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/api/v1/public/marketsGET
Paginated list of tracked markets on the 15-minute-delayed public tier.
Query Parameters
scope?"constituents" | "all"
constituents (default) returns only index constituents; all returns every tracked market.
Default: "constituents"
search?string
Case-insensitive word match over the market's question, description, series title, market ID, and market slug.
sort?"volume" | "ticker" | "price" | "open_interest" | "expiration"
Sort key.
Default: "volume"
sort_dir?"asc" | "desc"
Sort direction, asc or desc (default desc).
Default: "desc"
page?integer
Page number (1-based).
Default: 1
per_page?integer
Items per page (clamped to 500).
Default: 100Max: 500
status?string
Market status filter. Absent → tradable only (active); all → every status; unknown / pending / closed / resolved / expired → exact match. Other values 400.
category?string
Exact-match event category; CSV for multiple (matches ANY).
venue?string
Venue / platform filter (CSV), matched on the market_id prefix (e.g. kalshi,polymarket,polymarket-us,gemini). platform is an accepted alias.
platform?string
Alias for venue.
volume_min?number
Minimum per-market volume.
oi_min?number
Minimum per-market open interest.
expires_before?string
ISO date/datetime inclusive upper bound on end_date (a bare date snaps to end-of-day).
expires_after?string
ISO date/datetime inclusive lower bound on end_date (a bare date snaps to start-of-day).
exclude_categories?string
CSV of category substrings to exclude (case-insensitive substring match).
Response
200 · Paginated list of market summaries
data?object[]
Show item properties
market_id?string
Canonical identifier for the market, formed as <platform>:<venue ticker> (for example kalshi:SENATEPA-26-R). This is the id every other endpoint accepts, so use it rather than ticker when looking a market up.
ticker?string
The venue's own symbol for the market, without the <platform>: prefix. Not guaranteed unique across venues, so use market_id as the lookup key and display_ticker as the human-readable label.
display_ticker?string
Human-readable market label, Polymarket market slug when present, else the raw ticker.
platform?string
The venue that lists this market: kalshi, polymarket, polymarket-us, or gemini. It is also the prefix of market_id, and it determines what the volume and open interest figures are counted in (see the companion volume_unit, volume_24h_unit, and open_interest_unit fields).
question?string
The market's question, worded as the venue words it. When a venue supplies no title we fall back to the raw ticker, so this is never empty.
probability?numbernull
Implied yes-side probability on the 0-100 scale, where 48.5 means 48.5 percent. This is the market's latest traded price.
volume?numbernull
All-time traded volume as a contract/share count (Kalshi contracts, Polymarket shares), not dollars. Unit is in volume_unit.
volume_unit?object | null
Wire unit for volume. See QuantityUnit.
volume_24h?numbernull
Trailing 24h volume. Platform-native: Kalshi and Gemini contracts, Polymarket shares. Unit is in volume_24h_unit.
volume_24h_unit?object | null
Wire unit for volume_24h. See QuantityUnit.
open_interest?numbernull
Open interest: a Kalshi contract count; Polymarket's is USD. Unit is in open_interest_unit.
open_interest_unit?object | null
Wire unit for open_interest. See QuantityUnit.
status?string
Lifecycle state of the market: pending (listed, open_time still in the future), active (trading), closed (trading has ended, outcome not yet published), resolved (settled with a known outcome), expired (ended long ago and never settled by the venue), or unknown (the venue reported no status we recognize).
category?stringnull
Topic category of this market's parent event, normalized across venues (for example Politics, Sports, Crypto). Every market under the same event shares it.
is_constituent?boolean
True when the market is a constituent of at least one index. The public markets list exposes every tracked market; default to constituents by filtering on this flag.
indices?string[]
Index ids this market is a constituent of, ascending. Omitted when the market is in no index. Populated only on the authenticated /api/v1/markets list.
end_date?string,null (date-time)
When trading closes on the venue. This is not the settlement time; a market can sit in closed for a while before its outcome is published.
created_at?string (date-time)
When we first recorded this market, not when the venue listed it. Only the authenticated markets list returns it; the public markets list omits it.
updated_at?string (date-time)
When any stored field on this market last changed on our side, so it also moves on routine metadata refreshes and is not a price-move timestamp. Only the authenticated markets list returns it; the public markets list omits it.
link?stringnull
URL of the venue's public page for this contract. Kalshi is the parent event page. Polymarket is /event/<event-slug>/<market-slug> when both slugs exist and differ, /event/<event-slug> when only the event slug is usable, and /market/<market-slug> when only the market slug is usable. Gemini is /predictions/<eventTicker>/<slug>. Null when no working URL can be built.
state_code?stringnull
Two-letter US state code when the contract is tied to a state race. Absent for national contests and for markets with no state on record.
city_code?stringnull
Mayoral city code parsed at ingest; present for Mayoral markets, absent otherwise.
meta?object
Show properties
total?integernull
Total number of records matching the request across every page, not just the current one. null on an uncounted list; page using has_next. A relevance-ranked search is uncounted, and a searched events list stays uncounted even with sort. A searched markets list with sort returns a total over the ranked matches (at most 10,000).
page?integer
The 1-based page number this response covers.
per_page?integer
Maximum number of items on a page. The last page may hold fewer.
total_pages?integernull
Total number of pages available at the current per_page. null whenever total is null; page using has_next.
has_next?boolean
True when a page exists after this one.
has_prev?boolean
True when this is not the first page.
total_capped?boolean
True when total and total_pages reflect the server's counting ceiling rather than the exact matched count: the real set is at least total large. Render such totals as a lower bound (for example "10,000+"). Omitted when the count is exact. A sorted markets search that fills the 10,000-candidate ceiling sets this flag.
Request example
curl -X GET "https://api.adjacent.markets/api/v1/public/markets"
Response example
{
  "data": [
    {
      "market_id": "kalshi:KXPRESPARTY-2028-D",
      "ticker": "KXPRESPARTY-2028-D",
      "display_ticker": "KXPRESPARTY-2028-D",
      "platform": "kalshi",
      "question": "Will Democratic win the Presidency in 2028?",
      "link": "https://kalshi.com/markets/kxpresparty/kxpresparty-2028",
      "probability": 58,
      "volume": 233444.98,
      "volume_unit": "contracts",
      "volume_24h": 14.2,
      "volume_24h_unit": "contracts",
      "open_interest": 116538.21,
      "open_interest_unit": "contracts",
      "status": "active",
      "category": "Elections",
      "is_constituent": true
    }
  ],
  "meta": {
    "total": 1155,
    "page": 1,
    "per_page": 1,
    "total_pages": 1155,
    "has_next": true,
    "has_prev": false
  }
}
Adjacent API
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