# Quotient Mispriced Prediction Markets Screen

> Quotient Mispriced Prediction Markets Screen is a paid API for AI agents from quotient-api-gateway.onrender.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Returns prediction markets where Quotient's independent probability forecast disagrees with live venue odds, ranked by edge spread, to surface value bets and trading ideas.

## Facts

- Endpoint: GET https://quotient-api-gateway.onrender.com/api/v1/markets/mispriced
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quotient-mispriced-prediction-markets-screen-d60ecb75
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_y5O88SCquTjTpmQn5wlH7

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 quotient-mispriced-prediction-markets-screen-d60ecb75
```

Example prompt: Show me the most mispriced prediction markets on Polymarket right now — sort by biggest spread and only include markets where Quotient's forecast disagrees by at least 10 percentage points with odds updated in the last 24 hours.

## When to prefer this

Use this endpoint when you need to actively screen for trading opportunities rather than browsing all markets — it is the purpose-built mispricing scanner that saves you from computing spreads yourself. Prefer this over the general market browse endpoint when your goal is edge discovery. Choose it when you want to filter by venue, sort by spread magnitude, or set a minimum disagreement threshold to focus only on high-conviction discrepancies.

## Known failure modes

- No markets found matching filter criteria — try reducing min_spread or removing venue filter
- Stale forecasts if max_forecast_age is set very low and Quotient hasn't updated recently
- Venue temporarily unavailable — some markets may be excluded from results
- Payment failure or insufficient USDC balance returns 402 error
- Rate limiting or service unavailability on Render hosting returns 5xx

## How this service works

Use this to rank covered markets where Quotient's probability differs from a verified live venue quote. The endpoint batches live reads, then applies the odds band, spread threshold, direction, and sort to one selected quote. Missing, stale, and unsupported live quotes are excluded. Returns quote provenance, routing, Q probability, spread, thesis, and venue-reported volume.

## Output

A ranked list of prediction markets where Quotient's modeled probability diverges from live venue odds, including: each market's Quotient forecast probability, current venue odds, spread in percentage points, direction of mispricing (market over- or under-priced), Quotient's thesis for its forecast, market volume, and venue. Results are ordered by the requested sort field (default: spread descending).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input",
  "output"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "sort": {
       "enum": [
        "spread_desc",
        "spread_asc",
        "updated_desc",
        "volume_desc"
       ],
       "type": "string"
      },
      "topic": {
       "type": "string"
      },
      "venue": {
       "enum": [
        "polymarket",
        "polymarket_us",
        "kalshi",
        "limitless"
       ],
       "type": "string",
       "description": "Prediction-market venue key: polymarket (Polymarket International), polymarket_us (Polymarket US), kalshi, or limitless."
      },
      "min_spread": {
       "type": "number",
       "default": 0.05,
       "maximum": 1,
       "minimum": 0
      },
      "max_forecast_age": {
       "type": "integer",
       "default": 48,
       "minimum": 1
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quotient-mispriced-prediction-markets-screen-d60ecb75/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quotient-api-gateway.onrender.com](https://www.zero.xyz/host/quotient-api-gateway.onrender.com/llms.txt)