curl --location  'https://api.aopay.co.in/api/AOP/V1/AEPS/GetStateList' \
--header 'Content-Type: application/json' \
--data  '{
"RegistrationID": "AOP-554"
}'
                                

import requests
import json

url = 'https://api.aopay.co.in/api/AOP/V1/AEPS/GetStateList'
payload = json.dumps({
"RegistrationID": "AOP-554"
}) 

headers = {
  "Content-type" : "application/json"
}

response = requests.request("POST" url, headers=headers, data=payload)

print (response.text)
                                

var requests = require("request");
var options = { 
  "method" : "POST",
  "url" : 'https://api.aopay.co.in/api/AOP/V1/AEPS/GetStateList',
  "headers" : {
    "Content-Type" : 'application/json'
  },
  body: JSON.stringify({
  "RegistrationID": "AOP-554"
 }) 
}; 
request(options, function(error, response){
   if(error) throw new Error(error);
   console.log(response.body); 
}); 
                                

var client = new HttpClient();
var request = new HttpRequestMessage(HttpMethod.Post,'https://api.aopay.co.in/api/AOP/V1/AEPS/GetStateList')
var content = new StringContent(
  "{
"RegistrationID": "AOP-554"
}",
  null,"application/json"
); 

request.Content = content;
var response =  await client.SendAsync(request);
response.EnsureSuccessStatusCode();
Console.WriteLine(await response.Content.ReadAsStringAsync());
                                

<?php
$curl =  curl_init();
curl_setopt_array($curl, array(
  CURLOPT_URL =>  'https://api.aopay.co.in/api/AOP/V1/AEPS/GetStateList',
  CURLOPT_RETURNTRANSFER =>  true,
  CURLOPT_ENCODING =>  '',
  CURLOPT_MAXREDIRS =>  10,
  CURLOPT_TIMEOUT =>  0,
  CURLOPT_FOLLOWLOCATION =>  true,
  CURLOPT_HTTP_VERSION =>  CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST =>  'POST',
  CURLOPT_POSTFIELDS =>  '{
  "RegistrationID": "AOP-554"
  }',
  CURLOPT_HTTPHEADER =>  array(
    'Content-Type: application/json'
  ),
));
$response =  curl_exec($curl);
curl_close($curl);
echo $response;