> ## Documentation Index
> Fetch the complete documentation index at: https://companyname-a7d5b98e-security-edits.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

TON Center HTTP APIs: read blockchain data, query smart contracts, send transactions.

<Columns cols={3}>
  <Card title="API v2" icon="bolt" href="/ecosystem/api/toncenter/v2/overview">
    Direct liteserver for balances, sending transactions, contract queries.
  </Card>

  <Card title="API v3" icon="database" href="/ecosystem/api/toncenter/v3/overview">
    Indexed database for traces, Jettons, NFTs, and historical queries.
  </Card>

  <Card title="Streaming API v2" icon="signal-stream" href="/ecosystem/api/toncenter/streaming/overview">
    Low-latency updates on subscriptions through SSE or WebSockets.
  </Card>
</Columns>