# x402-factory World Series Winner Probability (Evergreen)

> x402-factory World Series Winner Probability (Evergreen) is a paid API for AI agents from x402-factory.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-18).

Returns the current consensus probability for who will win the next World Series, auto-rolling to the next season's market upon resolution.

## Facts

- Endpoint: GET https://x402-factory.com/v1/evergreen/world-series-winner?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-factory-world-series-winner-probability-evergreen-3c07a736
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_myr8M5_rYWNQpU5KFOfnS

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-factory-world-series-winner-probability-evergreen-3c07a736
```

Example prompt: What's the current market probability for who wins the next World Series — pull the latest aggregated odds from prediction markets including how much the probability has moved in the last hour?

## When to prefer this

Use this endpoint when you need a stable, evergreen URL for World Series winner odds that automatically points to the current season's market without needing to update slugs or track resolution events. Prefer this over raw Kalshi/Polymarket APIs when you want a single aggregated probability across venues with built-in roll-forward behavior and divergence signals.

## Known failure modes

- No active market found if MLB season is off-cycle or market hasn't opened yet
- Stale data if underlying Kalshi/Polymarket markets have low liquidity
- Payment failure (402) if USDC balance is insufficient
- Resolution lag where rolls_to_next_at has passed but new market hasn't been instantiated yet
- Divergence field may be 0 if only one venue has an active market

## How this service works

Live probability: Who wins the next World Series? — Stable evergreen URL for a recurring question: Who wins the next World Series? Auto-resolves to the current market instance and rolls forward on resolution, so the answer is always about the next occurrence. Response adds current_slug and rolls_to_next_at to the standard probability shape.

## Output

Returns a JSON object with: aggregate consensus probability (0-1) for the leading team or market, per-venue breakdown from Kalshi and Polymarket (implied probability, 24h volume, liquidity score), divergence between venues, last 1-hour probability move, resolution date, resolution criteria summary, the current market slug, and a rolls_to_next_at timestamp indicating when this evergreen URL will advance to the next World Series market.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "slug": "dodgers-win-world-series-2026",
   "topic": "world-series-winner",
   "category": "sports",
   "question": "Will the Dodgers win the 2026 World Series?",
   "per_venue": [
    {
     "venue": "kalshi",
     "implied_p": 0.2228,
     "market_id": "KXDODGERSWINWORL",
     "volume_24h_usd": 276650.13,
     "liquidity_score": 0.947
    },
    {
     "venue": "polymarket",
     "implied_p": 0.2536,
     "market_id": "dodgers-win-world-series-2026",
     "volume_24h_usd": 93103.56,
     "liquidity_score": 0.926
    }
   ],
   "divergence": 0.0308,
   "probability": 0.2359,
   "current_slug": "dodgers-win-world-series-2026",
   "last_move_1h": 0.0029,
   "topic_question": "Who wins the next World Series?",
   "resolution_date": "2026-11-01",
   "rolls_to_next_at": "2026-11-01",
   "resolution_criteria_summary": "Resolves YES if Los Angeles wins the 2026 World Series."
  },
  "meta": {
   "docs": "https://x402-factory.com/docs/probability.evergreen.world-series-winner",
   "sources": [
    "kalshi",
    "polymarket"
   ],
   "version": "1.0.0",
   "endpoint": "/v1/evergreen/world-series-winner",
   "data_mode": "live",
   "freshness": "realtime",
   "request_id": "req_00000000",
   "generated_at": "2026-08-21T03:58:58.100Z"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-factory-world-series-winner-probability-evergreen-3c07a736/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-factory.com](https://www.zero.xyz/host/x402-factory.com/llms.txt)