Crypto Fear & Greed Index API

Base URL

https://api.alternative.me/fng

Authentication

No key or registration. Attribution to alternative.me is requested when you display the index.

Rate limit

No published limit. The index changes once a day, so caching costs nothing.

Pricing

Free.

CORS

Enabled — callable directly from browser JavaScript

Official docs

Read the docs

Every request below was executed against the live API on 2026-08-21, and the response shown is the real body it returned — not an illustration.

curl 'https://api.alternative.me/fng/?limit=2'

const res = await fetch("https://api.alternative.me/fng/?limit=2");
if (!res.ok) throw new Error(`Request failed: ${res.status}`);
const data = await res.json();
console.log(data);

import requests

res = requests.get("https://api.alternative.me/fng/?limit=2", timeout=20)
res.raise_for_status()
print(res.json())

{
  "name": "Fear and Greed Index",
  "data": [
    {
      "value": "72",
      "value_classification": "Greed",
      "timestamp": "1787270400",
      "time_until_update": "58448"
    },
    {
      "value": "62",
      "value_classification": "Greed",
      "timestamp": "1787184000"
    }
  ],
  "metadata": {
    "error": null
  }
}

namestring

`Fear and Greed Index`.

data[].valuestring

The score from 0 to 100, as a string. 0 is extreme fear, 100 extreme greed.

data[].value_classificationstring

Text band — Extreme Fear, Fear, Neutral, Greed or Extreme Greed.

data[].timestampstring

Unix seconds for the day the reading belongs to, quoted as a string.

data[].time_until_updatestring

Seconds until the next update. Present only on the newest entry, which makes it a reliable current-reading marker.

metadata.errorstring|null

Null on success; carries an error message otherwise.

• Display a crypto sentiment gauge on a dashboard
• Chart sentiment against price over a historical period
• Log the daily reading into your own time series
• Identify the current reading by the presence of `time_until_update`