# Trending Prediction Markets

> Trending Prediction Markets is a paid API for AI agents from www.x402financialdata.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns the top active prediction markets on Polymarket ranked by 24-hour trading volume, with no keyword required.

## Facts

- Endpoint: GET https://www.x402financialdata.com/trending-markets
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/trending-prediction-markets-cff1d9a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_h17MmeFM81Z8QlON9K1-J

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 trending-prediction-markets-cff1d9a8
```

Example prompt: What are the top 15 trending prediction markets on Polymarket right now, ranked by 24-hour trading volume?

## When to prefer this

Use this endpoint when you have no specific keyword or market ID in mind and want to discover what's currently popular on Polymarket by trading activity. Prefer this over /prediction-markets (keyword search) when the user asks broadly about 'what's trending' or 'what's hot' without naming a specific topic, and prefer it over /prediction-market (exact-ID lookup) when you don't already know the market ID.

## Known failure modes

- limit parameter exceeds 25 — clamped or rejected with validation error
- Polymarket data temporarily unavailable — upstream timeout or empty response
- Invalid limit type (non-integer) — schema validation error
- Payment not processed — 402 payment required error if x402 payment header missing

## How this service works

Top active prediction markets by 24h trading volume on Polymarket -- what's trending right now, no keyword needed. Pairs with /prediction-markets (keyword search) and /prediction-market (exact-ID lookup): use this one when you don't already know what to search for. Not ticker-specific. Supports optional limit (default 10, max 25). $0.01/call.

## Output

Returns a ranked list of up to 25 prediction markets (default 10) ordered by 24-hour trading volume, including market names, IDs, current odds, volume figures, and close dates sourced live from Polymarket.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "limit": {
       "type": "integer",
       "description": "Max markets to return, default 10, max 25."
      }
     }
    }
   },
   "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/trending-prediction-markets-cff1d9a8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.x402financialdata.com](https://www.zero.xyz/host/www.x402financialdata.com/llms.txt)