curl --request POST \
  --url https://api.parlayx.com/v1/kalshi/orders/batch \
  --header 'Content-Type: application/json' \
  --header 'Idempotency-Key: <idempotency-key>' \
  --header 'PX-Content-Sha256: <px-content-sha256>' \
  --header 'PX-Key-Id: <px-key-id>' \
  --header 'PX-Signature: <px-signature>' \
  --header 'PX-Timestamp: <px-timestamp>' \
  --data '
{
  "orders": [
    {
      "ticker": "KXPRES-2028",
      "side": "BID",
      "count": "10",
      "price": "0.38",
      "postOnly": true,
      "selfTradePrevention": "TAKER_AT_CROSS",
      "cancelOrderOnPause": true,
      "timeInForce": {
        "type": "GTC"
      },
      "clientOrderId": "order-1"
    }
  ]
}
'

import requests

url = "https://api.parlayx.com/v1/kalshi/orders/batch"

payload = { "orders": [
        {
            "ticker": "KXPRES-2028",
            "side": "BID",
            "count": "10",
            "price": "0.38",
            "postOnly": True,
            "selfTradePrevention": "TAKER_AT_CROSS",
            "cancelOrderOnPause": True,
            "timeInForce": { "type": "GTC" },
            "clientOrderId": "order-1"
        }
    ] }
headers = {
    "PX-Key-Id": "<px-key-id>",
    "PX-Timestamp": "<px-timestamp>",
    "PX-Signature": "<px-signature>",
    "PX-Content-Sha256": "<px-content-sha256>",
    "Idempotency-Key": "<idempotency-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'PX-Key-Id': '<px-key-id>',
    'PX-Timestamp': '<px-timestamp>',
    'PX-Signature': '<px-signature>',
    'PX-Content-Sha256': '<px-content-sha256>',
    'Idempotency-Key': '<idempotency-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    orders: [
      {
        ticker: 'KXPRES-2028',
        side: 'BID',
        count: '10',
        price: '0.38',
        postOnly: true,
        selfTradePrevention: 'TAKER_AT_CROSS',
        cancelOrderOnPause: true,
        timeInForce: {type: 'GTC'},
        clientOrderId: 'order-1'
      }
    ]
  })
};

fetch('https://api.parlayx.com/v1/kalshi/orders/batch', 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://api.parlayx.com/v1/kalshi/orders/batch",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'orders' => [
        [
                'ticker' => 'KXPRES-2028',
                'side' => 'BID',
                'count' => '10',
                'price' => '0.38',
                'postOnly' => true,
                'selfTradePrevention' => 'TAKER_AT_CROSS',
                'cancelOrderOnPause' => true,
                'timeInForce' => [
                                'type' => 'GTC'
                ],
                'clientOrderId' => 'order-1'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "Idempotency-Key: <idempotency-key>",
    "PX-Content-Sha256: <px-content-sha256>",
    "PX-Key-Id: <px-key-id>",
    "PX-Signature: <px-signature>",
    "PX-Timestamp: <px-timestamp>"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.parlayx.com/v1/kalshi/orders/batch"

	payload := strings.NewReader("{\n  \"orders\": [\n    {\n      \"ticker\": \"KXPRES-2028\",\n      \"side\": \"BID\",\n      \"count\": \"10\",\n      \"price\": \"0.38\",\n      \"postOnly\": true,\n      \"selfTradePrevention\": \"TAKER_AT_CROSS\",\n      \"cancelOrderOnPause\": true,\n      \"timeInForce\": {\n        \"type\": \"GTC\"\n      },\n      \"clientOrderId\": \"order-1\"\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("PX-Key-Id", "<px-key-id>")
	req.Header.Add("PX-Timestamp", "<px-timestamp>")
	req.Header.Add("PX-Signature", "<px-signature>")
	req.Header.Add("PX-Content-Sha256", "<px-content-sha256>")
	req.Header.Add("Idempotency-Key", "<idempotency-key>")
	req.Header.Add("Content-Type", "application/json")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.parlayx.com/v1/kalshi/orders/batch")
  .header("PX-Key-Id", "<px-key-id>")
  .header("PX-Timestamp", "<px-timestamp>")
  .header("PX-Signature", "<px-signature>")
  .header("PX-Content-Sha256", "<px-content-sha256>")
  .header("Idempotency-Key", "<idempotency-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"orders\": [\n    {\n      \"ticker\": \"KXPRES-2028\",\n      \"side\": \"BID\",\n      \"count\": \"10\",\n      \"price\": \"0.38\",\n      \"postOnly\": true,\n      \"selfTradePrevention\": \"TAKER_AT_CROSS\",\n      \"cancelOrderOnPause\": true,\n      \"timeInForce\": {\n        \"type\": \"GTC\"\n      },\n      \"clientOrderId\": \"order-1\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.parlayx.com/v1/kalshi/orders/batch")

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

request = Net::HTTP::Post.new(url)
request["PX-Key-Id"] = '<px-key-id>'
request["PX-Timestamp"] = '<px-timestamp>'
request["PX-Signature"] = '<px-signature>'
request["PX-Content-Sha256"] = '<px-content-sha256>'
request["Idempotency-Key"] = '<idempotency-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"orders\": [\n    {\n      \"ticker\": \"KXPRES-2028\",\n      \"side\": \"BID\",\n      \"count\": \"10\",\n      \"price\": \"0.38\",\n      \"postOnly\": true,\n      \"selfTradePrevention\": \"TAKER_AT_CROSS\",\n      \"cancelOrderOnPause\": true,\n      \"timeInForce\": {\n        \"type\": \"GTC\"\n      },\n      \"clientOrderId\": \"order-1\"\n    }\n  ]\n}"

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

{
  "orders": [
    {
      "clientOrderId": "<string>",
      "orderId": "3f8b2c9a-2d18-4f7e-9c2a-1b6e1f0c8a4d",
      "status": "PENDING",
      "filledCount": "4",
      "remainingCount": "6",
      "averagePrice": "0.384",
      "error": {
        "code": "INVALID_REQUEST",
        "message": "<string>"
      }
    }
  ]
}

{
  "error": {
    "code": "INVALID_REQUEST",
    "message": "<string>",
    "orderId": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  }
}

{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "<string>"
  }
}

{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "<string>"
  }
}

{
  "error": {
    "code": "IDEMPOTENCY_CONFLICT",
    "message": "Idempotency key was reused with a different request body"
  }
}

{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "<string>"
  }
}

{
  "error": {
    "code": "INVALID_REQUEST",
    "message": "<string>",
    "orderId": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  }
}

{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "<string>"
  }
}