curl --request POST \
  --url https://posted-api.example.com/api/auth/passkeys/register/options \
  --header 'Origin: <origin>' \
  --cookie posted_session=

import requests

url = "https://posted-api.example.com/api/auth/passkeys/register/options"

headers = {
    "cookie": "posted_session=",
    "Origin": "<origin>"
}

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

print(response.text)

const options = {method: 'POST', headers: {cookie: 'posted_session=', Origin: '<origin>'}};

fetch('https://posted-api.example.com/api/auth/passkeys/register/options', 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://posted-api.example.com/api/auth/passkeys/register/options",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_COOKIE => "posted_session=",
  CURLOPT_HTTPHEADER => [
    "Origin: <origin>"
  ],
]);

$response = curl_exec($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://posted-api.example.com/api/auth/passkeys/register/options"

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

	req.Header.Add("cookie", "posted_session=")
	req.Header.Add("Origin", "<origin>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://posted-api.example.com/api/auth/passkeys/register/options")
  .header("cookie", "posted_session=")
  .header("Origin", "<origin>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://posted-api.example.com/api/auth/passkeys/register/options")

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

request = Net::HTTP::Post.new(url)
request["cookie"] = 'posted_session='
request["Origin"] = '<origin>'

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

{
  "challengeId": "example-challenge-token",
  "options": {
    "challenge": "example-browser-challenge",
    "rp": {
      "name": "Posted",
      "id": "posted.example.test"
    },
    "user": {
      "id": "ZXhhbXBsZS11c2VyLWlk",
      "name": "alex@example.test",
      "displayName": "Alex Morgan"
    },
    "pubKeyCredParams": [
      {
        "alg": -7,
        "type": "public-key"
      }
    ],
    "timeout": 60000,
    "attestation": "none",
    "excludeCredentials": [],
    "authenticatorSelection": {
      "residentKey": "required",
      "requireResidentKey": true,
      "userVerification": "required"
    }
  }
}

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