Get a Kalshi order book

Try in Playground

Get the order book of a Kalshi market: resting Yes and No bids by price with their sizes, plus the best bid and ask on each side. Kalshi books hold bids only; a Yes ask is one dollar minus the best No bid.

GET/v1/kalshi/orderbookx-api-key

Headers

Get your API key

x-api-keystringrequiredheader

Your ScrapeAtlas customer key. Create one on /account/ and set SCRAPEATLAS_API_KEY.

Query parameters

tickerstringrequiredquery

Market ticker.

ExampleKXWC-30-ESP

depthstringquery

Price levels per side, 1–100; 0 or omitted returns every level.

Example10

Response fields

requestIdstring

Request correlation UUID.

Upstream requests, decoded response bytes and elapsed milliseconds.

accounting.upstreamRequestsinteger

Always included.

≥ 0

accounting.responseBytesinteger

Always included.

≥ 0

accounting.durationMsnumber

Always included.

≥ 0

successboolean

True when usable data is returned; inspect status and coverage for omissions.

statusenum

success, partial, failed or challenged. HTTP 200 can be partial.

one of: success, partial

sourceUrlstring

Kalshi public API URL the data was read from.

absolute HTTPS URL

fetchedAtstring

UTC retrieval time.

complete is false when a warning names an omission. order states the record order.

coverage.sourcestring

Always included.

coverage.completeboolean

Always included.

coverage.warningsstring[]

Always included.

tickerstring

Market ticker.

Kalshi’s book: yes_dollars and no_dollars, each a list of [price in dollars, size in contracts] bids in ascending price order, so the best bid is last. Empty lists when no bids rest.

orderbook_fp.yes_dollarsstring[][]

Always included.

up to 10000 items

orderbook_fp.no_dollarsstring[][]

Always included.

up to 10000 items

bestYesBidDollarsstringnullable

Highest Yes bid, or null when there is none.

bestYesAskDollarsstringnullable

Lowest Yes ask (1 minus the highest No bid), or null.

bestNoBidDollarsstringnullable

Highest No bid, or null.

bestNoAskDollarsstringnullable

Lowest No ask (1 minus the highest Yes bid), or null.

HTTP 200 returns the success variant. Check status: partial means usable data with warnings, and failed or challenged requests carry a failure object described in Errors & responses.

Error codes

HTTP	failure.code	Meaning
200	`partial`	Usable data with market_limit, metadata_unavailable, candle_limit, window_truncated, comment_limit or metrics_unavailable warnings.
400	`invalid_request`	Missing, duplicate, malformed or unsupported parameters, a link outside kalshi.com/markets, a price-history window above its period limit, or parameters Kalshi rejected.
401	`unauthorized`	Missing or invalid worker API key.
404	`not_found`	Unknown market, event, series, post or trader.
429	`upstream_rate_limited`	Kalshi rate limited the request.
502	`upstream_challenged`	Kalshi refused the public request.
502	`unsupported_page`	Malformed, mismatched or non-JSON source data.
502	`response_too_large` `payload_too_complex`	Response exceeded byte or parsing limits.
502	`unsafe_redirect` `request_limit` `upstream_error`	Bounded source retrieval could not complete.
503	`busy`	All worker slots and the waiting queue are occupied.
504	`timeout`	Total request deadline expired.

Code example

curl "https://api.scrapeatlas.com/v1/kalshi/orderbook?ticker=KXWC-30-ESP&depth=10" \
  -H "x-api-key: YOUR_API_KEY"

const response = await fetch(
  "https://api.scrapeatlas.com/v1/kalshi/orderbook?ticker=KXWC-30-ESP&depth=10",
  {
    headers: {
      "x-api-key": "YOUR_API_KEY"
    }
  }
);

const data = await response.json();
console.log(data.status, data);

type Result = {
  status: "success" | "partial" | "failed" | "challenged";
  requestId: string;
  [field: string]: unknown;
};

const response = await fetch(
  "https://api.scrapeatlas.com/v1/kalshi/orderbook?ticker=KXWC-30-ESP&depth=10",
  {
    headers: {
      "x-api-key": process.env.SCRAPEATLAS_API_KEY!
    }
  }
);

const data = (await response.json()) as Result;
if (data.status === "failed" || data.status === "challenged") {
  throw new Error(`Kalshi request failed: ${data.requestId}`);
}
console.log(data);

import requests

response = requests.get(
    "https://api.scrapeatlas.com/v1/kalshi/orderbook",
    headers={"x-api-key": "YOUR_API_KEY"},
    params={
        "ticker": "KXWC-30-ESP",
        "depth": "10"
    },
    timeout=60,
)
data = response.json()
print(data["status"], data)

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
)

func main() {
	req, _ := http.NewRequest("GET", "https://api.scrapeatlas.com/v1/kalshi/orderbook?ticker=KXWC-30-ESP&depth=10", nil)
	req.Header.Set("x-api-key", "YOUR_API_KEY")
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer resp.Body.Close()

	var data map[string]interface{}
	json.NewDecoder(resp.Body).Decode(&data)
	fmt.Println(data["status"], data)
}

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Main {
    public static void main(String[] args) throws Exception {
        var client = HttpClient.newHttpClient();
        var request = HttpRequest.newBuilder()
            .uri(URI.create("https://api.scrapeatlas.com/v1/kalshi/orderbook?ticker=KXWC-30-ESP&depth=10"))
            .GET()
            .header("x-api-key", "YOUR_API_KEY")
            .build();
        var response = client.send(request, HttpResponse.BodyHandlers.ofString());
        System.out.println(response.body());
    }
}

Use your sa_live_… customer key at https://api.scrapeatlas.com.

Responses

Successful result. Synthetic example validated against the runtime contract.

{
  "success": true,
  "status": "success",
  "requestId": "00000000-0000-4000-8000-000000000001",
  "sourceUrl": "https://api.elections.kalshi.com/trade-api/v2/markets/KXSYNTH-30-AAA/orderbook?depth=3",
  "fetchedAt": "2026-10-13T00:00:00.000Z",
  "coverage": {
    "source": "public_api",
    "complete": true,
    "warnings": []
  },
  "accounting": {
    "upstreamRequests": 1,
    "responseBytes": 400,
    "durationMs": 340
  },
  "ticker": "KXSYNTH-30-AAA",
  "orderbook_fp": {
    "yes_dollars": [
      [
        "0.1500",
        "423.53"
      ],
      [
        "0.1510",
        "2094.00"
      ],
      [
        "0.1520",
        "1.75"
      ]
    ],
    "no_dollars": [
      [
        "0.8320",
        "3780.87"
      ],
      [
        "0.8330",
        "120.00"
      ],
      [
        "0.8360",
        "512.42"
      ]
    ]
  },
  "bestYesBidDollars": "0.1520",
  "bestYesAskDollars": "0.1640",
  "bestNoBidDollars": "0.8360",
  "bestNoAskDollars": "0.8480"
}

Missing, duplicate, malformed or unsupported parameters, a link outside kalshi.com/markets, a price-history window above its period limit, or parameters Kalshi rejected.

{
  "requestId": "9d2f1c0a-6b1e-4c7d-9a8e-2f3b4c5d6e7f",
  "accounting": {
    "upstreamRequests": 0,
    "responseBytes": 0,
    "durationMs": 0
  },
  "success": false,
  "status": "failed",
  "failure": {
    "code": "invalid_request",
    "message": "Invalid request: missing, duplicate, unsupported or malformed parameters."
  }
}