cmc-api-market

# CoinMarketCap Market API Skill

This skill covers market-wide cryptocurrency data including global metrics, sentiment indicators, market indices, community activity, news content, charting data, and utility endpoints.

## Authentication

All requests require the `X-CMC_PRO_API_KEY` header.

```bash
curl -X GET "https://pro-api.coinmarketcap.com/v1/global-metrics/quotes/latest" \
  -H "X-CMC_PRO_API_KEY: your-api-key"
```

Get your API key at: https://pro.coinmarketcap.com/login

## Base URL

```
https://pro-api.coinmarketcap.com
```

## Common Use Cases

See [use-cases.md](references/use-cases.md) for goal-based guidance on which endpoint to use:

1. Get current market sentiment (Fear & Greed)
2. Get total crypto market cap
3. Get BTC dominance
4. Track market cap history
5. Track Fear & Greed history
6. Get CMC100 index performance
7. Compare CMC100 vs CMC20
8. Get OHLCV candlestick data for charts
9. Get simple price time series
10. Get community trending tokens
11. Get trending discussion topics
12. Get latest crypto news
13. Convert currency amounts
14. Check API usage and limits
15. Get fiat currency IDs

## API Overview

### Global Metrics

| Endpoint | Description | Reference |
|----------|-------------|-----------|
| GET /v1/global-metrics/quotes/historical | Historical global market metrics | [global-metrics.md](references/global-metrics.md) |
| GET /v1/global-metrics/quotes/latest | Latest total market cap, BTC dominance | [global-metrics.md](references/global-metrics.md) |

### Fear and Greed Index

| Endpoint | Description | Reference |
|----------|-------------|-----------|
| GET /v3/fear-and-greed/historical | Historical fear/greed values | [fear-greed.md](references/fear-greed.md) |
| GET /v3/fear-and-greed/latest | Current market sentiment score | [fear-greed.md](references/fear-greed.md) |

### Market Indices

| Endpoint | Description | Reference |
|----------|-------------|-----------|
| GET /v3/index/cmc100-historical | CMC100 index history | [i...