> ## Documentation Index
> Fetch the complete documentation index at: https://t3sa.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Your digital dollar cash earning U.S. Treasury yield, without changing custodians.

TESA is B2B treasury infrastructure that puts a company's digital dollar cash to work earning U.S. Treasury yield, without changing custodians and without building an in-house trading desk.

USDC comes in through Circle's native rail and is allocated to tokenized Treasuries. The consolidated yield of the default portfolio is around **5.1% per year**, with daily liquidity and end-to-end on-chain traceability.

<CardGroup cols={2}>
  <Card title="How it works" icon="workflow" href="/docs/en/produto/como-funciona">
    From USDC to Treasury yield on a single rail, via Circle CCTP.
  </Card>

  <Card title="TESA API" icon="plug" href="/docs/en/api/introducao">
    Positions, allocations and redemptions from your own system. Draft specification.
  </Card>

  <Card title="Yield and allocation" icon="chart-line" href="/docs/en/produto/yield-e-alocacao">
    Where the yield comes from and how the portfolio is split.
  </Card>

  <Card title="Custody and compliance" icon="shield-check" href="/docs/en/operacao/custodia-e-compliance">
    Non-custodial: keys stay with the custodian you already use.
  </Card>

  <Card title="Getting started" icon="rocket" href="/docs/en/operacao/como-comecar">
    From first contact to yielding cash, in four steps.
  </Card>

  <Card title="Pricing" icon="receipt" href="/docs/en/operacao/preco">
    5% of the yield generated, never of the principal.
  </Card>
</CardGroup>

## Value proposition

<Columns cols={2}>
  <Card title="Your dollars, your control" icon="key-round">
    The operation is non-custodial and keys stay with the custodian the company already uses.
  </Card>

  <Card title="A single rail" icon="route">
    No third-party bridge, no wrapped token, no new custody integration.
  </Card>

  <Card title="Daily liquidity" icon="zap">
    Cash stays available and redemptions settle in seconds.
  </Card>

  <Card title="We only earn when you earn" icon="percent">
    The fee applies to the yield generated, never to the principal.
  </Card>
</Columns>

## Who it is for

<Info>
  Companies with dollar cash, a centralized treasury and meaningful volume. TESA is B2B infrastructure and does not serve individuals.
</Info>

## Explore the documentation

<CardGroup cols={2}>
  <Card title="Product" icon="layers" href="/docs/en/produto/recursos">
    Features, yield, supported networks and assets.
  </Card>

  <Card title="Operations" icon="briefcase" href="/docs/en/operacao/preco">
    Pricing, use cases and onboarding.
  </Card>

  <Card title="Reference" icon="book-open" href="/docs/en/referencia/faq">
    Glossary, FAQ, risks and considerations.
  </Card>

  <Card title="API" icon="plug" href="/docs/en/api/introducao">
    Integration via API, with a non-custodial model. Draft specification.
  </Card>
</CardGroup>