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

# Introduction

> Replyke is infrastructure for user-powered applications — auth, social graph, content, chat, community spaces, and more, pre-built and ready to integrate.

Every product eventually needs users to *do* something — comment on a post, react to content, follow a topic, send a message, join a community. Sometimes that's the core of what you're building. Sometimes it's just one part: a blog, a support page, a changelog with reactions.

The typical answer is a third-party tool. But third-party tools mean your users create *another* account, in someone else's UI, disconnected from your product. The experience fragments — and you lose control.

Replyke is the alternative. It gives you the complete set of social primitives — feeds, comments, chat, notifications, and more — as infrastructure you own. Bring your existing users via a signed JWT, or let Replyke handle auth entirely. Either way: one unified user identity, your design, whether social features are the heart of your product or just one corner of it.

## What's Included

Replyke ships with every building block a user-powered application needs:

<CardGroup cols={3}>
  <Card title="Auth & Identity" icon="key">
    Built-in email/password auth, OAuth (Google, GitHub, and more), external JWT integration for bringing your own auth system, and multi-account support.
  </Card>

  <Card title="Entities" icon="file-lines">
    The core content unit — posts, articles, listings, anything your users create. Comes with votes, reactions, view tracking, file attachments, drafts, and publishing workflows.
  </Card>

  <Card title="Comments" icon="comments">
    Threaded discussions on any entity. Nested replies, votes, emoji reactions, GIF support, @mentions, and moderation built in.
  </Card>

  <Card title="Spaces" icon="layer-group">
    Hierarchical community spaces with membership, role-based permissions, moderation tools, rules, space-level chat, and a digest/newsletter system.
  </Card>

  <Card title="Chat" icon="message">
    Real-time 1:1 and group conversations with message reactions, threaded replies, read state, typing indicators, and moderation.
  </Card>

  <Card title="Social Graph" icon="users">
    Unidirectional follows and bidirectional connection requests (friend-style). Full follower/following counts, status checks, and bulk queries.
  </Card>

  <Card title="Collections" icon="bookmark">
    User-owned bookmarking and folder system for saving entities. Sub-collections, entity management, and saved-state checks.
  </Card>

  <Card title="App Notifications" icon="bell">
    In-app notification system for users. Delivered via webhook to your server for push bridging, email relay, or any downstream action.
  </Card>

  <Card title="Semantic Search & AI" icon="magnifying-glass">
    Automatic content embedding for entities, comments, messages, users, and spaces. Enables semantic search across all content types and an AI-powered ask endpoint that synthesizes answers from your data.
  </Card>

  <Card title="Storage" icon="hard-drive">
    File and image uploads with server-side processing. Used for entity attachments, user avatars, banner images, and chat attachments.
  </Card>

  <Card title="Moderation" icon="shield">
    Report flows for entities, comments, and chat messages. Space-level moderation actions, ban management, and report resolution tools.
  </Card>

  <Card title="Reactions" icon="face-smile">
    Emoji reactions on entities and comments. Six reaction types out of the box (like, love, wow, sad, angry, funny), with counts and per-user state.
  </Card>
</CardGroup>

## How It Works

Every Replyke project gets a hosted API endpoint. Your application talks to that endpoint — either through the React/React Native SDK (which handles tokens, state, and real-time automatically) or directly via the REST API.

All data is scoped to your project. Users, entities, conversations, and spaces exist only within your project's namespace. You can have multiple projects — a staging environment, separate apps, or white-labeled products — each fully isolated.

<Note>
  Replyke uses a project-scoped architecture. All API paths include a `projectId`. Your project ID is available in the dashboard.
</Note>

## Auth Flexibility

Replyke does not force you into one authentication model. You choose how users are identified:

* **Built-in auth** — Replyke manages the full user identity: email/password sign-up, password reset, OAuth providers. No external auth system needed.
* **External auth** — Your backend issues a signed JWT, and Replyke automatically creates or matches a user from it. Keep your existing auth stack and add Replyke alongside it.
* **OAuth** — Sign in with Google, GitHub, or other configured providers. Supports linking multiple OAuth identities to a single account.

See [Authentication](/authentication) for a full conceptual overview.

## Get Started

<CardGroup cols={2}>
  <Card title="SDK Quick Start" icon="rocket" href="/sdk/getting-started">
    Install `@replyke/react-js` or `@replyke/react-native` and get your first feature running in minutes.
  </Card>

  <Card title="Integration Options" icon="plug" href="/integration-options">
    Learn about the SDK, raw REST API, and Redux integration options — and choose the right path for your project.
  </Card>

  <Card title="Authentication" icon="lock" href="/authentication">
    Built-in, external, and OAuth auth models explained. Understand how user identity flows through Replyke.
  </Card>

  <Card title="API Reference" icon="code" href="/api-reference/getting-started">
    Complete REST API documentation — every endpoint, every field.
  </Card>

  <Card title="Data Models" icon="table" href="/data-models/user">
    TypeScript interfaces for every object your app works with: users, entities, comments, conversations, and more.
  </Card>

  <Card title="UI Components" icon="puzzle-piece" href="/components/overview">
    Pre-built, fully customizable comment sections and notification UI installed directly into your project via CLI.
  </Card>
</CardGroup>