SDK overview

FlagFix ships client libraries. They talk to the FlagFix API, not to the dashboard session.

Your app (browser / Node / React)
        │  X-FlagFix-Sdk-Key
        ▼
   https://api.flagfix.io
        ├── /api/v1/runtime/*   flags
        └── /api/v1/ingest/*    events

Which package should I install?Copy Anchor Link

@flagfix/react depends on @flagfix/browser. Do not import @flagfix/sdk-core in your application. It is installed for you.

Quick startCopy Anchor Link

1. Install the package for your runtime
2. Create a key in the FlagFix dashboard (Client or Server)
3. Set apiHost to https://api.flagfix.io, or to the API host your company uses
4. Call start(), then identify / hasFeature / track

import { createFlagFix } from "@flagfix/browser";

const client = createFlagFix({
  clientKey: process.env.NEXT_PUBLIC_FLAGFIX_CLIENT_KEY!,
  apiHost: "https://api.flagfix.io",
});

await client.start();
client.identify("user_123", { plan: "pro" });
if (client.hasFeature("new_checkout")) {
  client.trackExposure("new_checkout");
}

NextCopy Anchor Link

• Installation
• JavaScript browser · Node · React
• Unit testing
• API reference

SDK package version 0.1.0 and runtime contract 1.0.0 are different numbers. Do not treat them as a single “platform version”.