Access the Alternative.me Crypto Fear & Greed Index. Use this tool to anchor your baseline market sentiment analysis, determining whether the broader retail market is in a state of Extreme Fear (capitulation risk) or Extreme Greed (euphoria/correction risk).
Access the global crypto market sentiment baseline using the free Alternative.me API.
Base URL: https://api.alternative.me/fng/
The API requires no authentication or API keys.
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.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.
value < 25 (Extreme Fear): The market is highly sensitive to bearish catalysts. Price may be artificially depressed.value > 75 (Extreme Greed): The market is euphoric and ignoring risk. High danger of sudden liquidations or corrections.