# CoinMarketCap API: Get Fear and Greed Index

> Returns the current crypto Fear and Greed Index with yesterday, last week and last month comparisons, plus total crypto market size, BTC and ETH dominance from CoinMarketCap.

Unofficial. Not affiliated with or endorsed by CoinMarketCap.

- Page: https://fous.com/methods/coinmarketcap.com/get-fear-and-greed-index
- Method: `coinmarketcap.com/get_fear_and_greed_index`, version 1
- Website: coinmarketcap.com
- Returns: index value and label, past comparisons, market cap, 24h volume, dominance, update time
- Effect: read (it gets data and changes nothing)
- Sign-in: none needed
- Cost: 1 credit per completed run (1¢ with pay as you go); failed runs are free
- Verified: Nov 2, 2026

## Inputs

No inputs.

## Output

From a run on Oct 23, 2026. Its input:

```json
{}
```

Its output:

```json
{
  "currency": "USD",
  "page_url": "https://coinmarketcap.com/charts/fear-and-greed-index/",
  "index_label": "Neutral",
  "index_value": 48,
  "last_week_value": 50,
  "yesterday_value": 48,
  "index_updated_at": "2026-10-23T07:53:10Z",
  "last_month_value": 74,
  "total_market_cap_usd": 2732028899220.677,
  "total_volume_24h_usd": 70877827969.96,
  "bitcoin_dominance_percent": 59.984745021747,
  "ethereum_dominance_percent": 10.72936412948,
  "total_market_cap_change_24h_percent": -0.5958
}
```

## Run it

From code, with a Fous API key in `FOUS_API_KEY`; the answer's `data` holds the output:

```bash
curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"method":"coinmarketcap.com/get_fear_and_greed_index","input":{}}'
```

From an AI agent connected to the Fous MCP server: its `run` with the same method and input. To connect one, give it `set up https://fous.com/SKILL.md`.

## Ask your agent

- What is the crypto Fear and Greed Index reading right now, and how does it compare to yesterday, last week, and last month?
- Show me today's crypto market sentiment score along with its label, like Fear, Neutral, or Greed.
- Can you check the total cryptocurrency market cap, 24-hour trading volume, and current Bitcoin and Ethereum dominance percentages on CoinMarketCap?
- I want to know whether investors are feeling greedy or fearful in crypto today, and when that index was last updated.
- Give me a snapshot of the overall crypto market: sentiment index value, total market capitalization, BTC dominance, and ETH dominance.

## Input schema

```json
{
  "type": "object",
  "required": [],
  "properties": {}
}
```

## Output schema

```json
{
  "type": "object",
  "required": [
    "index_value",
    "index_label",
    "yesterday_value",
    "last_week_value",
    "last_month_value",
    "total_market_cap_usd",
    "total_market_cap_change_24h_percent",
    "total_volume_24h_usd",
    "bitcoin_dominance_percent",
    "ethereum_dominance_percent",
    "currency",
    "index_updated_at",
    "page_url"
  ],
  "properties": {
    "currency": {
      "type": "string",
      "description": "Currency of market capitalization and trading volume: USD."
    },
    "page_url": {
      "type": "string",
      "description": "CoinMarketCap Fear and Greed Index chart page."
    },
    "index_label": {
      "type": "string",
      "description": "Current score label: Extreme fear, Fear, Neutral, Greed, or Extreme greed."
    },
    "index_value": {
      "type": "integer",
      "description": "Current Fear and Greed score on a 0–100 scale."
    },
    "last_week_value": {
      "type": "integer",
      "description": "Fear and Greed score one week ago."
    },
    "yesterday_value": {
      "type": "integer",
      "description": "Fear and Greed score yesterday."
    },
    "index_updated_at": {
      "type": "string",
      "format": "date-time",
      "description": "Time CoinMarketCap updated the index, in ISO 8601 UTC."
    },
    "last_month_value": {
      "type": "integer",
      "description": "Fear and Greed score one month ago."
    },
    "total_market_cap_usd": {
      "type": "number",
      "description": "Total cryptocurrency market capitalization in USD."
    },
    "total_volume_24h_usd": {
      "type": "number",
      "description": "Total cryptocurrency trading volume over 24 hours in USD."
    },
    "bitcoin_dominance_percent": {
      "type": "number",
      "description": "Bitcoin share of the total cryptocurrency market capitalization, in percent."
    },
    "ethereum_dominance_percent": {
      "type": "number",
      "description": "Ethereum share of the total cryptocurrency market capitalization, in percent."
    },
    "total_market_cap_change_24h_percent": {
      "type": "number",
      "description": "Percentage change in total cryptocurrency market capitalization over 24 hours."
    }
  },
  "additionalProperties": false
}
```

## See more

- [CoinMarketCap API: Get coin price](https://fous.com/methods/coinmarketcap.com/get-coin-price.md): Gets a cryptocurrency's price, changes, supply, market cap, volume and all-time high in a chosen currency. If a name or symbol is shared, returns the coin with the largest market cap.
- [CoinMarketCap API: List top coins by market cap](https://fous.com/methods/coinmarketcap.com/list-top-coins.md): Lists the largest cryptocurrencies on CoinMarketCap ranked by market cap. Each coin comes with its price, changes, volume and supply in the chosen currency.
- [CoinMarketCap API: List gainers and losers](https://fous.com/methods/coinmarketcap.com/list-gainers-and-losers.md): Lists the largest price rises and falls among CoinMarketCap's top 100 coins with over $50,000 in 24-hour volume, for a chosen period.
- [Coinbase API: Get coin overview](https://fous.com/methods/coinbase.com/get-coin-overview.md): Gets a cryptocurrency's price, 24-hour change, market statistics, popularity, tradability, description and website from its public Coinbase price page.
- [CoinGecko API: Get coin price on date](https://fous.com/methods/coingecko.com/get-coin-price-on-date.md): Gets a coin's price, market cap and 24-hour volume at 00:00 UTC on a past date. Non-USD currencies are available only for the last 365 days.
- [CoinGecko API: Get coin price history](https://fous.com/methods/coingecko.com/get-coin-price-history.md): Gets a coin's daily prices and price change over the last 7, 30, 90 or 365 days, with UTC dates. Today's price may change.
- [CoinGecko API: List trending coins](https://fous.com/methods/coingecko.com/list-trending-coins.md): Lists up to 15 of the most-searched coins on CoinGecko in trending order, with price and 24-hour change in the chosen currency. Non-USD prices may be unavailable for some coins.
- [Kraken API: Get coin price](https://fous.com/methods/kraken.com/get-coin-price.md): Gets a coin's current Kraken price, bid and ask, and 24-hour trading statistics in a chosen currency, with change since today's midnight UTC open.
- [All CoinMarketCap methods](https://fous.com/methods/coinmarketcap.com.md)