curl --request POST \
  --url https://nxt-ulm-pdt.m1amdocs.io/oidc/introspect \
  --header 'Authorization: Basic <encoded-value>'

import requests

url = "https://nxt-ulm-pdt.m1amdocs.io/oidc/introspect"

headers = {"Authorization": "Basic <encoded-value>"}

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

print(response.text)

const options = {method: 'POST', headers: {Authorization: 'Basic <encoded-value>'}};

fetch('https://nxt-ulm-pdt.m1amdocs.io/oidc/introspect', 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://nxt-ulm-pdt.m1amdocs.io/oidc/introspect",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_HTTPHEADER => [
    "Authorization: Basic <encoded-value>"
  ],
]);

$response = curl_exec($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://nxt-ulm-pdt.m1amdocs.io/oidc/introspect"

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

	req.Header.Add("Authorization", "Basic <encoded-value>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://nxt-ulm-pdt.m1amdocs.io/oidc/introspect")
  .header("Authorization", "Basic <encoded-value>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://nxt-ulm-pdt.m1amdocs.io/oidc/introspect")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Basic <encoded-value>'

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

{
  "active": true,
  "scope": "openid profile email",
  "expires_at": "2085-05-13T23:03:30+0000",
  "exp": 3640633410,
  "sub": "6cc435f8-2960-4e37-8370-192fc350b552",
  "user_id": "2345|nxt",
  "client_id": "b0949ff1-bad0-4e09-95d1-5215e349d1b8",
  "token_type": "Bearer"
}

{
  "error": "invalid_request",
  "error_description": "Required String parameter 'token' is not present"
}

{
  "error": "invalid_client",
  "error_description": "Bad client credentials"
}

{
  "error": "access_denied",
  "error_description": "Client [rpId] is not allowed to call introspection endpoint"
}