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Polymarket Market Search
x402
Polymarket Market Search is a paid API for AI agents from agent402.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Searches active Polymarket prediction markets by keyword, returning top matches sorted by 24h volume with prices, probabilities, liquidity, and CLOB token IDs.
Price / call$0.002
Success—
StatusUnknown
How this service works
Search active Polymarket markets by keyword. Returns the top matches sorted by 24h volume, with question, current outcome prices (implied probabilities), volume, liquidity, end date, and CLOB token ids for orderbook lookups.
Output
Returns a ranked list of matching Polymarket markets (up to the requested limit), each with the market question, current outcome prices as implied probabilities, 24-hour trading volume, available liquidity, market end date, and CLOB token IDs that can be used for orderbook lookups.
Example use cases
Example prompt
“Search Polymarket for active markets about the 2024 US presidential election and show me the top 5 results sorted by volume, including current odds and liquidity.”
Technical details
Endpoint
POSThttps://agent402.tools/api/polymarket-searchWhen to prefer
Use this endpoint when you need to discover and evaluate Polymarket prediction markets by topic or keyword, especially when you want current implied probabilities and liquidity metrics sorted by recent trading activity. Ideal for agents building trading strategies, monitoring event probabilities, or surfacing relevant markets for a given news topic. Prefer this over manual Polymarket browsing when you need CLOB token IDs for subsequent orderbook queries.
Side effects
- No markets found for obscure or misspelled keywords — returns empty results
- Query too broad returns irrelevant markets ranked by volume
- Market data may be stale if Polymarket API is slow or rate-limited
- Limit parameter outside 1-50 range may cause validation error
- Payment failure (402) if USDC balance insufficient for $0.002 call cost
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | number | Max markets to return (1-50, default 10). |
| query | string | Keyword to search market questions, slugs, and descriptions. |
| activeOnly | boolean | Filter to active+open markets only (default true). |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 1,
"query": "election",
"source": "polymarket-gamma",
"markets": [
{
"id": "12345",
"slug": "will-x-win-election",
"venue": "polymarket",
"active": true,
"closed": false,
"prices": [
0.62,
0.38
],
"volume": 1234567.89,
"endDate": "2026-11-03T23:59:00Z",
"outcomes": [
"Yes",
"No"
],
"question": "Will X win the election?",
"venueUrl": "https://polymarket.com/market/will-x-win-election",
"clobTokenIds": [
"7290..."
]
}
],
"scannedMarkets": 57,
"searchExhausted": false,
"searchedKeywordIndex": true
}
}Tags
x402
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