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

# For Composing Protocols

> Use CPI to build new DeFi primitives on top of Voltr vaults

Build on top of Voltr vaults via Cross-Program Invocation — tranching, fractional reserve, derivatives, and more.

<CardGroup cols={2}>
  <Card title="CPI Overview" icon="plug" href="/protocols/cpi-integration/index">
    Integration guide and PDA derivation
  </Card>

  <Card title="Deposit" icon="arrow-down-to-bracket" href="/protocols/cpi-integration/deposit">
    Deposit assets into vaults
  </Card>

  <Card title="Withdraw" icon="arrow-up-from-bracket" href="/protocols/cpi-integration/withdraw">
    Two-step and instant withdrawal flows
  </Card>
</CardGroup>