curl --request POST \
  --url https://clob.polymarket.com/heartbeats \
  --header 'POLY_ADDRESS: <api-key>' \
  --header 'POLY_API_KEY: <api-key>' \
  --header 'POLY_PASSPHRASE: <api-key>' \
  --header 'POLY_SIGNATURE: <api-key>' \
  --header 'POLY_TIMESTAMP: <api-key>'

import requests

url = "https://clob.polymarket.com/heartbeats"

headers = {
    "POLY_API_KEY": "<api-key>",
    "POLY_ADDRESS": "<api-key>",
    "POLY_SIGNATURE": "<api-key>",
    "POLY_PASSPHRASE": "<api-key>",
    "POLY_TIMESTAMP": "<api-key>"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    POLY_API_KEY: '<api-key>',
    POLY_ADDRESS: '<api-key>',
    POLY_SIGNATURE: '<api-key>',
    POLY_PASSPHRASE: '<api-key>',
    POLY_TIMESTAMP: '<api-key>'
  }
};

fetch('https://clob.polymarket.com/heartbeats', 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://clob.polymarket.com/heartbeats",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_HTTPHEADER => [
    "POLY_ADDRESS: <api-key>",
    "POLY_API_KEY: <api-key>",
    "POLY_PASSPHRASE: <api-key>",
    "POLY_SIGNATURE: <api-key>",
    "POLY_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://clob.polymarket.com/heartbeats"

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

	req.Header.Add("POLY_API_KEY", "<api-key>")
	req.Header.Add("POLY_ADDRESS", "<api-key>")
	req.Header.Add("POLY_SIGNATURE", "<api-key>")
	req.Header.Add("POLY_PASSPHRASE", "<api-key>")
	req.Header.Add("POLY_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.post("https://clob.polymarket.com/heartbeats")
  .header("POLY_API_KEY", "<api-key>")
  .header("POLY_ADDRESS", "<api-key>")
  .header("POLY_SIGNATURE", "<api-key>")
  .header("POLY_PASSPHRASE", "<api-key>")
  .header("POLY_TIMESTAMP", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://clob.polymarket.com/heartbeats")

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

request = Net::HTTP::Post.new(url)
request["POLY_API_KEY"] = '<api-key>'
request["POLY_ADDRESS"] = '<api-key>'
request["POLY_SIGNATURE"] = '<api-key>'
request["POLY_PASSPHRASE"] = '<api-key>'
request["POLY_TIMESTAMP"] = '<api-key>'

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

{
  "status": "ok"
}

{
  "error": "Invalid API key"
}

{
  "error": "Internal server error"
}