CoinMarketCap Global Metrics — Market Cap, Dominance, Fear & Greed

CoinMarketCap Global Metrics fetches a real-time snapshot of the entire crypto market — total market cap, 24h volume, BTC/ETH/altcoin dominance, DeFi market cap, stablecoin volume, active cryptocurrencies count, and Fear & Greed index. Data from CoinGecko + Alternative.me. No API key required. $0.005 flat/run.

The total crypto market cap, dominance percentages, and Fear & Greed index are the foundational macro inputs for any crypto strategy. This actor delivers all of them in one structured JSON record — schedulable, automatable, and free of API key management.

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Why use CoinMarketCap Global Metrics?

1. Live dashboard widgets — Embed real-time market cap, dominance, and Fear & Greed into Grafana, Notion, Telegram bots, or custom web apps on any schedule.
2. Sentiment threshold alerts — Automate alerts when Fear & Greed crosses extreme levels (< 20 = extreme fear = historical buying zone; > 80 = extreme greed = distribution zone).
3. Dominance shift monitoring — Track BTC vs. ETH vs. altcoin dominance daily. Rising altcoin dominance + falling BTC dominance = alt season signal.
4. Market regime classification — Combine total market cap trend with Fear & Greed and dominance to classify current regime (risk-on/off, alt season/BTC dominance) for rule-based portfolio decisions.
5. Historical dataset accumulation — Schedule daily runs to build a time-series of global metrics. Lightweight alternative to expensive data provider subscriptions.

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How to use

1. Open the actor on Apify Store and click Try for free.
2. Toggle includeFearGreed or includeDominance as needed (both default to true).
3. Click Start — completes in under 15 seconds.
4. View the single output record in the Dataset tab.
5. Schedule hourly or daily for time-series accumulation.

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Input

Field	Type	Default	Description
includeFearGreed	boolean	true	Fetch Alternative.me Fear & Greed Index (0-100 + classification)
includeDominance	boolean	true	Include BTC, ETH, and altcoin dominance breakdown

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Output

{
  "total_market_cap_usd": 2780000000000,
  "total_volume_24h_usd": 98000000000,
  "btc_dominance_pct": 52.3,
  "eth_dominance_pct": 17.1,
  "altcoin_dominance_pct": 30.6,
  "active_cryptocurrencies": 14200,
  "active_exchanges": 1100,
  "defi_volume_24h_usd": 8500000000,
  "defi_market_cap_usd": 120000000000,
  "stablecoin_volume_24h_usd": 45000000000,
  "market_cap_change_24h_pct": 1.42,
  "fear_greed_value": 65,
  "fear_greed_classification": "Greed",
  "fetched_at": "2026-09-01T12:00:00Z"
}

Output fields

Field	Description
total_market_cap_usd	Total crypto market cap across all tracked assets
btc_dominance_pct	Bitcoin's share of total market cap (%)
eth_dominance_pct	Ethereum's share of total market cap (%)
altcoin_dominance_pct	All non-BTC/ETH combined dominance (%)
defi_market_cap_usd	Total DeFi market capitalization
stablecoin_volume_24h_usd	Stablecoin 24h trading volume
fear_greed_value	0 = extreme fear, 100 = extreme greed
fear_greed_classification	Extreme Fear, Fear, Neutral, Greed, Extreme Greed

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Cost estimation

Flat $0.005 per run.

Schedule	Runs/month	Monthly cost
Daily	30	$0.15
Every 6 hours	120	$0.60
Hourly	720	$3.60
Every 15 minutes	2,880	$14.40

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FAQ

What is the Fear & Greed index source? Alternative.me, which aggregates volatility, market momentum/volume, social media, market dominance, and Google Trends into a daily 0–100 score. Updates once per day — intraday runs return the same value.

Why CoinGecko instead of CoinMarketCap directly? CoinGecko provides equivalent global metrics through a free public API without authentication or rate-limit management. The output aligns closely with what CMC reports.

Can I combine this with per-coin actors? Yes — use this for the macro layer (total cap, dominance, Fear & Greed) and combine with Bitcoin Network Health, Crypto Exchange Flow, or Institutional Flows for the asset-level layer.

How does dominance shifting signal alt season? BTC dominance falling + total market cap rising = capital rotating from BTC to altcoins. Combine with altcoin_dominance_pct trending up for a high-conviction alt season signal.

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Related actors

• Altcoin BTC-Relative Performance — Per-pair alt season signal to complement the aggregate dominance data
• Bitcoin Network Health Dashboard — On-chain BTC metrics to pair with macro market cap data
• Institutional Crypto Flows — ETF demand data that drives total market cap movements

Disclaimer: Data is for informational purposes only and does not constitute financial advice.

Feedback

If this actor powers your crypto dashboard, a review helps others find it: Leave a review on Apify Store

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Keywords: CoinMarketCap global metrics, total crypto market cap, BTC dominance tracker, ETH dominance, DeFi market cap, altcoin season signal, crypto market sentiment, Fear Greed Index, 24h trading volume crypto, active cryptocurrencies count, crypto macro dashboard, market cap scraper