Crypto Fear & Greed Index API
Access the global crypto market sentiment baseline using the free Alternative.me API.
API Endpoint
Base URL: https://api.alternative.me/fng/
The API requires no authentication or API keys.
Get Current Sentiment
Fetch the latest daily Fear & Greed metric (0-100 score + classification label):
curl -s "https://api.alternative.me/fng/?limit=1"
Returns a JSON structure containing:
value: The 0-100 numerical score.value_classification: The textual label (e.g. "Extreme Fear", "Fear", "Greed", "Extreme Greed").timestamp: Unix epoch of the data point.
Common Use Cases
Sentiment Baseline Anchoring
When conducting qualitative sentiment analysis on news headlines or on-chain flows, first fetch the Fear & Greed index to anchor your assumptions about retail psychology.
- If
value< 25 (Extreme Fear): The market is highly sensitive to bearish catalysts. Price may be artificially depressed. - If
value> 75 (Extreme Greed): The market is euphoric and ignoring risk. High danger of sudden liquidations or corrections.