> ## Documentation Index
> Fetch the complete documentation index at: https://docs.b3.fun/llms.txt
> Use this file to discover all available pages before exploring further.

# Scaling Fun Onchain

> B3 is Base's layer 3 consumer ecosystem built for games, apps, and enterprises that require the performance to scale and the support to grow.

<iframe className="aspect-video w-full rounded-xl" src="https://customer-gg6qs7nm5ue94t64.cloudflarestream.com/2102c81d7d96da927f71e023260175c9/iframe?muted=true&loop=true&autoplay=true&poster=https%3A%2F%2Fcustomer-gg6qs7nm5ue94t64.cloudflarestream.com%2F2102c81d7d96da927f71e023260175c9%2Fthumbnails%2Fthumbnail.jpg%3Ftime%3D%26height%3D600" title="B3 SDK" frameBorder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowFullScreen />

<br />

<Card title="Quick Start Guide" icon="rocket" horizontal href="/quickstart">
  Get up and running with B3 SDK in under 5 minutes
</Card>

## Ecosystem of Products

B3 is an portfolio of products designed to bring the next generation of apps, creativity, and commerce onchain.

<Card title="Protocol Layer" icon="circle-nodes" href="/protocol/scaling" cta="Learn More">
  The B3 protocol layer is the multi-blockchain backbone of the B3 ecosystem.
</Card>

<Card title="Ecosystem Layer" icon="globe" href="/ecosystem/introduction" cta="Developer Tools">
  The B3 ecosystem layer is the open access developer infrastructure, tools, and services for building on B3.
</Card>

<Card title="Application Layer" icon="globe" href="https://explorer.b3.fun/apps" cta="Explore Apps">
  We don't just build tooling, B3 ships consumer apps that bring fun onchain & drive value back to the \$B3 token.
</Card>

### B3 AppChains The Hyper-Scalable Superchain

B3 is not just another chain, B3 connects fun experiences - games, apps, consumer projects - into a modular, scalable ecosystem that’s open, connected, and ready to grow.

Created by a team of Base/Coinbase alumni and OG Ethereum contributors.

* **modular infra**

  pick your stack, settle anywhere—base, ethereum, solana, more.

* **multi-chain network**

  launch on b3 mainnet or spin up your own gamechain with built-in support.

* **superfluid liquidity**

  built-in primitives for instant transactions, rewards, and cross-app experiences.

<img src="https://mintcdn.com/npclabs/BqgbIxC-QswCxsQH/images/gamechains-diagram.jpg?fit=max&auto=format&n=BqgbIxC-QswCxsQH&q=85&s=4b555ef0347a2677887de482fc3f55b2" alt="B3 Banner" className="w-full rounded-2xl" width="6600" height="6600" data-path="images/gamechains-diagram.jpg" />

<Steps>
  <Step title="Secured by Base">
    B3 operates as an L3 that settles on Base, providing dedicated blockspace specifically for gaming with
    lightning-fast transactions and sub-cent fees.
  </Step>

  <Step title="Multi-chain Network">
    Appchains settle onto B3, with our protocol infrastructure abstracting away the complexity of dealing with multiple
    chains.
  </Step>
</Steps>

<Card title="The Horizontally Scaling Appchain" icon="rocket" horizontal href="/protocol/scaling">
  Learn about B3's unique appchain architecture, the most scalable way to build onchain.
</Card>

## Power to Developers

<img src="https://mintcdn.com/npclabs/T8myXHRpwbznxu_Y/images/b3-banner.png?fit=max&auto=format&n=T8myXHRpwbznxu_Y&q=85&s=596d1876967f909ed18e495ac2c4a3d5" alt="Bridge to B3" className="w-full rounded-xl" width="600" height="120" data-path="images/b3-banner.png" />

Build with tools, sdk, docs, and real support that let you go from zero to live in record time. Explore the B3 SDK to immedaitely build exceptional onchain experiences:

<CardGroup cols={2}>
  <Card title="Free Data APIs" icon="database" href="/data/api-reference/introduction">
    Free, consolidated & rich data APIs & indexing on B3.
  </Card>

  <Card title="B3 SDKs" icon="code" href="/ecosystem/introduction">
    Access users, liquidity across chains, launch tokens & more.
  </Card>
</CardGroup>

