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Polymarket Odds Lookup
x402
Polymarket Odds Lookup is a paid API for AI agents from aiworker.duckdns.org, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Returns real-time Polymarket prediction market odds, volume, liquidity, and 24h/7d price changes for a specified market
Price / call$0.01
Success—
StatusUnknown
How this service works
Deterministic-first data for agents, paid per call in USDC over x402 v2: DeFi yields, Base token and wallet cards, Polymarket odds and backtests, news, fact checks, cited briefs. 20 routes, $0.005-$1
Output
Returns a JSON object with the matched market's question, slug, condition ID, open/closed/resolved status, end date, and a full odds block including yes price, no price, implied probability percent, 24h price change, 7d price change, last trade price, USD volume, and USD liquidity. Also includes query metadata (kind: slug/condition_id/search/text), data cutoff timestamp, and attribution disclaimer. If no exact match is found, returns a candidates list of similar markets.
Example use cases
Election probability check
“What does Polymarket currently say about the odds of Trump winning the 2024 election — show me the yes price, implied probability, and any movement in the last week?”
Political leadership market monitor
“Pull up the Polymarket market on whether Xi Jinping will be out before 2027 and tell me the current yes/no odds, volume, and liquidity.”
Event resolution status lookup
“Is the Polymarket market on Fed rate cuts for 2025 still open or has it resolved? And what are the latest odds if it's still trading?”
Technical details
Endpoint
GEThttps://aiworker.duckdns.org/v1/polymarket/oddsWhen to prefer
Use this endpoint when you need current Polymarket prediction market odds for a specific event, especially when you have a known slug or condition ID. Prefer this over general web search when you need structured probability data (yes/no prices, volume, liquidity, price deltas) suitable for programmatic use. The $0.01 per-call price makes it cost-effective for single market lookups. Best when the user wants a precise implied probability figure or wants to track price movement over 24h or 7d windows.
Side effects
- Market not found by slug or condition ID — returns status: not_found with candidates list
- Free-text search returns ambiguous candidates — agent must refine query or select from candidates
- Market is closed or resolved — odds block may be null or historical
- Payment not completed — 402 response before data is returned
- Market slug too short (under 3 chars) — schema validation error
- Network or upstream Polymarket data outage — may return stale data_cutoff
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"odds": {
"no": 0.9615,
"yes": 0.0385,
"as_of": "2026-09-11T00:00:00.000Z",
"change_7d": -0.003,
"change_24h": -0.0005,
"last_trade": 0.038,
"volume_usd": 13121236.14,
"liquidity_usd": 412530.12,
"implied_probability_pct": 3.85
},
"query": {
"kind": "slug",
"value": "xi-jinping-out-before-2027"
},
"market": {
"id": "559651",
"slug": "xi-jinping-out-before-2027",
"closed": false,
"end_date": "2027-01-01T04:59:00.000Z",
"question": "Xi Jinping out before 2027?",
"resolution": "open",
"condition_id": "0xa467b14d51f01b957109d9cbb1d6c124fab2a089d52ed8f471d23c2812e743b7"
},
"status": "open",
"disclaimer": "…",
"generation": 1,
"attribution": "…",
"data_cutoff": "2026-09-10",
"generated_at": "2026-09-11T00:00:00.000Z"
}
}Tags
x402
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