Prediction markets API

Recent prediction trades brief: the newest fills across venues

The newest 20 trades across every prediction market, optionally one venue, with the count per venue.

GET/api/external/prediction/prediction-trades-recent-brief

Get a free API key Try it in the API reference

What it returns

The brief of prediction-trades-recent; prefer it unless you need more than the newest 20 trades. The same query: limit and exchange. It lists the newest 20 of the rows prediction-trades-recent answers, each exactly as it lists it, with how many rows that answer holds and how many per venue; a limit above 20 still lists 20.

Chains

This endpoint is not tied to a chain: it takes no chain in its request.

Request

Send your key in the x-dex-data-key header. Replace each <placeholder> with a real value.

curl -H "x-dex-data-key: $DEXDATA_API_KEY" \
  "https://api.dexdata.io/api/external/prediction/prediction-trades-recent-brief"

Parameters
Parameter	Description
`limit` query · integer · optional	How many rows to return, after the `exchange` filter. Defaults to 50; at most 1000 — the source's own page ceiling.
`exchange` query · string · optional	Keep only one venue's trades, e.g. "polymarket" or "kalshi". Case-insensitive. A venue with no matching trades on the current page answers an empty list.

Response fields

A JSON response. Every field is always present; null means the value could not be established, never zero.

Response fields of Recent prediction trades brief: the newest fills across venues
Field	Type	Description
`rowCount`	integer	Rows in the full answer, after `exchange` and `limit`.
`exchanges`	object[]	Rows in the full answer per venue, in the order the venues first appear.
`exchanges[].exchange`	string	The venue, as the rows name it.
`exchanges[].tradeCount`	integer	The venue's rows in the full answer.
`rows`	object[]	The newest 20 rows, newest first, each exactly as `prediction-trades-recent` lists it.
`rows[].exchange`	string \| null	The venue that filled this trade, e.g. `polymarket` or `kalshi`. Open set: new venues can appear.
`rows[].id`	string \| null	This trade's id on its venue.
`rows[].marketId`	string \| null	The market traded, in its venue's own id space.
`rows[].timestamp`	number \| null	Unix seconds, when the trade filled.
`rows[].side`	string \| null	The side filled, e.g. `yes`, `no`, `sell`. Open set: new values can appear.
`rows[].price`	number \| null	Price per share/contract, 0 to 1.
`rows[].quantity`	number \| null	Shares/contracts traded.
`rows[].outcomeIndex`	number \| null	Which outcome of the market this trade is on (0-indexed).
`rows[].outcomeLabel`	string \| null	The outcome traded, e.g. `Yes`, `MOUZ`.
`rows[].groupItemTitle`	string \| null	The sub-market label inside a multi-outcome event, e.g. `"75+"`, `"Tie"`. Null when the market has none.
`rows[].marketTitle`	string \| null	The market's title, resolved from this page's own side-loaded market directory. Null when this trade's market did not appear in it.
`rows[].eventTitle`	string \| null	The event's title grouping this market, when known. Null when it cannot be resolved.
`rows[].traderAddress`	string \| null	The trader's wallet address. Populated on `polymarket` only; null elsewhere.
`rows[].traderUsername`	string \| null	The trader's chosen display name, when they set one. Populated on `polymarket` only; null elsewhere, including a `polymarket` trader who set none.
`rows[].txHash`	string \| null	The on-chain transaction hash. Populated on `polymarket` only; null elsewhere.
`rows[].eventId`	string \| null	The event id this trade's market belongs to. Populated on `polymarket` only; null elsewhere.
`rows[].eventSlug`	string \| null	The event's URL slug. Populated on `polymarket` only; null elsewhere.
`rows[].image`	string \| null	An image representing the market or event. Populated on `polymarket` only; null elsewhere.
`rows[].yesPrice`	number \| null	The `Yes` side's implied price, 0 to 1. Populated on `kalshi` only; null elsewhere.
`rows[].noPrice`	number \| null	The `No` side's implied price, 0 to 1. Populated on `kalshi` only; null elsewhere.
`rows[].yesPriceDollars`	string \| null	`yesPrice` as a decimal-string dollar amount. Populated on `kalshi` only; null elsewhere.
`rows[].noPriceDollars`	string \| null	`noPrice` as a decimal-string dollar amount. Populated on `kalshi` only; null elsewhere.
`rows[].yesPriceE6`	number \| null	`yesPrice` scaled by 1e6 (fixed-point). Populated on `kalshi` only; null elsewhere.
`rows[].quantityE2`	number \| null	`quantity` scaled by 1e2 (fixed-point). Populated on `kalshi` only; null elsewhere.
`rows[].countFp`	string \| null	The fill count, as this venue's own fixed-point decimal string. Populated on `kalshi` only; null elsewhere.

Price per call

Every call: 18 credits

Charged only when the call succeeds. Prices as of 2026-10-30; the current ones are always in the API reference.

Newest trades across every prediction market
The full answer this one condenses
Latest trades and redemptions on one prediction market
Every market's newest trades in one feed, against one market's own full tape.
Prediction markets, ranked by volume, liquidity or open interest
A trade names its market by id; look the market up there for its question and odds.
Is each prediction venue open and trading right now?
Per venue: whether its exchange and its trading are active right now, and its published trading hours. Read it before placing an order or when trades stop arriving.
How much is trading on prediction venues, per venue and combined?
Per venue and combined: 24-hour and all-time volume (contracts on kalshi, USD on polymarket), trade count, active and total markets, and unique traders where reported. No open interest.
Which prediction markets, events or traders match this text?
Free-text search across prediction venues: matching markets, events and traders, with ids and close dates. Identity only, no prices or volume.

Start building with DexData today

Sign in, create a key and make your first call in a minute. Free credits every month, and you only pay for calls that succeed.

Get a free API key