# Polymarketeer Kalshi Trending Markets

> Polymarketeer Kalshi Trending Markets is a paid API for AI agents from polymarketeer.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns Kalshi prediction markets sorted by 24-hour trading volume to surface the most actively traded markets

## Facts

- Endpoint: POST https://polymarketeer.vercel.app/api/x402/kalshi/markets/trending
- 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/polymarketeer-vercel-app-c4ebccfb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZtwGwiuSD_buETc8Ak15l

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 polymarketeer-vercel-app-c4ebccfb -d '<json body>'
```

Example prompt: What are the most actively traded Kalshi prediction markets right now — show me the ones with the highest 24-hour trading volume?

## When to prefer this

Use this endpoint when you need to discover which Kalshi prediction markets are currently most active by trading volume — ideal for trend monitoring, market research, or identifying high-liquidity contracts. Prefer this over keyword search when you don't have a specific topic in mind and want to discover what traders are focused on right now.

## Known failure modes

- Kalshi API unavailable — upstream data fetch fails
- No markets returned if Kalshi has no recent trading data
- Payment failure if x402 USDC payment is not properly submitted
- Rate limiting if called too frequently
- Stale data if Kalshi volume data has not refreshed recently

## How this service works

Get trending Kalshi markets sorted by 24-hour trading volume

## Output

A ranked list of Kalshi prediction markets sorted by 24-hour trading volume, including market tickers, titles, and volume metrics indicating which contracts are seeing the most recent trading activity.

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "data"
 ],
 "properties": {
  "data": {},
  "error": {
   "type": "string"
  }
 },
 "additionalProperties": false
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/polymarketeer-vercel-app-c4ebccfb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from polymarketeer.vercel.app](https://www.zero.xyz/host/polymarketeer.vercel.app/llms.txt)