curl --request GET \
  --url https://external-api.kalshi.com/trade-api/v2/series

import requests

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

response = requests.get(url)

print(response.text)

const options = {method: 'GET'};

fetch('https://external-api.kalshi.com/trade-api/v2/series', 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/series",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
]);

$response = curl_exec($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/series"

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

	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/series")
  .asString();

require 'uri'
require 'net/http'

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

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

request = Net::HTTP::Get.new(url)

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

{
  "series": [
    {
      "ticker": "<string>",
      "frequency": "<string>",
      "title": "<string>",
      "category": "<string>",
      "tags": [
        "<string>"
      ],
      "settlement_sources": [
        {
          "name": "<string>",
          "url": "<string>"
        }
      ],
      "contract_url": "<string>",
      "contract_terms_url": "<string>",
      "fee_type": "quadratic",
      "fee_multiplier": 123,
      "additional_prohibitions": [
        "<string>"
      ],
      "product_metadata": {},
      "volume_fp": "10.00",
      "last_updated_ts": "2023-11-07T05:31:56Z",
      "exchange_index": 0
    }
  ]
}

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

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