AI tools / Prediction Market Data API

Read live odds across every prediction venue at once

Prediction-market odds and resolution data across Polymarket, Kalshi and more on one endpoint. Billed per call in USDC, with no venue accounts to maintain.

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What it does

Market and event lists, trades, orderbook snapshots, candlesticks, volume and open-interest history and positions for Polymarket and Kalshi; market lists and orderbook history for Limitless, Opinion and Predict.Fun; a cross-venue search that matches the same event across all of them; and UMA oracle state for Polymarket resolutions. Wallet analytics — leaderboards, per-wallet P&L and positions, smart-money positioning, identity and cluster lookups — sit on the same prefix.

Every endpoint is one request billed at a flat per-call rate whichever tier it belongs to. List endpoints paginate by offset or by keyset cursor, and the table below shows the query parameters the markets list accepts. Path parameters such as a condition id come from the list endpoints.

The call

One endpoint, priced in dollars before it runs and settled in USDC. No API key and no account — the request pays for itself.

GET /api/v1/pm/polymarket/markets
Host: blockrun.ai

Request parameters

field	type	description
status	string	Filter by market status (e.g. "open", "closed").
min_price	number
max_price	number
min_open_interest	number
min_volume	number
tags	string	Filter by Polymarket tag(s).
event_slug	string	Event slug(s). The slug filter for /markets is `event_slug` (or `market_slug`), NOT `slug`.
search	string	Free-text search over market/question text (min 3 chars). Note: this param is `search` here, NOT `q` — only /markets/search uses `q`.
condition_id	string	Polymarket condition ID(s).
question_id	string
market_id	string
market_slug	string	Market slug(s).
token_id	string
predexon_id	string	Canonical cross-venue Predexon ID(s).
end_after	integer	Only markets ending after this unix timestamp (seconds).
end_before	integer	Only markets ending before this unix timestamp (seconds).
sort	string	Sort order for results.
limit	integer	Max results to return (default 20, max 100).
pagination_key	string	Opaque cursor from a prior response for keyset pagination.
offset	integer	Deprecated — use pagination_key.
min_volume_1d	number
min_volume_7d	number
min_volume_30d	number
min_trades_1d	integer
min_trades_7d	integer
min_trades_30d	integer

* required

What it covers

polymarket29 endpoints

polymarket/markets · polymarket/markets/keyset · polymarket/events

kalshi3 endpoints

kalshi/markets · kalshi/trades · kalshi/orderbooks

binance2 endpoints

binance/candles/:symbol · binance/ticks/:symbol

matching1 endpoint

markets/search

limitless2 endpoints

limitless/markets · limitless/orderbooks

opinion2 endpoints

opinion/markets · opinion/orderbooks

predictfun2 endpoints

predictfun/markets · predictfun/orderbooks

uma2 endpoints

polymarket/uma/markets · polymarket/uma/market/:condition_id

wallet3 endpoints

polymarket/wallet/identity/:wallet · polymarket/wallet/identities · polymarket/wallet/:address/cluster

What it costs

endpointmethodmethodprice

See every endpoint → · 36 more

Why per call

No seat, no minimum, no contract per vendor. Each request is quoted in dollars before it runs and settles on-chain, so an agent can pay for its own work without a human holding a credit card. How the payment works →

Related tools

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Crypto Price API

Web Search API

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Questions

Which venues are covered?

Polymarket and Kalshi among others, with canonical cross-venue markets so the same event lines up across them.

Is this trading or data?

Data. It reads odds, markets and resolutions; it does not place positions.

How is it billed?

Per call in USDC at the rate on this page, with no venue account or key required.

How fresh are the odds?

They are read live from each venue at request time rather than served from a daily snapshot.