# DF Market Intelligence – Top Prediction Markets

> DF Market Intelligence – Top Prediction Markets is a paid API for AI agents from df-data-agent.vercel.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-28).

Returns the highest-volume live prediction markets from Polymarket and Kalshi with implied probabilities, 24h change, volume, and close time, refreshed every 15 minutes.

## Facts

- Endpoint: GET https://df-data-agent.vercel.app/api/v1/predictions/top?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/df-market-intelligence-top-prediction-markets-3d172d37
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W6YwoFCrZUzmU5yi-FB_y

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 df-market-intelligence-top-prediction-markets-3d172d37
```

Example prompt: Show me the top 25 prediction markets by volume right now across both Polymarket and Kalshi — I want the implied probabilities, 24h change, and when each market closes.

## When to prefer this

Use this endpoint when you need a broad, ranked overview of the most actively traded prediction markets across both Polymarket and Kalshi in a single call, rather than querying each exchange separately. Prefer it over exchange-specific APIs when you want cross-platform volume rankings or don't know which platform has the most relevant market for a given topic.

## Known failure modes

- limit out of range (must be 1–100) returns validation error
- invalid source enum value returns error
- downstream Polymarket or Kalshi data unavailable causes stale or empty results
- payment failure ($0.005 USDC) returns 402 Payment Required

## How this service works

Highest-volume live prediction markets across Polymarket and Kalshi with implied probabilities, 24h change, volume and close time. Refreshed every 15 minutes.

## Output

A ranked list of up to 100 prediction markets (default 25) drawn from Polymarket and/or Kalshi, each with market name, implied probability, 24-hour probability change, trading volume, data source, and market close time. Data is refreshed every 15 minutes.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "limit": {
       "type": "integer",
       "description": "1-100, default 25"
      },
      "source": {
       "enum": [
        "polymarket",
        "kalshi"
       ],
       "type": "string",
       "description": "Optional: polymarket or kalshi"
      }
     }
    }
   },
   "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/df-market-intelligence-top-prediction-markets-3d172d37/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from df-data-agent.vercel.app](https://www.zero.xyz/host/df-data-agent.vercel.app/llms.txt)