## What You Can Build

<CardGroup cols={2}>
  <Card href="/sdk/global-account/authentication">
    <img src="https://mintcdn.com/npclabs/BqgbIxC-QswCxsQH/images/login-banner.jpg?fit=max&auto=format&n=BqgbIxC-QswCxsQH&q=85&s=5796a51d00597ca9a4ba0292351a366f" className="w-full h-48 object-cover rounded-xl mb-4" width="1180" height="640" data-path="images/login-banner.jpg" />

    <h3 className="text-lg font-semibold text-primary block mb-1">Instant Login</h3>

    Instantly onboard players with embedded smart accounts—just one click and they're in the game.
  </Card>

  <Card href="/sdk/global-account/introduction">
    <img src="https://mintcdn.com/npclabs/6MmTGi9wpkGI2JFJ/images/profiles-banner.jpg?fit=max&auto=format&n=6MmTGi9wpkGI2JFJ&q=85&s=4cc1fbd02fb97d46b240b1e8ce62bfd6" className="w-full h-48 object-cover rounded-xl mb-4" width="1180" height="640" data-path="images/profiles-banner.jpg" />

    <h3 className="text-lg font-semibold text-primary block mb-1">Know Your Player's Identity</h3>

    Unlock instant access to player data across the ecosystem and their onchain gamer data.
  </Card>
</CardGroup>

### Scale Your Game

<CardGroup cols={2}>
  <Card href="/basement/introduction">
    <img src="https://mintcdn.com/npclabs/BqgbIxC-QswCxsQH/images/leaderboards-banner.jpg?fit=max&auto=format&n=BqgbIxC-QswCxsQH&q=85&s=6023b1ff74ce0e75abab0336402fa5ac" className="w-full h-48 object-cover rounded-xl mb-4" width="1180" height="640" data-path="images/leaderboards-banner.jpg" />

    <h3 className="text-lg font-semibold text-primary block mb-1">Deploy Onchain Leaderboards</h3>

    Create competitive rankings tied to real gameplay data and cross-game achievements.
  </Card>

  <Card href="/basement/introduction">
    <img src="https://mintcdn.com/npclabs/T8myXHRpwbznxu_Y/images/achievements-banner.jpg?fit=max&auto=format&n=T8myXHRpwbznxu_Y&q=85&s=fd505b361a0453fdb1ac5920b40cead1" className="w-full h-48 object-cover rounded-xl mb-4" width="1180" height="640" data-path="images/achievements-banner.jpg" />

    <h3 className="text-lg font-semibold text-primary block mb-1">Create Custom Achievements</h3>

    Create onchain achievements tied to gameplay, loyalty, or community actions. Let players wear their wins across the ecosystem.
  </Card>

  <Card href="/basement/introduction">
    <img src="https://mintcdn.com/npclabs/6MmTGi9wpkGI2JFJ/images/tournaments-banner.jpg?fit=max&auto=format&n=6MmTGi9wpkGI2JFJ&q=85&s=aa98c063b33acabc4a5669872ea660de" className="w-full h-48 object-cover rounded-xl mb-4" width="1180" height="660" data-path="images/tournaments-banner.jpg" />

    <h3 className="text-lg font-semibold text-primary block mb-1">Launch Instant Tournaments</h3>

    Spin up tournaments instantly to boost retention, drive competition, and monetize your game.
  </Card>

  <Card href="/basement/introduction">
    <img src="https://mintcdn.com/npclabs/6MmTGi9wpkGI2JFJ/images/versus-banner.jpg?fit=max&auto=format&n=6MmTGi9wpkGI2JFJ&q=85&s=682e4b3245fa56a75d963b668b4c3d9c" className="w-full h-48 object-cover rounded-xl mb-4" width="1180" height="640" data-path="images/versus-banner.jpg" />

    <h3 className="text-lg font-semibold text-primary block mb-1">Enable Wager Duels</h3>

    Allow players challenge each other in real-time PvP. Add wagers, XP, or prizes to every match.
  </Card>

  <Card href="/sdk/global-account/permissions">
    <img src="https://mintcdn.com/npclabs/6MmTGi9wpkGI2JFJ/images/unlock-banner.jpg?fit=max&auto=format&n=6MmTGi9wpkGI2JFJ&q=85&s=ae1875d618f10d306080ecd28c2e46ae" className="w-full h-48 object-cover rounded-xl mb-4" width="1180" height="640" data-path="images/unlock-banner.jpg" />

    <h3 className="text-lg font-semibold text-primary block mb-1">Create Exclusivity with Token Gating</h3>

