> ## Documentation Index
> Fetch the complete documentation index at: https://docs.flagsync.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Learn about FlagSync’s server-side SDKs for multi-user contexts.

## Overview

FlagSync’s server-side SDKs are designed for multi-user contexts like web servers and APIs:

<CardGroup cols={3}>
  <Card href="/sdks-server-side/nodejs" title="Node.js">
    <img alt="User segment targeting rule creation" src="https://mintcdn.com/flagsync/dTCxWdoh9aH45uVC/images/sdk-nodejs.svg?fit=max&auto=format&n=dTCxWdoh9aH45uVC&q=85&s=c4e86611e51f0a201e2b7c8593692c08" className="h-12 my-4" width="80" height="91" data-path="images/sdk-nodejs.svg" />

    For Node.js-based servers and APIs.
  </Card>

  <Card href="/sdks-server-side/nextjs" title="Next.js">
    <img alt="User segment targeting rule creation" src="https://mintcdn.com/flagsync/dTCxWdoh9aH45uVC/images/sdk-nextjs.svg?fit=max&auto=format&n=dTCxWdoh9aH45uVC&q=85&s=9f7ce1b7d070119e6029f79cf7ee6c0f" className="h-12 my-4" width="80" height="80" data-path="images/sdk-nextjs.svg" />

    For Next.js-based server-side rendering (App Router).
  </Card>

  <Card href="/sdks-server-side/nestjs" title="Nest.js">
    <img alt="User segment targeting rule creation" src="https://mintcdn.com/flagsync/dTCxWdoh9aH45uVC/images/sdk-nestjs.svg?fit=max&auto=format&n=dTCxWdoh9aH45uVC&q=85&s=b5eb4ec68d99ce0093e82fc3e589f5d8" className="h-12 my-4" width="94" height="91" data-path="images/sdk-nestjs.svg" />

    For Nest.js-based server applications.
  </Card>
</CardGroup>

<Tip>
  Need another language or framework? Contact <a href="mailto:support@flagsync.com">FlagSync Support</a> to explore adding it to our roadmap.
</Tip>

## Next Steps

Get started with server-side SDKs:

* Learn about client-side SDKs in [Client-Side SDKs](/sdks-client-side/overview).
* Set up an SDK in [Setup](/sdks/setup).
* Start with [Quickstart: SDK](/quickstarts/sdk).