> ## 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.

# What's a Skill

> Arrays Skills are Markdown files that teach your AI agent how to use the Arrays API — no SDK, no glue code.

## How Skills work

A Skill is a single `SKILL.md` file with YAML frontmatter. When you point a markdown-aware agent at it, the agent reads the file as **system context** and learns:

1. What domain this Skill covers (equity fundamentals, crypto futures, etc.)
2. The base URL and auth header
3. Every available endpoint, parameter, and response shape
4. Edge cases and conventions (e.g. fiscal vs calendar quarters)

The agent then composes its own HTTP calls — no plugin runtime, no MCP server, just text.

<Info>
  All 20 Skills are open-source MIT at [github.com/ArraysData/arrays-skills](https://github.com/ArraysData/arrays-skills).
</Info>

## Agent compatibility matrix

| Agent / IDE | Status | How to install |
| - | - | - |
| **Claude Code** | ✅ Supported | [Install guide →](/skills/install-claude-code) |
| **OpenAI Codex CLI** | ✅ Supported | [Install guide →](/skills/install-codex) |
| **Gemini CLI** | ✅ Supported | `scripts/install.sh` → `~/.gemini/skills/` |
| **Cline (VS Code)** | ✅ Supported | `scripts/install.sh` → `~/.cline/skills/` |
| **Cursor** | ✅ Supported | [Install guide →](/skills/install-cursor) |
| **Windsurf** | ✅ Supported | Same as Cursor — add to project rules |
| **GitHub Copilot** | ✅ Supported | `scripts/install-copilot.sh` → `.github/copilot-instructions.md` |
| **Kiro (AWS)** | ✅ Supported | Open the repo directory — Kiro reads `SKILL.md` natively |
| **ChatGPT (custom GPTs)** | ⚠️ Workaround | Paste SKILL.md contents into instructions |
| **Other markdown-aware agents** | ✅ Generally compatible | Add `SKILL.md` to agent context |

One command detects every installed agent above and symlinks the skills into place:

```bash theme={null}
git clone https://github.com/ArraysData/arrays-skills.git ~/.arrays-skills
bash ~/.arrays-skills/scripts/install.sh
```

<Tip>
  Skills work with any agent that supports the open Skill standard. See the full list of compatible agents at [skills.sh/agent](https://www.skills.sh/agent).
</Tip>

## Available Skills

20 skills across equities, crypto, ETFs, macro, and alternative data. Each is a `SKILL.md` you point your agent at.

### Equities

| Skill | What it does |
| - | - |
| `arrays-data-api-equity-fundamentals` | Company profiles (US + non-US listings), financial statements, SEC 10-K / 10-Q filings, executive comp, shares float / outstanding, fiscal dates |
| `arrays-data-api-equity-estimates-and-targets` | Analyst estimates, price targets, earnings guidance |
| `arrays-data-api-equity-events` | Dividends, splits, earnings calendar, earnings & event transcripts, SEC earnings releases, IPO, M\&A, equity offerings, crowdfunding |
| `arrays-data-api-equity-ownership-and-flow` | Institutional holdings, insider & congress trades, short interest |
| `arrays-data-api-stock-metrics` | Financial + technical metrics (ROE, margins, RSI, MACD, PE…), darkpool OHLC, PIT ratings |
| `arrays-data-api-stock-screener` | Screen stocks by country, sector, financials, events |
| `arrays-data-api-options` | Option contracts, options OHLCV/VWAP, historical Greeks + IV, option-chain snapshots |

### Crypto

| Skill | What it does |
| - | - |
| `arrays-data-api-spot-market-price-and-volume` | US and non-US stock kline; crypto spot OHLCV (Binance USDT, Hyperliquid USDC); unified candles by trading pair and trading-pair discovery |
| `arrays-data-api-crypto-futures-data` | Perp OHLCV (Binance, Hyperliquid incl. HIP-3), funding rates, open interest, long-short, taker volume |
| `arrays-data-api-crypto-metrics-and-screener` | Token metadata, market cap, supply, fear & greed, on-chain metrics (MVRV, NUPL, SOPR…), unlock schedules, screener |
| `arrays-data-api-crypto-exchange-flow` | Exchange inflow / outflow / netflow |
| `arrays-data-api-crypto-analytics-passthrough` | On-chain analytics passthrough — \~245 upstream endpoints (network data, miner/entity flows, DEX/AMM) |
| `arrays-data-api-company-crypto-holdings` | Which companies hold which crypto |

### ETF & Macro

| Skill | What it does |
| - | - |
| `arrays-data-api-etf-fundamentals` | Holdings, info, country/sector weightings, fund flow |
| `arrays-data-api-macro-and-economics` | Treasury, CPI, GDP, unemployment, forex, commodities, indexes, VIX |

### Alternative Data

| Skill | What it does |
| - | - |
| `arrays-data-api-news` | Market news with sentiment scores and topic / source filters, plus the wire news stream (per-story symbols and industries) |
| `arrays-data-api-social-feeds` | X/Twitter handle feeds, post lookup by URL, full-text search, handle metadata, tracking discovery |
| `arrays-data-api-podcast-transcripts` | Podcast episode transcripts with resolved speakers, show catalog, person registry and lookup by id, incremental transcript updates |
| `arrays-data-api-polymarket` | Prediction markets — pricing, positions, holders, trade history. Calls Polymarket public APIs directly (no Arrays endpoint, no API key) |
| `arrays-data-api-semiconductor-price` | DRAM / NAND Flash / memory-card spot & contract prices, DXI index |

<Info>
  Browse the source for any skill in the [arrays-skills repo](https://github.com/ArraysData/arrays-skills/tree/main/skills).
</Info>

## Next step

<Card title="Install your first Skill" icon="rocket" href="/skills/install-claude-code">
  Pick your agent and follow a 30-second guide.
</Card>


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