# Scanna Heat Signal – Single Market Deep Dive

> Scanna Heat Signal – Single Market Deep Dive is a paid API for AI agents from api.scanna.xyz, paid per call via x402, $0.010001/call, status unknown (last checked 2026-09-14).

Returns a full computed signal breakdown for one Polymarket or Kalshi prediction market, including heat score, volume-spike multiplier, order-flow bias, whale activity, volatility, liquidity, and YES/NO prices.

## Facts

- Endpoint: POST https://api.scanna.xyz/heat
- Price: $0.010001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/scanna-heat-signal-single-market-deep-dive-b2104c81
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JGqE2ibIl5V41XrXy3vR6

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 scanna-heat-signal-single-market-deep-dive-b2104c81 -d '<json body>'
```

Example prompt: Pull the full signal breakdown for Polymarket market ID 0x1234abcd — I want the heat score, volume-spike multiplier, order-flow bias, whale activity, and current YES/NO prices using the default lookback window.

## When to prefer this

Use this endpoint when you need a comprehensive, computed signal profile for a single known prediction market — not just raw odds. It is the right choice when you need heat scoring, whale tracking, order-flow bias, and volatility in one call. Prefer this over raw price endpoints (like the /prices sibling) when you want actionable trading signals rather than just current YES/NO quotes, and over the risk-grade endpoint when you need granular numeric metrics rather than a letter grade.

## Known failure modes

- Invalid or unknown market_id returns a 404 or error JSON
- Market not yet indexed returns an empty or null result
- Malformed POST body (missing market_id) returns a 400 validation error
- Upstream data unavailable causes a 503 or degraded signal response
- Payment failure (insufficient USDC) causes a 402 response before computation

## How this service works

Full signal breakdown for one prediction market on Polymarket or Kalshi: heat score, volume-spike multiplier, lookback and 24h volume, liquidity, order-flow bias and score, volatility, whale activity, and both YES and NO prices. POST a market_id, taken from any GET /hot entry, optionally with a custom lookback window. Computed signal, not raw odds. Billed on success. JSON.

## Output

A JSON object containing the computed heat score (0–100 scale), volume-spike multiplier, lookback volume, 24-hour volume, liquidity in USD, order-flow bias direction and score, volatility metric, whale activity indicator, and current YES and NO prices for the specified prediction market.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "market_id"
     ],
     "properties": {
      "market_id": {
       "type": "string",
       "description": "Condition ID. Obtainable from markets[].market_id of any GET /hot result."
      },
      "lookback_minutes": {
       "type": "integer",
       "default": 30,
       "maximum": 1440,
       "minimum": 5,
       "description": "Minutes of trade history to analyse (5-1440)"
      }
     },
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "market_id",
      "platform",
      "question",
      "heat_score",
      "volume_spike_x",
      "liquidity_usd",
      "volume_lookback",
      "volume_24h",
      "flow_bias",
      "flow_score",
      "volatility",
      "price_yes",
      "price_no",
      "signals"
     ],
     "properties": {
      "signals": {
       "type": "array",
       "items": {
        "type": "string"
       },
       "description": "Human-readable signal sentences, not machine tokens"
      },
      "platform": {
       "enum": [
        "polymarket",
        "kalshi"
       ],
       "type": "string"
      },
      "price_no": {
       "type": "number"
      },
      "question": {
       "type": "string"
      },
      "flow_bias": {
       "enum": [
        "buy",
        "sell",
        "neutral"
       ],
       "type": "string"
      },
      "market_id": {
       "type": "string"
      },
      "price_yes": {
       "type": "number"
      },
      "flow_score": {
       "type": "number"
      },
      "heat_score": {
       "type": "number",
       "description": "Composite 0-1"
      },
      "volatility": {
       "enum": [
        "low",
        "medium",
        "high"
       ],
       "type": "string",
       "description": 
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scanna-heat-signal-single-market-deep-dive-b2104c81/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.scanna.xyz](https://www.zero.xyz/host/api.scanna.xyz/llms.txt)