curl --request GET \
  --url https://external-api.kalshi.com/trade-api/v2/concert_cancellation_markets/concerts \
  --header 'KALSHI-ACCESS-KEY: <api-key>' \
  --header 'KALSHI-ACCESS-SIGNATURE: <api-key>' \
  --header 'KALSHI-ACCESS-TIMESTAMP: <api-key>'

import requests

url = "https://external-api.kalshi.com/trade-api/v2/concert_cancellation_markets/concerts"

headers = {
    "KALSHI-ACCESS-KEY": "<api-key>",
    "KALSHI-ACCESS-SIGNATURE": "<api-key>",
    "KALSHI-ACCESS-TIMESTAMP": "<api-key>"
}

response = requests.get(url, headers=headers)

print(response.text)

const options = {
  method: 'GET',
  headers: {
    'KALSHI-ACCESS-KEY': '<api-key>',
    'KALSHI-ACCESS-SIGNATURE': '<api-key>',
    'KALSHI-ACCESS-TIMESTAMP': '<api-key>'
  }
};

fetch('https://external-api.kalshi.com/trade-api/v2/concert_cancellation_markets/concerts', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://external-api.kalshi.com/trade-api/v2/concert_cancellation_markets/concerts",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "KALSHI-ACCESS-KEY: <api-key>",
    "KALSHI-ACCESS-SIGNATURE: <api-key>",
    "KALSHI-ACCESS-TIMESTAMP: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://external-api.kalshi.com/trade-api/v2/concert_cancellation_markets/concerts"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("KALSHI-ACCESS-KEY", "<api-key>")
	req.Header.Add("KALSHI-ACCESS-SIGNATURE", "<api-key>")
	req.Header.Add("KALSHI-ACCESS-TIMESTAMP", "<api-key>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://external-api.kalshi.com/trade-api/v2/concert_cancellation_markets/concerts")
  .header("KALSHI-ACCESS-KEY", "<api-key>")
  .header("KALSHI-ACCESS-SIGNATURE", "<api-key>")
  .header("KALSHI-ACCESS-TIMESTAMP", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://external-api.kalshi.com/trade-api/v2/concert_cancellation_markets/concerts")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["KALSHI-ACCESS-KEY"] = '<api-key>'
request["KALSHI-ACCESS-SIGNATURE"] = '<api-key>'
request["KALSHI-ACCESS-TIMESTAMP"] = '<api-key>'

response = http.request(request)
puts response.read_body

{
  "concerts": [
    {
      "jambase_event_id": "jambase:16543035",
      "name": "<string>",
      "lineup": [
        "<string>"
      ],
      "venue_name": "<string>",
      "timezone": "America/New_York",
      "scheduled_date": "2026-11-20",
      "markets": [
        {
          "cover": "postponed",
          "event_ticker": "<string>",
          "market_ticker": "<string>"
        }
      ],
      "headliner": "<string>",
      "city": "<string>",
      "region": "<string>",
      "country": "<string>",
      "start_time": "2026-11-20T20:00:00",
      "latitude": 123,
      "longitude": 123,
      "url": "<string>"
    }
  ],
  "page": 123,
  "total_pages": 123
}

{
  "code": "<string>",
  "message": "<string>",
  "details": "<string>"
}

{
  "code": "<string>",
  "message": "<string>",
  "details": "<string>"
}

{
  "code": "<string>",
  "message": "<string>",
  "details": "<string>"
}

{
  "code": "<string>",
  "message": "<string>",
  "details": "<string>"
}

{
  "code": "<string>",
  "message": "<string>",
  "details": "<string>"
}