# Octodamus X Sentiment Scan

> Octodamus X Sentiment Scan is a paid API for AI agents from api.octodamus.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-14).

Returns a real-time crypto trading signal (BUY/SELL/HOLD) with sentiment, BTC trend, fear/greed index, and Polymarket edge derived from X (Twitter) sentiment analysis

## Facts

- Endpoint: GET https://api.octodamus.com/v2/x_sentiment/scan
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/octodamus-x-sentiment-scan-6de292e7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2_0Q3JQU3Qe3FA8c37OUp

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-x-sentiment-scan-6de292e7
```

Example prompt: What's the current X sentiment signal for crypto — is it bullish or bearish, and should I be buying, selling, or holding BTC right now?

## When to prefer this

Choose this endpoint when you need a fast, pay-per-call, real-time crypto sentiment signal derived specifically from X (Twitter) social data, including a BUY/SELL/HOLD action, fear/greed score, and Polymarket edge — especially useful for agents making autonomous trading or alerting decisions without needing a subscription.

## Known failure modes

- Missing or invalid PAYMENT-SIGNATURE header returns 402 Payment Required
- Expired or already-used payment signature returns 402
- Insufficient USDC balance on Base mainnet causes payment failure
- Network or upstream data unavailability may return 5xx error
- Malformed GET request returns 400

## How this service works

Octodamus X Sentiment Scan -- pay-per-call x402 endpoint on Base. Preview: https://api.octodamus.com/v2/x_sentiment/scan/preview

## Output

Returns a structured object with: a trading action recommendation (BUY, SELL, or HOLD), a sentiment signal (BULLISH, BEARISH, or NEUTRAL), a BTC trend direction (UP, DOWN, or SIDEWAYS), a confidence score between 0 and 1, a fear/greed index score from 0 to 100, a natural-language reasoning string explaining the signal, and a Polymarket edge object with prediction market insights.

## 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"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/octodamus-x-sentiment-scan-6de292e7/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)