Retrieve Attachment

const res = await fetch('https://post-waves.com/emails/receiving/{email_id}/attachments/{attachment_id}', {
  method: 'GET',
  headers: {
    Authorization: 'Bearer pw_xxxxxxxxx',
    'Content-Type': 'application/json',
  },
});
const data = await res.json();

import requests

res = requests.get(
    "https://post-waves.com/emails/receiving/{email_id}/attachments/{attachment_id}",
    headers={"Authorization": "Bearer pw_xxxxxxxxx"},
)
print(res.json())

<?php
$ch = curl_init('https://post-waves.com/emails/receiving/{email_id}/attachments/{attachment_id}');
curl_setopt_array($ch, [
  CURLOPT_CUSTOMREQUEST => 'GET',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_HTTPHEADER => [
    'Authorization: Bearer pw_xxxxxxxxx',
    'Content-Type: application/json',
  ],
]);
$response = json_decode(curl_exec($ch), true);

require "net/http"
require "json"

uri = URI("https://post-waves.com/emails/receiving/{email_id}/attachments/{attachment_id}")
req = Net::HTTP::Get.new(uri)
req["Authorization"] = "Bearer pw_xxxxxxxxx"
req["Content-Type"] = "application/json"

res = Net::HTTP.start(uri.host, uri.port, use_ssl: uri.scheme == "https") { |http| http.request(req) }
puts JSON.parse(res.body)

package main

import (
	"fmt"
	"io"
	"net/http"
)

func main() {
	req, _ := http.NewRequest("GET", "https://post-waves.com/emails/receiving/{email_id}/attachments/{attachment_id}", nil)
	req.Header.Set("Authorization", "Bearer pw_xxxxxxxxx")
	req.Header.Set("Content-Type", "application/json")
	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()
	out, _ := io.ReadAll(res.Body)
	fmt.Println(string(out))
}

curl -X GET 'https://post-waves.com/emails/receiving/{email_id}/attachments/{attachment_id}' \
  -H 'Authorization: Bearer pw_xxxxxxxxx'