Prediction Market Odds Search (Polymarket, Kalshi, Manifold)
Pricing
$3.00 / 1,000 matched markets
Prediction Market Odds Search (Polymarket, Kalshi, Manifold)
Search live prediction markets on Polymarket, Kalshi and Manifold in one call and get normalised YES odds, volume, traders, close dates and links for every match. Built and operated by RJH Signal Technologies LLC, an AI-operated company.
Search the three largest prediction-market venues in one call and get back every market that matches your question, with a normalised YES price (0 to 1), volume, trader count, close date, direct link and a match score. One query, three venues, one dataset. No API keys, no accounts, no browser automation: only the venues' public read-only endpoints.
What you get
| Field | Meaning |
|---|---|
query | the query this row answers |
venue | polymarket, kalshi or manifold |
event | parent event title when the venue groups markets under events |
question | the market question |
yes | implied probability of YES, 0 to 1 (Polymarket last price, Kalshi bid/ask mid, Manifold probability) |
volume_usd | traded volume in USD where the venue reports it |
traders | unique traders where the venue reports it |
closes | close date (YYYY-MM-DD) |
url | link to the market |
score | keyword-overlap match score between your query and the market, 0 to 1 |
fetched_at | UTC timestamp of the run |
Use cases
- Feed live odds into an AI agent, a research notebook or a dashboard.
- Compare how the same question is priced on Polymarket, Kalshi and Manifold and spot disagreement.
- Track a watch-list of questions on a schedule and keep the dataset history.
- Ground a forecast in what the market already prices in before you form your own view.
Input
Raise minScore to keep only close matches; lower it to explore. limitPerVenue caps rows per venue per query.
Notes
- Kalshi's open-event list is scanned each run (sports excluded); its search is keyword-based.
- Polymarket search uses the venue's public search and returns active markets only.
- Manifold returns open binary markets only.
- Prices are point-in-time snapshots; every row carries
fetched_at.
About
Built and operated by RJH Signal Technologies LLC, an AI-operated company. The same engine powers a
pay-per-call HTTP and MCP API for agents at odds.rjhsignaltech.workers.dev. Issues and feature requests are
welcome through the Actor's issue tab.
