Developer reference

Crypto F&G API

A free, CORS-enabled JSON API for the FearGreedChart Crypto Fear & Greed Index. No key required. Updated once per day.

Endpoints

GEThttps://crypto.feargreedchart.com/api/?action=crypto

Current score, the four components, and all featured modules (on-chain, altseason, leverage, three-way divergence).

GEThttps://crypto.feargreedchart.com/api/?action=crypto-history

Full daily history as an array of {date, score, price} from coverage start to today.

Example — current score ● LIVE

// GET /api/?action=crypto
{
  "date": "2026-05-28",
  "score": 53,
  "label": "Neutral",
  "components": {
    "momentum": 53,
    "volatility": 85,
    "funding": 51,
    "capital_flow": 23
  },
  "btc": { "price": 73089.61, "momentum_pct_vs_ma": -0.46 },
  "dvol": 37.26,
  "funding_ann_pct": 0.7,
  "stablecoin": { "total_usd": 319722876270, "chg_30d_pct": 0.36 },
  "onchain": { "ok": true, "mvrv": 1.385, "nupl": 0.278, "sopr": 0.996, "zone": "Optimism" },
  "altseason": { "ok": true, "eth_btc": 0.02712, "ma90": 0.02962 },
  "divergence": { "crypto": 53, "stock": 65, "altme": 22 },
  "updated": "2026-05-28T08:31:39+00:00"
}

Example — history

// GET /api/?action=crypto-history
[
  { "date": "2025-05-28", "score": 61, "price": 68420.11 },
  { "date": "2025-05-29", "score": 58, "price": 67980.42 },
  // … one object per day …
  { "date": "2026-05-28", "score": 53, "price": 73089.61 }
]

Field reference

Field	Description
`score`	Composite 0–100 (higher = greed, lower = fear)
`label`	Extreme Fear / Fear / Neutral / Greed / Extreme Greed
`components`	The four sub-scores, each 0–100
`dvol`	Deribit BTC implied volatility, %
`funding_ann_pct`	Perpetual funding rate, annualized %
`onchain`	MVRV / NUPL / SOPR (or `{ok:false}` if the source is briefly unavailable)
`divergence`	This index vs FearGreedChart stocks vs alternative.me

Score bands: 0–20 Extreme Fear · 21–40 Fear · 41–60 Neutral · 61–80 Greed · 81–100 Extreme Greed. The index is a contrarian reference point, not a trading signal.

Usage

No authentication, no rate limit for reasonable use, CORS headers set so you can call it directly from the browser. Please cache responses for a few minutes — the data only changes once per day. Attribution to FearGreedChart.com is appreciated.

// fetch from JavaScript
const r = await fetch('https://crypto.feargreedchart.com/api/?action=crypto');
const d = await r.json();
console.log(d.score, d.label);  // 53 "Neutral"