curl --request POST \
  --url https://app.lettr.com/api/emails/scheduled \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "from": "sender@example.com",
  "from_name": "Sender Name",
  "to": [
    "recipient@example.com"
  ],
  "subject": "Scheduled Newsletter",
  "html": "<h1>Hello</h1><p>This email was scheduled!</p>",
  "scheduled_at": "2024-01-16T10:00:00Z",
  "options": {
    "click_tracking": true,
    "open_tracking": true
  }
}
'

import requests

url = "https://app.lettr.com/api/emails/scheduled"

payload = {
    "from": "sender@example.com",
    "from_name": "Sender Name",
    "to": ["recipient@example.com"],
    "subject": "Scheduled Newsletter",
    "html": "<h1>Hello</h1><p>This email was scheduled!</p>",
    "scheduled_at": "2024-01-16T10:00:00Z",
    "options": {
        "click_tracking": True,
        "open_tracking": True
    }
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    from: 'sender@example.com',
    from_name: 'Sender Name',
    to: ['recipient@example.com'],
    subject: 'Scheduled Newsletter',
    html: '<h1>Hello</h1><p>This email was scheduled!</p>',
    scheduled_at: '2024-01-16T10:00:00Z',
    options: {click_tracking: true, open_tracking: true}
  })
};

fetch('https://app.lettr.com/api/emails/scheduled', 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://app.lettr.com/api/emails/scheduled",
  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([
    'from' => 'sender@example.com',
    'from_name' => 'Sender Name',
    'to' => [
        'recipient@example.com'
    ],
    'subject' => 'Scheduled Newsletter',
    'html' => '<h1>Hello</h1><p>This email was scheduled!</p>',
    'scheduled_at' => '2024-01-16T10:00:00Z',
    'options' => [
        'click_tracking' => true,
        'open_tracking' => true
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://app.lettr.com/api/emails/scheduled"

	payload := strings.NewReader("{\n  \"from\": \"sender@example.com\",\n  \"from_name\": \"Sender Name\",\n  \"to\": [\n    \"recipient@example.com\"\n  ],\n  \"subject\": \"Scheduled Newsletter\",\n  \"html\": \"<h1>Hello</h1><p>This email was scheduled!</p>\",\n  \"scheduled_at\": \"2024-01-16T10:00:00Z\",\n  \"options\": {\n    \"click_tracking\": true,\n    \"open_tracking\": true\n  }\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://app.lettr.com/api/emails/scheduled")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"from\": \"sender@example.com\",\n  \"from_name\": \"Sender Name\",\n  \"to\": [\n    \"recipient@example.com\"\n  ],\n  \"subject\": \"Scheduled Newsletter\",\n  \"html\": \"<h1>Hello</h1><p>This email was scheduled!</p>\",\n  \"scheduled_at\": \"2024-01-16T10:00:00Z\",\n  \"options\": {\n    \"click_tracking\": true,\n    \"open_tracking\": true\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.lettr.com/api/emails/scheduled")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"from\": \"sender@example.com\",\n  \"from_name\": \"Sender Name\",\n  \"to\": [\n    \"recipient@example.com\"\n  ],\n  \"subject\": \"Scheduled Newsletter\",\n  \"html\": \"<h1>Hello</h1><p>This email was scheduled!</p>\",\n  \"scheduled_at\": \"2024-01-16T10:00:00Z\",\n  \"options\": {\n    \"click_tracking\": true,\n    \"open_tracking\": true\n  }\n}"

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