SERVICE

crypto-fear-greed

Xynaptic Crypto Fear & Greed — the market sentiment thermometer (alternative.me index, 0-100): current value, yesterday, last week, classification (extreme fear..extreme greed) + interpretation hint for agents. GET no params.

$0.02 per call · /v1/crypto-fear-greed

Call it

curl -s https://api.xynaptic.io/v1/crypto-fear-greed \
  -H "Accept: application/json"

# -> 402 Payment Required (x402 challenge: price, payTo, networks)
# -> sign the payment, retry with PAYMENT-SIGNATURE -> 200

What you get back

{
  "service": "crypto-fear-greed",
  "value": 34,
  "classification": "fear",
  "yesterday": 41,
  "last_week": 55,
  "summary": "Market in fear (34/100), down from 41 yesterday."
}