same everywhere:
The typed accessors are getBooleanFlag, getStringFlag, getIntegerFlag, getNumericFlag, and getJsonFlag (the React SDK exposes the same set as hooks: useBooleanFlag, and so on).
SDKs stay subscribed after the first load. When you change a flag, connected SDKs receive the update in real time and re-evaluate.