# Live Prediction-Market Surface (Polymarket)

> Live Prediction-Market Surface (Polymarket) is a paid API for AI agents from x402.shizu.me, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns all liquid Polymarket prediction markets above a configurable volume floor, with live Yes probabilities, edge scores, 24h volume, and liquidity — designed for continuous trading loops.

## Facts

- Endpoint: GET https://x402.shizu.me/pmscan
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/live-prediction-market-surface-polymarket-cac56951
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GpeNl9YiedOrXdI7_1bKd

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 live-prediction-market-surface-polymarket-cac56951
```

Example prompt: Pull the live Polymarket surface right now — show me the top 25 markets sorted by edge, only the ones that aren't near-resolved, with a minimum 24h volume of $2000.

## When to prefer this

Choose this endpoint when you need a comprehensive, filtered, and sorted view of the entire tradeable Polymarket surface in a single call — especially for trading bots that need to scan all liquid markets at once rather than look up a specific market. Prefer over the sibling 'Prediction Market Odds' endpoint when you need edge scoring, volume/liquidity filtering, and are building a continuous polling loop rather than a one-shot odds check.

## Known failure modes

- Polymarket API unavailable — returns upstream error
- min_volume or limit out of accepted range — returns validation error
- uncertain_only with very high min_volume may return empty list if no markets qualify
- Stale cache risk if polling interval is too long — data is only fresh at call time

## How this service works

The live TRADEABLE prediction-market surface, normalised for polling bots. Every liquid Polymarket market above a 24h-volume floor, each with its Yes probability, `edge` (min(yes,1-yes) — 0=resolved, 0.5=coin-flip), 24h volume, and liquidity. Query: min_volume (USD floor, default 1000), uncertain_only (true drops near-resolved), sort (volume|edge|liquidity), limit (1-100). Prices move — poll it; a cached copy is stale. Built for continuous trading loops, not one-shot lookups.

## Output

A ranked list of Polymarket markets each containing: market title, current Yes probability, edge score (min(yes, 1-yes) where 0=resolved and 0.5=coin-flip), 24h USD trading volume, and available liquidity — fresh live data, not cached.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "method"
   ],
   "properties": {
    "method": {
     "const": "GET"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "min_volume",
      "sort",
      "limit"
     ],
     "properties": {
      "sort": {
       "type": "string"
      },
      "limit": {
       "type": "string"
      },
      "min_volume": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 40,
  "venue": "polymarket",
  "markets": [
   {
    "url": "https://polymarket.com/event/...",
    "yes": 0.34,
    "edge": 0.34,
    "ends": "2026-12-31T00:00:00Z",
    "question": "Will X happen by 2027?",
    "liquidity": 455381,
    "volume_24h": 254637
   }
  ],
  "scanned": 399
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/live-prediction-market-surface-polymarket-cac56951/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.shizu.me](https://www.zero.xyz/host/x402.shizu.me/llms.txt)