Prediction Markets Search API
Query Polymarket and Kalshi contracts on politics, economics, sports, and current events. Pre-shaped JSON for crowd-forecast retrieval and probability grounding in LLM workflows.
What is Prediction Markets Search API?
Semantic search over Polymarket and Kalshi prediction-market contracts. Returns market titles, summaries, and source URLs.
- Endpoint
- POST /api/search/prediction-markets
- Authentication
- API key · x-api-key header
- Cost
- 50 credits / call
- Rate limit
- 30 req / min
- Response
- Structured JSON
Try Prediction Markets Search Live
Enter your API key and run a real query against the live endpoint.
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Integration guide
Copy a snippet, replace your API key, run. Works in any HTTP client — examples below in cURL, JavaScript, and Python.
/api/search/prediction-marketshttps://www.apipick.comSemantic search over Polymarket and Kalshi prediction-market contracts. Returns market titles, summaries, and source URLs.
querystringrequiredNatural-language search query
max_num_resultsintegeroptional1–5, default 5
relevance_thresholdnumberoptional0.0–1.0 quality filter
country_codestringoptionalISO country code (e.g. US, GB)
start_datestringoptionalISO date YYYY-MM-DD
end_datestringoptionalISO date YYYY-MM-DD
curl -X POST "https://www.apipick.com/api/search/prediction-markets" \
-H "Content-Type: application/json" \
-H "x-api-key: YOUR_API_KEY" \
-d '{
"query": "2026 US presidential election",
"max_num_results": 5,
"country_code": "US",
"start_date": "2026-01-01"
}'{
"query": "2026 US presidential election",
"results": [
{
"title": "Example result",
"url": "https://example.com/article",
"snippet": "Short excerpt of the page content…",
"source_type": "web",
"published_at": "2026-04-15",
"score": 0.92
}
],
"result_count": 1,
"credits_used": 50,
"remaining_credits": 99
}Rate limits
Throttling is per API key, sliding 60-second window. Hit the limit and you get a clean 429 with a Retry-After header.
30req/min
Per API key, per endpoint. Sliding 60-second window.
3concurrent
Max simultaneous in-flight requests per API key.
X-RateLimit-LimitMaximum requests allowed per minuteX-RateLimit-RemainingRequests remaining in the current windowX-RateLimit-ResetSeconds until the current window resetsRetry-AfterSeconds to wait before retrying (only on 429)HTTP/1.1 429 Too Many Requests
Retry-After: 12
X-RateLimit-Limit: 30
X-RateLimit-Remaining: 0
X-RateLimit-Reset: 12
{
"error": "rate_limit_exceeded",
"message": "Rate limit exceeded: 30 requests/minute per API key. Retry after 12s.",
"retry_after": 12
}Frequently Asked Questions
Which markets are covered?
Polymarket (decentralized, USDC-settled) and Kalshi (CFTC-regulated). Both live and resolved markets are searchable.
Are live odds returned?
Results include market metadata and source URLs. For real-time prices, follow the source URL or the market's native API. The endpoint is optimized for retrieval and discovery, not high-frequency quotes.
Why use this instead of going direct?
One endpoint, one auth flow, semantic search across both platforms, and unified credit billing. Useful when an agent needs to ground a probabilistic claim without integrating two separate APIs.
Date filtering?
Yes. start_date / end_date filter markets by listing or resolution date.
Tool schema?
GET /api/search/prediction-markets/tool-schema returns OpenAI and Claude tool-use definitions.
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