curl --request GET \
  --url https://api.tempmaillab.com/v1/messages/{message_id}/attachments/{attachment_id} \
  --header 'Authorization: Bearer <token>'

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.tempmaillab.com/v1/messages/{message_id}/attachments/{attachment_id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.tempmaillab.com/v1/messages/{message_id}/attachments/{attachment_id}"

headers = {"Authorization": "Bearer <token>"}

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

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.tempmaillab.com/v1/messages/{message_id}/attachments/{attachment_id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

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

curl_close($curl);

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

"<string>"

{
  "error": {
    "code": "invalid_api_key",
    "message": "A valid API key is required.",
    "request_id": "req_a1b2c3d4e5f6g7h8"
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "details": [
      {
        "reason": "<string>",
        "field": "<string>"
      }
    ]
  }
}

{
  "error": {
    "code": "resource_not_found",
    "message": "The requested resource was not found.",
    "request_id": "req_a1b2c3d4e5f6g7h8"
  }
}

{
  "error": {
    "code": "rate_limit_exceeded",
    "message": "Too many requests. Retry after the indicated delay.",
    "request_id": "req_a1b2c3d4e5f6g7h8"
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "details": [
      {
        "reason": "<string>",
        "field": "<string>"
      }
    ]
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "details": [
      {
        "reason": "<string>",
        "field": "<string>"
      }
    ]
  }
}