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.

1. If value < 25 (Extreme Fear): The market is highly sensitive to bearish catalysts. Price may be artificially depressed.
2. If value > 75 (Extreme Greed): The market is euphoric and ignoring risk. High danger of sudden liquidations or corrections.