> For the complete documentation index, see [llms.txt](/llms.txt).

The **Use Cases** hub groups implementation guides by goal: **Bitcoin DeFi**, **Bridge**, **Onboard**, **Pay**, and **AI**. Each guide lists prerequisites, expected outcomes, and risks where they apply.

:::note[Contribute a guide]

To propose a new guide, use the links below.

- [**Submit a Docs / Tooling Idea on the Hacktivator Marketplace**](https://hacktivator-marketplace.rootstock.io/)
- [**Join the Rootstock Discord**](https://discord.gg/rootstock)

:::

## Browse by use case

Use the filters to narrow by goal. Links go to published guides or section overviews.

- **Bitcoin DeFi**: Lending, vaults, and stablecoin flows with rBTC and on-chain assets. [View section](/use-cases/btcfi-finance-yield/)
- **Rootstock DeFi developer guide**: Token standards, security patterns, and protocol basics for DeFi on Rootstock. [View guide](/resources/guides/defi-developer-guide/)
- **Integrate USDRIF Vault on Rootstock**: Use the Vaults SDK and viem to read vault state, approve USDRIF, and deposit with slippage protection. [View guide](/use-cases/btcfi-finance-yield/yield-vaults-sdk/)
- **Cross-Chain rBTC Lending with USDT0**: Deploy an over-collateralized lending protocol on Rootstock with LayerZero cross-chain collateral and oracle routing. [View guide](/use-cases/btcfi-finance-yield/cross-chain-lending-rbtc/)
- **Constant-product AMM tutorial**: Rootstock testnet tutorial for a constant-product AMM and pool interactions. [View guide](/use-cases/interoperability/amm-constant-product/)
- **Bridge**: Peg-in, peg-out, liquidity routes, and cross-chain messaging. [View section](/use-cases/interoperability/)
- **Build Omnichain Fungible Tokens (OFTs) with LayerZero**: Cross-chain token transfers between Rootstock and Ethereum Sepolia using LayerZero OFT. [View guide](/use-cases/interoperability/rootstock-layerzero/)
- **Omnichain Liquidity Routing with LI.FI**: Integrate LI.FI into your Rootstock dApp for single-transaction cross-chain liquidity. [View guide](/use-cases/interoperability/integrate-lifi/)
- **Onboard**: Wallet connection, social login, and low-connectivity onboarding patterns. [View section](/use-cases/onboarding-ux/)
- **Getting Started with Para**: Para SDK provider setup, Rootstock testnet config, and modal options for social login and external wallets. [View guide](/use-cases/onboarding-ux/para/)
- **Internet-Free DeFi with USSD**: Relay server and smart contract pattern for feature-phone users on GSM networks without mobile data. [View guide](/use-cases/onboarding-ux/ussd-rootstock-defi/)
- **AI**: MCP server setup and agent patterns for on-chain reads and actions. [View section](/use-cases/ai-automation/)
- **Conversational App with On-Chain Actions**: Connect a chat-style UI to Rootstock testnet for balance checks and simple transactions. [View guide](/use-cases/ai-automation/ai-agent-rootstock/)
- **Model Context Protocol (MCP) on Rootstock**: How MCP connects AI clients to Rootstock reads and scoped actions. [View guide](/use-cases/ai-automation/mcp-rootstock/)
- **DAO Voting with the Collective SDK**: Stake RIF, read proposals, simulate writes, and vote using the Collective SDK. [View guide](/use-cases/integrate-rif-economy/build-dao-voting-collective-sdk/)
- **Pay**: Programmable payments, splits, and pay-per-use APIs on Rootstock. [View section](/use-cases/payments-assets/)
- **Integrating x402 Payments with Rootstock**: HTTP 402 pay-per-use APIs on Rootstock. [View tutorial](/use-cases/payments-assets/integrate-x402/)
- **Prism payment splits**: Split one Lightning or on-chain Bitcoin payment into multiple non-custodial payouts on Rootstock. [View guide](/use-cases/payments-assets/prism-payment-splits/)