    Enable users to unlock exclusive content, game modes, or perks based on NFT or token holdings.
  </Card>

  <Card href="/ecosystem/introduction">
    <img src="https://mintcdn.com/npclabs/BqgbIxC-QswCxsQH/images/notifications-banner.jpg?fit=max&auto=format&n=BqgbIxC-QswCxsQH&q=85&s=924b7acab8b6b992f70b447c5aed39f8" className="w-full h-48 object-cover rounded-xl mb-4" width="1180" height="640" data-path="images/notifications-banner.jpg" />

    <h3 className="text-lg font-semibold text-primary block mb-1">Send Onchain Notifications</h3>

    Trigger wallet-based alerts tied to gameplay, achievements, drops, or events to re-engage users.
  </Card>
</CardGroup>

### Unlock New Ways to Monetize

<CardGroup cols={2}>
  <Card href="/anyspend/introduction">
    <img src="https://mintcdn.com/npclabs/T8myXHRpwbznxu_Y/images/anyspend-example-banner.jpg?fit=max&auto=format&n=T8myXHRpwbznxu_Y&q=85&s=fe96ac26367dda7f7cf34f3dd82ec577" className="w-full h-48 object-cover rounded-xl mb-4" width="2428" height="840" data-path="images/anyspend-example-banner.jpg" />

    <h3 className="text-lg font-semibold text-primary block mb-1">Accept Payments Without Friction</h3>

    Enable users to make purchases with no KYC using fiat or ANY token on ANY chain. It's the easiest way to pay.
  </Card>

  <Card href="/createkit/introduction">
    <img src="https://mintcdn.com/npclabs/BqgbIxC-QswCxsQH/images/claim-banner.jpg?fit=max&auto=format&n=BqgbIxC-QswCxsQH&q=85&s=5af008035b7c09fb3b7794430f85699b" className="w-full h-48 object-cover rounded-xl mb-4" width="1180" height="640" data-path="images/claim-banner.jpg" />

    <h3 className="text-lg font-semibold text-primary block mb-1">Create Native Game Tokens</h3>

    Easily create custom tokens that power progression, rewards, or ownership—natively tied to your game logic.
  </Card>

  <Card href="/createkit/introduction">
    <img src="https://mintcdn.com/npclabs/BqgbIxC-QswCxsQH/images/marketplace-banner.jpg?fit=max&auto=format&n=BqgbIxC-QswCxsQH&q=85&s=6e568f0e65bcfdf6852f369f9b76c5a1" className="w-full h-48 object-cover rounded-xl mb-4" width="1180" height="640" data-path="images/marketplace-banner.jpg" />

    <h3 className="text-lg font-semibold text-primary block mb-1">Turn Any Asset into a Marketplace</h3>

    From achievements to skins to user-generated content, turn any in-game asset into a collectible that players can trade.
  </Card>
</CardGroup>

## Why Choose B3?

<AccordionGroup>
  <Accordion title="Fast and Cheap">
    B3 delivers lightning-fast transactions with sub-cent fees through dedicated blockspace for gaming, built as an L3
    that settles on Base.
  </Accordion>

  <Accordion title="Settled on Base">
    Base is a secure, low-cost, builder-friendly L2 incubated by Coinbase. B3 leverages Base as a settlement layer,
    contributing to the Base ecosystem while extending its capabilities.
  </Accordion>

  <Accordion title="Scalable">
    Launch web2-scale games with B3's rollup engine that horizontally scales by sharding at the application layer,
    orchestrating dedicated sidecars for computationally heavy operations.
  </Accordion>

  <Accordion title="Hyper-Operable">
    B3's composable architecture enables seamless interoperability between appchains, assets, and tokens. Build true
    cross-chain experiences.
  </Accordion>

  <Accordion title="Open Ecosystem">
    No walled gardens here. Anyone can deploy and build on B3, supported by most major blockchain platforms and
    frameworks.
  </Accordion>
</AccordionGroup>

## Community & Resources

<CardGroup cols={2}>
  <Card title="Discord Community" icon="discord" href="https://discord.gg/b3dotfun">
    Join our developer community for support and discussions
  </Card>

  <Card title="GitHub Repository" icon="github" href="https://github.com/b3-fun/b3">
    Contribute to the project and report issues
  </Card>
</CardGroup>

<Check>
  **Discover how easy it is to build on B3** Start with our [Quick Start Guide](/quickstart) and begin building the
  future of fun today.
</Check>