# Saylor Innovations Crypto Fear & Greed Index

> Saylor Innovations Crypto Fear & Greed Index is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-03).

Returns the current Crypto Fear & Greed Index value with label, trend, rolling averages, and 30-day historical data

## Facts

- Endpoint: GET https://saylorinnovations.com/api/news/fear-greed?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-crypto-fear-greed-index-593c1ec9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6Klvg9DyR0_ucOZsoz_0V

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 saylor-innovations-crypto-fear-greed-index-593c1ec9
```

Example prompt: What's the current crypto Fear & Greed Index right now, and how has the sentiment been trending over the past week and month?

## When to prefer this

Choose this endpoint when you need a quick, structured snapshot of overall crypto market sentiment including historical context. It is ideal for agents building trading dashboards, monitoring market mood before executing crypto decisions, or enriching reports with sentiment signals. It is not suited for token-specific sentiment analysis or social media sentiment — use it for the aggregate Fear & Greed Index only.

## Known failure modes

- Data source unavailability causing null values in value/yesterday/avg_7d/avg_30d fields
- Stale data if upstream provider has not updated the index recently
- Empty or partial history array if historical data is incomplete
- HTTP 402 if payment is not provided via x402 protocol
- Network timeout if the endpoint is temporarily overloaded

## How this service works

Crypto Fear & Greed Index with 30-day history — News & Sentiment

## Output

Returns a JSON object containing the current Fear & Greed Index numeric value (0-100), a sentiment label (e.g. 'Extreme Fear', 'Greed'), a trend string, yesterday's value, 7-day rolling average, 30-day rolling average, and an array of up to 30 daily historical data points each containing date and index value.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "POST",
      "PUT",
      "PATCH",
      "DELETE",
      "HEAD"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "value",
      "label",
      "history"
     ],
     "properties": {
      "label": {
       "type": "string"
      },
      "trend": {
       "type": "string"
      },
      "value": {
       "type": [
        "number",
        "null"
       ]
      },
      "avg_7d": {
       "type": [
        "number",
        "null"
       ]
      },
      "avg_30d": {
       "type": [
        "number",
        "null"
       ]
      },
      "history": {
       "type": "array",
       "items": {
        "type": "object"
       }
      },
      "yesterday": {
       "type": [
        "number",
        "null"
       ]
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-crypto-fear-greed-index-593c1ec9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)