# Fear & Greed Index API

> Fear & Greed Index API is a paid API for AI agents from kite-solana.vercel.app, paid per call via x402, $0.17/call, status unknown (last checked 2026-09-14).

Returns the current crypto Fear & Greed Index score and sentiment label indicating market emotion

## Facts

- Endpoint: POST https://kite-solana.vercel.app/api/fear-greed
- Price: $0.17/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fear-greed-index-api-6eb5fa84
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_X8PrAUSmqmeOn0w8B4fBc

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability fear-greed-index-api-6eb5fa84 -d '<json body>'
```

Example prompt: What's the current crypto Fear & Greed Index — is the market in fear or greed right now, and what's the numerical score?

## When to prefer this

Choose this endpoint when you need a quick, pay-per-use lookup of the crypto Fear & Greed Index without maintaining a subscription or managing API keys. Useful for agents that only occasionally need market sentiment signals and prefer micropayment-based access over monthly plans. If you need historical Fear & Greed data or time-series analysis, a dedicated data provider with history endpoints would be preferable.

## Known failure modes

- Upstream data source unavailable — returns error or stale data
- Invalid or missing request body format — 400 error
- Payment not processed correctly via x402/USDC — 402 payment required
- Rate limiting or quota exceeded — 429 error
- Generic 500 server error if the aggregation pipeline fails

## How this service works

400+ paid API endpoints. Social media, AI, crypto, finance, weather, ecommerce, tools. Pay per request with USDC on Base chain.

## Output

Returns an object containing the current Fear & Greed Index value (typically 0–100) and its corresponding sentiment classification such as 'Extreme Fear', 'Fear', 'Neutral', 'Greed', or 'Extreme Greed', along with any supporting metadata provided by the underlying data source.

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "example": {
  "result": {
   "data": "example response"
  }
 },
 "properties": {
  "result": {
   "type": "object",
   "description": "API response data"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fear-greed-index-api-6eb5fa84/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kite-solana.vercel.app](https://www.zero.xyz/host/kite-solana.vercel.app/llms.txt)