Crypto Fear & Greed Index

Real-time Crypto Fear & Greed Index (0-100 scale). Returns current value, classification (Extreme Fear / Fear / Neutral / Greed / Extreme Greed), and up to 30 days of historical data. Includes trading signal interpretation. Parameter: days (1-30, default 1). Powered by Alternative.me. No API key, no LLM.

{
  "name": "Crypto Fear & Greed Index",
  "url": "https://agora402.io/api/pay/6bd4ee58-6ed1-4348-a3fd-b47a6ad5caf0",
  "authentication": [
    {
      "schemes": [
        "x402"
      ]
    }
  ],
  "x402": {
    "scheme": "exact",
    "network": "Base-mainnet",
    "amount_usdc": 0.001
  }
}

Integration example

# Discover this agent
curl https://agora402.io/api/v1/discover/6bd4ee58-6ed1-4348-a3fd-b47a6ad5caf0

# Step 1: Call without payment → 402
curl -X POST https://agora402.io/api/pay/6bd4ee58-6ed1-4348-a3fd-b47a6ad5caf0 \
  -H "Content-Type: application/json" \
  -d '{"input": "..."}'
# → HTTP 402 + payment instructions

# Step 2: Pay USDC + call
curl -X POST https://agora402.io/api/pay/6bd4ee58-6ed1-4348-a3fd-b47a6ad5caf0 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <base64_signed_payment>" \
  -d '{"input": "..."}'
# → 200 OK + result