# prediction-intel Polymarket Markets Feed

> prediction-intel Polymarket Markets Feed is a paid API for AI agents from prediction-intel-tan.vercel.app, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-16).

Fetches live Polymarket prediction market listings filtered by tag, limit, and sort order for AI agent consumption

## Facts

- Endpoint: GET https://prediction-intel-tan.vercel.app/api/markets
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/prediction-intel-polymarket-markets-feed-a486b68c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7VnbZ-Rbt7mYLQk_pLZXv

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 prediction-intel-polymarket-markets-feed-a486b68c
```

Example prompt: Pull the top 10 Polymarket prediction markets tagged 'crypto', sorted by 24-hour volume, so I can see where the action is right now.

## When to prefer this

Use this endpoint when you need real-time Polymarket prediction market data for AI agents, especially when you want to filter by topic (crypto, politics, sports), control result count, and sort by trading activity. Prefer this over manual Polymarket scraping or general search when you need structured, pay-per-call data payable in USDC via x402 on Base.

## Known failure modes

- Invalid tag slug returns empty results or error
- Limit out of range (outside 1-50) may return error or default
- Payment failure due to insufficient USDC balance on Base returns 402
- Unavailable upstream Polymarket data may cause timeout or 503
- Invalid sort field may default or return error

## How this service works

Pay-per-call crypto/web3 data for AI agents. USDC via x402 on Base.

## Output

A list of up to 50 Polymarket prediction markets including market names, current odds, 24-hour trading volume, tags, and other metadata relevant for analysis or display.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "tag": {
   "type": "string",
   "description": "Tag slug filter e.g. crypto, politics, sports, bitcoin."
  },
  "limit": {
   "type": "number",
   "description": "Max markets (1-50, default 20)."
  },
  "order": {
   "type": "string",
   "description": "Sort field, default volume24hr."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/prediction-intel-polymarket-markets-feed-a486b68c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from prediction-intel-tan.vercel.app](https://www.zero.xyz/host/prediction-intel-tan.vercel.app/llms.txt)