# Octodamus Sentiment Divergence

> Octodamus Sentiment Divergence is a paid API for AI agents from api.octodamus.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-13).

Returns a pay-per-call crypto sentiment divergence signal including BUY/SELL/HOLD action, BTC trend, fear/greed index, and Polymarket edge data

## Facts

- Endpoint: GET https://api.octodamus.com/v2/ben/sentiment-divergence
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/octodamus-sentiment-divergence-506d2d4e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jXQIT5__5ivJekPGfCqdy

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 octodamus-sentiment-divergence-506d2d4e
```

Example prompt: What's the current Octodamus sentiment divergence signal for crypto — is the recommendation to buy, sell, or hold, and how confident is it?

## When to prefer this

Use this endpoint when you need a composite, confidence-scored crypto sentiment divergence signal that combines fear/greed index, BTC trend analysis, and Polymarket prediction market edge into a single actionable BUY/SELL/HOLD recommendation. Prefer this over raw data sources when you want a synthesized, reasoned signal rather than raw sentiment or price data.

## Known failure modes

- Missing or invalid PAYMENT-SIGNATURE header returns 402 Payment Required
- Expired or already-used EIP-3009 signature causes authentication failure
- Insufficient USDC balance on Base mainnet causes payment rejection
- Network congestion on Base mainnet may delay payment verification
- Service downtime may return 503 with no signal data

## How this service works

Octodamus Sentiment Divergence -- pay-per-call x402 endpoint on Base. Preview: https://api.octodamus.com/v2/ben/sentiment-divergence/preview

## Output

Returns a JSON object with an action enum (BUY/SELL/HOLD), a signal enum (BULLISH/BEARISH/NEUTRAL), a BTC trend direction (UP/DOWN/SIDEWAYS), a human-readable reasoning string, a confidence score between 0 and 1, a fear/greed index value between 0 and 100, and a Polymarket edge object with prediction market data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "method"
   ],
   "properties": {
    "method": {
     "type": "string",
     "const": "GET"
    },
    "headers": {
     "type": "object",
     "required": [
      "PAYMENT-SIGNATURE"
     ],
     "properties": {
      "PAYMENT-SIGNATURE": {
       "type": "string",
       "description": "x402 EIP-3009 USDC payment signature (Base mainnet)"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "action": {
     "enum": [
      "BUY",
      "SELL",
      "HOLD"
     ],
     "type": "string"
    },
    "signal": {
     "enum": [
      "BULLISH",
      "BEARISH",
      "NEUTRAL"
     ],
     "type": "string"
    },
    "btc_trend": {
     "enum": [
      "UP",
      "DOWN",
      "SIDEWAYS"
     ],
     "type": "string"
    },
    "reasoning": {
     "type": "string"
    },
    "confidence": {
     "type": "number",
     "maximum": 1,
     "minimum": 0
    },
    "fear_greed": {
     "type": "number",
     "maximum": 100,
     "minimum": 0
    },
    "polymarket_edge": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "action": "BUY",
  "signal": "BULLISH",
  "btc_trend": "UP",
  "reasoning": "Oracle 9/11 consensus bullish. Fear & Greed neutral-greed zone.",
  "confidence": 0.78,
  "fear_greed": 62,
  "polymarket_edge": {
   "ev": 0.14,
   "market": "BTC above 90k"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/octodamus-sentiment-divergence-506d2d4e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.octodamus.com](https://www.zero.xyz/host/api.octodamus.com/llms.txt)