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Polymarket Prediction Market Odds via Crypto Microdata
x402
Polymarket Prediction Market Odds via Crypto Microdata is a paid API for AI agents from kr-x402-mvp.kgy5612.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-31).
Fetches live Polymarket prediction-market events with implied probabilities, bid/ask spreads, and 24h volume for any keyword, sorted by trading activity
Price / call$0.003
Success—
StatusUnknown
How this service works
Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.
Output
A JSON object with a list of Polymarket events matching the keyword query, each containing the event title, end date, total liquidity, and 24h volume, plus an array of individual markets sorted with contested (5-95% probability) ones first. Each market includes the question text, outcome label, yes_prob, no_prob, best_bid, best_ask, 1-day change, volume_24h, liquidity, and a direct Polymarket URL. Also includes a top_contested field highlighting the single most-traded genuinely uncertain market across all results, plus metadata (source, event count, updated_at timestamp).
Example use cases
Crypto trading signal from prediction markets
“Pull the live Polymarket implied probabilities for ethereum price events — show me 6 events with up to 6 markets each so I can see where the market thinks ETH is headed this month.”
Macro event odds for portfolio hedging
“What does Polymarket currently say about the fed rate decision? Give me the top 4 events with 6 markets each, and flag which ones are genuinely contested so I know where uncertainty is highest.”
Election outcome probability check
“Search Polymarket for election prediction markets and return 10 events with up to 8 markets each — I want the yes/no probabilities, 24h volume, and which markets are the most actively traded right now.”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/crypto/prediction-markets?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need live, clean implied probabilities from Polymarket rather than raw exchange price feeds — ideal for agents that need to understand market consensus on future events (price targets, macro decisions, elections) rather than current spot prices. Prefer this over manual Polymarket scraping or general crypto price endpoints when the use case is event-driven probability, not OHLCV data.
Side effects
- Keyword returns no matching events — empty events array with n_events:0
- Polymarket API upstream outage — stale or unavailable data
- limit or markets parameter out of range (1-20) — validation error
- Rate limiting or x402 payment failure — 402 response requiring USDC payment on Base
- Very low-volume keywords may return fewer events than requested limit
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"q": "bitcoin",
"events": [
{
"url": "https://polymarket.com/event/bitcoin-above-on-october-30",
"title": "Bitcoin above ___ on October 30?",
"markets": [
{
"no_prob": 0.38,
"best_ask": 0.63,
"best_bid": 0.61,
"question": "Will the price of Bitcoin be above $80,000 on October 30?",
"yes_prob": 0.62,
"change_1d": 0.05,
"contested": true,
"liquidity": 50000,
"volume_24h": 41000,
"outcome_label": "80,000"
}
],
"end_date": "2026-10-30T16:00:00Z",
"liquidity": 610000,
"volume_24h": 281751.88
}
],
"source": "polymarket",
"n_events": 1,
"updated_at": "2026-10-29T15:30:00Z",
"top_contested": {
"event": "Bitcoin above ___ on October 30?",
"question": "Will the price of Bitcoin be above $80,000 on October 30?",
"yes_prob": 0.62,
"volume_24h": 41000
}
}
}Tags
x402
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