Prediction markets API

Newest trades across every prediction market

The live, cross-venue tape: every prediction-market trade as it fills, newest first, optionally narrowed to one venue.

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

Get a free API key Try it in the API reference

What it returns

Every prediction-market trade, polymarket and kalshi interleaved by time, newest first — the whole live feed, not one market's tape (that is prediction-trades, keyed on one market id). There is no market or trader filter, only exchange. Only the HEAD of the feed is reachable: there is no cursor or offset, because the source has none that actually pages — a caller who needs the trades AFTER what one response holds has no way to reach them today. marketTitle and eventTitle are resolved from this page's own side-loaded directories and are null when a trade's market or event did not appear there, which is most of them. The trader address, trader username, transaction hash, and event id, slug and image are populated on polymarket only; the yes/no prices (plain, as dollars, and fixed-point), the fixed-point quantity, and the fill count are populated on kalshi only — null on the other venue, never a fabricated zero or empty string.

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"

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 Newest trades across every prediction market
Field	Type	Description
`rows`	object[]	Newest first, after the `exchange` filter and then `limit`.
`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.

Recent prediction trades brief: the newest fills across venues
The same answer in a compact response
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.
Which prediction markets, events or traders match this text?
The ids found here are the ones the live trade feed names its markets and events by.
Is each prediction venue open and trading right now?
A venue whose trades stop arriving may simply be closed or in maintenance.
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.

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