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

# Welcome to Arrays

> One unified data engine for intelligent finance — 100+ API endpoints across equities, crypto, ETF, macro, and on-chain data, accessible from your AI agent or your code.

## Two ways to integrate

Pick how you call Arrays — both hit the same 100+ endpoints.

<CardGroup cols={2}>
  <Card title="🧩 Skills" icon="puzzle-piece" href="/skills/overview">
    **For AI agents.** Install our Markdown skills into Claude Code, Cursor, Codex, or Windsurf — the agent calls the API for you.
  </Card>

  <Card title="🔌 REST API" icon="plug" href="/api-reference/introduction">
    **For developers.** A single API key, 100+ endpoints, SDKs for curl / Python / Node / Go.
  </Card>
</CardGroup>

## Two ways to pay

Choose the billing model that fits your workload — both work across Skills and the REST API.

<CardGroup cols={2}>
  <Card title="💳 Subscription" icon="credit-card" href="/pricing">
    **Predictable, all data.** Pick a plan, get an API key, and call every endpoint. Best for steady workloads and teams who want a dashboard.
  </Card>

  <Card title="🪙 Nanopayment" icon="coins" href="/nanopayment/overview">
    **Pay per call, no signup.** Settle each request in USDC via x402 + Circle Gateway. Crypto endpoints today, more soon.
  </Card>
</CardGroup>

## Data coverage

<CardGroup cols={2}>
  <Card title="Equities" icon="building">
    50+ exchanges, fundamentals, estimates, insider/senate trades, options
  </Card>

  <Card title="Crypto" icon="bitcoin-sign">
    500+ tokens, spot + futures, on-chain metrics, exchange flow, screener
  </Card>

  <Card title="ETF & Funds" icon="layer-group">
    Holdings, sector weights, fund flow
  </Card>

  <Card title="Macro" icon="globe">
    CPI, GDP, Treasury, forex, commodities, VIX
  </Card>

  <Card title="Alt-data" icon="database">
    Earnings transcripts, SEC filings, prediction markets
  </Card>
</CardGroup>

## Get up and running in 60 seconds

<Steps>
  <Step title="Get an API key">
    Sign up at [arrays.org](https://arrays.org) and copy your key from the dashboard.
  </Step>

  <Step title="Pick your path">
    Use **Skills** if you're inside an AI agent, or the **REST API** if you're writing code.
  </Step>

  <Step title="Make your first call">
    Follow the [Quickstart](/quickstart) — every path gets you a working response in under a minute.
  </Step>
</Steps>

<Tip>
  New to Arrays? Start with the [Quickstart](/quickstart). Already have a key? Jump to [API Reference](/api-reference/introduction).
</Tip>