# x402 Trending Prediction Markets

> x402 Trending Prediction Markets is a paid API for AI agents from x402-services-production.up.railway.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns the highest-volume live prediction markets currently being actively priced by the crowd

## Facts

- Endpoint: POST https://x402-services-production.up.railway.app/api/predict/trending
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-trending-prediction-markets-fc519566
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6IBYXKEG7c0jyHJc-EWCt

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 x402-trending-prediction-markets-fc519566 -d '<json body>'
```

Example prompt: What are the top 20 prediction markets the crowd is most actively trading right now? Give me the trending ones with the most volume.

## When to prefer this

Use this endpoint when you need a broad snapshot of what the prediction market crowd is focused on right now, without knowing specific market slugs in advance. Prefer this over the slug-specific Polymarket endpoint when you want discovery rather than lookup of a known market. Best for surfacing high-signal events that are actively being priced.

## Known failure modes

- Invalid limit value (non-numeric or negative) may return an error or default to 10
- Upstream prediction market data unavailable may return empty results or 503
- If no markets are currently trending, returns an empty list
- Payment failure (x402) results in 402 response before data is returned

## How this service works

Highest-volume live prediction markets — what the crowd is actively pricing right now. Send { limit? }.

## Output

A ranked list of the highest-volume live prediction markets, including market titles, outcome probabilities as priced by the crowd, trading volume, and liquidity — showing what questions the market is most actively pricing at this moment.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "number",
   "description": "Max markets, default 10"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-trending-prediction-markets-fc519566/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-services-production.up.railway.app](https://www.zero.xyz/host/x402-services-production.up.railway.app/llms.txt)