API reference · Markets

List markets

GET/v1/public/markets

Search every Kalshi and Polymarket market Langbot lists, with its status, latest price and volume.

On this page

Auth. None. Without a token the call is served as Free (the Free delay and request budget, shared per IP); send Authorization: Bearer lb_… for your plan's.

Limits. Counts against your plan's API requests; anonymous callers also share 30 a minute per IP.

Parameters

Query parameters

Name	Type	Required	Description
`q`	string	no	Free text over the ticker, title, outcome and phrases (case-insensitive).
`venue`	string	no	`kalshi` or `polymarket`.
`category`	string	no	A category slug; the response lists them under `categories`.
`status`	string	no	`open`, `closed`, `settled` or `all`. Default `all`.
`sort`	string	no	`volume`, `closing` (soonest first) or `new`. Default `volume`.
`cursor`	string	no	`next_cursor` from the previous page.
`limit`	integer	no	Page size. 1 to 200. Default `50`.
`parlays`	boolean	no	Include Kalshi combination markets, which are left out by default.

Request

Terminal

curl "https://api.langbot.ai/v1/public/markets?q=senate&status=open&limit=2"

Python

from langbot import LangbotClient

async with LangbotClient() as lb:
    page = await lb.public_markets("senate", status="open", limit=2)
    for m in page["markets"]:
        print(m["venue"], m["ticker"], m["price"], m["title"])

TypeScript

import { LangbotClient } from "@langbotai/sdk";

const lb = new LangbotClient();
const page = await lb.publicMarkets({ q: "senate", status: "open", limit: 2 });
for (const m of page.markets) console.log(m.venue, m.ticker, m.price, m.title);

Response

200 OK

JSON

{
  "ts": 1793685839220,
  "q": "senate",
  "venue": null,
  "category": null,
  "status": "open",
  "sort": "volume",
  "limit": 2,
  "total": 3563,
  "total_capped": false,
  "next_cursor": "bzoy",
  "categories": [
    {"slug": "crypto", "name": "crypto", "markets": 3915279, "open": 1},
    {"slug": "sports", "name": "sports", "markets": 1154664, "open": 33}
  ],
  "markets": [
    {
      "ticker": "SENATETX-26-R",
      "venue": "kalshi",
      "event_id": null,
      "title": "Will Republicans win the Senate race in Texas?",
      "subtitle": "Ken Paxton",
      "status": "open",
      "result": null,
      "category": "elections",
      "category_slug": "elections",
      "close_ts": 1825254000000,
      "open_ts": 1733238000000,
      "volume": 48312851.44,
      "price": 0.265,
      "price_source": "mid"
    },
    {
      "ticker": "KXBALANCEPOWERCOMBO-27FEB-RR",
      "venue": "kalshi",
      "event_id": null,
      "title": "Will House Control be Republican AND Senate Control be Republican for Feb 2027?",
      "subtitle": "Republicans sweep",
      "status": "open",
      "result": null,
      "category": "elections",
      "category_slug": "elections",
      "close_ts": 1801494000000,
      "open_ts": 1765465200000,
      "volume": 34989300.49,
      "price": 0.0535,
      "price_source": "mid"
    }
  ]
}

A real response from the API; long lists are cut to their first items.

price is the YES probability (0 to 1) and price_source says where it came from: result once settled, else the book mid, the last trade or the close. Pass next_cursor back as cursor for the next page (null on the last).

Errors

Status	`code`	When
401	`token_invalid`	A token was sent and not recognised. Send a valid one, or none to call anonymously.
422	`validation_error`	A parameter failed validation; `detail[].loc` names it.
429	`rate_limited`	Over your request budget; wait `Retry-After` seconds.

Every error body is {"detail": …, "code": "…"}; branch on code. All codes: Errors.