# Crypto fear and greed index API

The Crypto Fear & Greed Index (0 = extreme fear, 100 = extreme greed) from alternative.me: today's value and label, the change against 1, 7 and 30 days ago, the low, high and average over the window, and the daily history (up to 90 days, default 30). Updated once a day. Use as a market-sentiment input for a trading agent, a dashboard or a daily brief; for live prices use price_token.

## Fear and greed index, crypto: today's value and history

Fear and greed index, crypto: today's value and history. $0.01 per successful call; failed calls are never charged.

The Crypto Fear & Greed Index (0 = extreme fear, 100 = extreme greed) from alternative.me: today's value and label, the change against 1, 7 and 30 days ago, the low, high and average over the window, and the daily history (up to 90 days, default 30). Updated once a day. Use as a market-sentiment input for a trading agent, a dashboard or a daily brief; for live prices use price_token.

Inputs: days: Days of history, 1-90 (default 30).

Free first (25 successful calls per caller, no key):

    curl "https://tools.funwords.eu/crypto/fear-greed?days=30&trial=1"

With a card key from https://tools.funwords.eu/credits, in a header or, when your client can only fetch a URL, in the URL:

    curl -H "Authorization: Bearer adt_…" "https://tools.funwords.eu/crypto/fear-greed?days=30"
    curl "https://tools.funwords.eu/crypto/fear-greed?days=30&api_key=adt_…"

Without a key the same URL answers 402 with x402 and MPP terms, so a wallet client pays USDC per call and retries. Over MCP (https://tools.funwords.eu/mcp) this tool is crypto_fear_greed.

Example result:

    {
      "value": 51,
      "classification": "Neutral",
      "date": "2026-10-24",
      "change": {
        "vs1d": 1,
        "vs7d": -17,
        "vs30d": 9
      },
      "range": {
        "low": 38,
        "high": 72,
        "average": 54.2,
        "days": 30
      },
      "nextUpdateSeconds": 62493,
      "history": [
        {
          "date": "2026-10-24",
          "value": 51,
          "classification": "Neutral"
        }
      ],
      "source": "alternative.me",
      "attribution": "Crypto Fear & Greed Index by alternative.me (https://alternative.me/crypto/fear-and-greed-index/)"
    }

Tool page: https://tools.funwords.eu/tools/crypto-fear-greed

## Crypto market overview: sentiment, prices, funding and signals

Crypto market overview: sentiment, prices, funding and signals. $0.03 per successful call; failed calls are never charged.

Market sentiment, prices and signals in one call: the Fear & Greed index with its 7-day change (alternative.me, attributed), the 10 most traded Hyperliquid perpetuals with price, 24-hour change, funding and open interest, technical readings (RSI, MACD, moving averages) for up to three coins, and Bitcoin fee rates. Cheaper than the five tools bought one by one. Use for a daily market brief, a trading agent's context or a dashboard.

Inputs: coins: Up to 3 coins for technical readings, comma separated (default BTC,ETH,SOL).

Free first (25 successful calls per caller, no key):

    curl "https://tools.funwords.eu/pack/crypto-market?coins=BTC%2CETH%2CSOL&trial=1"

With a card key from https://tools.funwords.eu/credits, in a header or, when your client can only fetch a URL, in the URL:

    curl -H "Authorization: Bearer adt_…" "https://tools.funwords.eu/pack/crypto-market?coins=BTC%2CETH%2CSOL"
    curl "https://tools.funwords.eu/pack/crypto-market?coins=BTC%2CETH%2CSOL&api_key=adt_…"

Without a key the same URL answers 402 with x402 and MPP terms, so a wallet client pays USDC per call and retries. Over MCP (https://tools.funwords.eu/mcp) this tool is pack_crypto_market.

Example result:

    {
      "pack": "crypto-market",
      "coins": [
        "BTC",
        "ETH",
        "SOL"
      ],
      "sentiment": {
        "value": 51,
        "classification": "Neutral",
        "change7d": -4,
        "attribution": "Crypto Fear & Greed Index by alternative.me"
      },
      "topMarkets": [
        {
          "coin": "BTC",
          "markPx": 81870,
          "change24hPct": 0.66,
          "fundingAprPct": 10.95,
          "openInterestUsd": 3401847000,
          "dayVolumeUsd": 2604051652
        }
      ],
      "signals": [
        {
          "coin": "BTC",
          "close": 81870,
          "rsi14": 48.2,
          "readings": [
            "RSI neutral (30-70)",
            "price above SMA 200"
          ]
        }
      ],
      "bitcoinFees": {
        "nextBlock": 3,
        "hour": 2,
        "unit": "sat/vB"
      },
      "failed": {}
    }

Tool page: https://tools.funwords.eu/tools/pack-crypto-market

## Questions

Docs for agents: https://tools.funwords.eu/llms.txt · OpenAPI: https://tools.funwords.eu/openapi.json · All guides: https://tools.funwords.eu/guides