# Vextorium Polymarket Markets Explorer

> Vextorium Polymarket Markets Explorer is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-16).

Retrieves Polymarket prediction markets ranked by 24h volume, liquidity, or close date — or matching a keyword search — with implied probabilities, volume, liquidity, and close dates for each outcome.

## Facts

- Endpoint: POST https://api.vextorium.com/polymarket-mercados-pago?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-polymarket-markets-explorer-3c334f81
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZYmsmF9SrgVG6D-6XPpu-

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 vextorium-polymarket-markets-explorer-3c334f81 -d '<json body>'
```

Example prompt: Show me the top 10 Polymarket prediction markets right now sorted by 24h volume, including the implied probability for each outcome.

## When to prefer this

Use this endpoint when you need live, structured data from Polymarket prediction markets — including implied probabilities, volume rankings, and liquidity — for elections, sports, crypto, or macro events. Prefer this over scraping Polymarket directly or using generic search, as it returns structured probability data per outcome with sorting controls.

## Known failure modes

- No markets found for the search query — returns empty markets array
- Invalid sort order value — request rejected or falls back to default
- Polymarket API unavailable upstream — returns error or empty result
- Limit parameter too high — may return fewer results than requested

## How this service works

Open Polymarket prediction markets: top by 24h volume or liquidity, or matching a search (elections, crypto, sports, economy...), with the implied probability of each outcome, volume, liquidity and close date.

## Output

Returns a list of Polymarket prediction markets with: market question, outcome options with implied probability percentages, 24h volume in USD, total volume, liquidity in USD, 24h price change, close date/time, and a direct link to the market on Polymarket.com. Also includes a disclaimer note that probabilities are market-implied, not guaranteed predictions.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "orden": {
   "enum": [
    "volumen",
    "liquidez",
    "cierre"
   ],
   "type": "string"
  },
  "buscar": {
   "type": "string"
  },
  "limite": {
   "type": "integer"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "nota": "Probabilidades implícitas por el precio de mercado; no son predicciones garantizadas. Fuente: Polymarket.",
  "orden": "volumen",
  "busqueda": null,
  "mercados": [
   {
    "id": "4720686",
    "slug": "unl-bel-tur-2026-10-02-bel",
    "cierre": "2026-10-02T18:45:00Z",
    "enlace": "https://polymarket.com/market/unl-bel-tur-2026-10-02-bel",
    "pregunta": "Will Belgium win on 2026-10-02?",
    "cambio_24h": 0.32,
    "resultados": [
     {
      "opcion": "Yes",
      "probabilidad_pct": 95.5
     },
     {
      "opcion": "No",
      "probabilidad_pct": 4.5
     }
    ],
    "liquidez_usd": 60172,
    "volumen_24h_usd": 2587928,
    "volumen_total_usd": 2641418
   },
   {
    "id": "5180164",
    "slug": "dota2-og-bb4-2026-10-02",
    "cierre": "2026-10-02T22:45:00Z",
    "enlace": "https://polymarket.com/market/dota2-og-bb4-2026-10-02",
    "pregunta": "Dota 2: OG vs BetBoom Team (BO3) - BLAST Slam Group C",
    "cambio_24h": 0.56,
    "resultados": [
     {
      "opcion": "OG",
      "probabilidad_pct": 91
     },
     {
      "opcion": "BetBoom Team",
      "probabilidad_pct": 9
     }
    ],
    "liquidez_usd": 55273,
    "volumen_24h_usd": 1136462,
    "volumen_total_usd": 1125844
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-polymarket-markets-explorer-3c334f81/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)