const options = {
  method: 'POST',
  headers: {'X-API-KEY': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    end_date: '<string>',
    lastcmd: '<string>',
    message_id: '<string>',
    rcpt: '<string>',
    rspcode: 123,
    rspmsg: '<string>',
    sender: '<string>',
    sender_id: '<string>',
    start_date: '<string>',
    subject: '<string>',
    upstream: '<string>',
    upstream_hostname: '<string>'
  })
};

fetch('https://api.mailchannels.net/outbound/v1/search', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.mailchannels.net/outbound/v1/search"

payload = {
    "end_date": "<string>",
    "lastcmd": "<string>",
    "message_id": "<string>",
    "rcpt": "<string>",
    "rspcode": 123,
    "rspmsg": "<string>",
    "sender": "<string>",
    "sender_id": "<string>",
    "start_date": "<string>",
    "subject": "<string>",
    "upstream": "<string>",
    "upstream_hostname": "<string>"
}
headers = {
    "X-API-KEY": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.mailchannels.net/outbound/v1/search",
  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([
    'end_date' => '<string>',
    'lastcmd' => '<string>',
    'message_id' => '<string>',
    'rcpt' => '<string>',
    'rspcode' => 123,
    'rspmsg' => '<string>',
    'sender' => '<string>',
    'sender_id' => '<string>',
    'start_date' => '<string>',
    'subject' => '<string>',
    'upstream' => '<string>',
    'upstream_hostname' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-KEY: <api-key>"
  ],
]);

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

curl_close($curl);

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

curl --request POST \
  --url https://api.mailchannels.net/outbound/v1/search \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --data '
{
  "end_date": "<string>",
  "lastcmd": "<string>",
  "message_id": "<string>",
  "rcpt": "<string>",
  "rspcode": 123,
  "rspmsg": "<string>",
  "sender": "<string>",
  "sender_id": "<string>",
  "start_date": "<string>",
  "subject": "<string>",
  "upstream": "<string>",
  "upstream_hostname": "<string>"
}
'

{
  "notice": "<string>",
  "results": [
    {
      "@timestamp": "<string>",
      "auth": "<string>",
      "delivered": "<string>",
      "lastcmd": "<string>",
      "message_id": "<string>",
      "rcpt": "<string>",
      "remediation_options": "DELIST",
      "rspcode": "<string>",
      "rspmsg": "<string>",
      "sender": "<string>",
      "sender_id": "<string>",
      "size": 123,
      "spam_disposition": "<string>",
      "subject": "<string>",
      "upstream_hostname": "<string>",
      "virus_disposition": "<string>"
    }
  ]
}

{
  "code": 123,
  "errors": [
    "<string>"
  ],
  "message": "<string>"
}

{
  "code": 123,
  "errors": [
    "<string>"
  ],
  "message": "<string>"
}