Create Template

Save a reusable email template. The returned id can be passed as template_id to POST /email/send — recipients receive the template's HTML with {{variables}} substituted from the request's variables map.

Endpoint

POST /templates

Returns: 201 Created

Headers

Header	Value	Required
Authorization	Bearer <your-api-key>	Yes
Content-Type	application/json	Yes

Body Parameters

Parameter	Type	Required	Description
name	string	Yes	Display name. Max 255 characters.
html	string	Yes	Email body HTML. Supports {{variables}} for personalization.

HTML is sanitized

The HTML you submit is run through a sanitizer (scripts, event handlers, and external resources are stripped) and Arsel's unsubscribe placeholders are auto-injected. The stored HTML returned in the response may differ from what you sent.

Response

{
  "id": "01957e3a-4b5c-7d8e-9f0a-1b2c3d4e5f6a",
  "name": "Welcome Email v2",
  "html": "<h1>Welcome!</h1><p>Thanks for signing up.</p>",
  "created_at": "2026-03-08T12:00:00.000Z",
  "updated_at": "2026-03-08T12:00:00.000Z"
}

Field	Type	Description
id	string	Template ID. Use this as template_id in send/campaign requests.
name	string	Template name
html	string	Sanitized HTML body
created_at	string	ISO 8601 timestamp
updated_at	string	ISO 8601 timestamp

---

Examples

cURL

curl -X POST "https://api.arsel.sa/v1/templates" \
  -H "Authorization: Bearer be_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Welcome Email v2",
    "html": "<h1>Welcome, {{first_name}}!</h1><p>Thanks for joining.</p>"
  }'

JavaScript

const response = await fetch("https://api.arsel.sa/v1/templates", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    Authorization: "Bearer be_your_api_key",
  },
  body: JSON.stringify({
    name: "Welcome Email v2",
    html: "<h1>Welcome, {{first_name}}!</h1><p>Thanks for joining.</p>",
  }),
});

const template = await response.json();
console.log(template.id);

Python

import requests

response = requests.post(
    "https://api.arsel.sa/v1/templates",
    headers={
        "Content-Type": "application/json",
        "Authorization": "Bearer be_your_api_key",
    },
    json={
        "name": "Welcome Email v2",
        "html": "<h1>Welcome, {{first_name}}!</h1><p>Thanks for joining.</p>",
    },
)

template = response.json()
print(template["id"])

C#

using var client = new HttpClient();
client.DefaultRequestHeaders.Add("Authorization", "Bearer be_your_api_key");

var payload = new
{
    name = "Welcome Email v2",
    html = "<h1>Welcome, {{first_name}}!</h1><p>Thanks for joining.</p>"
};

var json = System.Text.Json.JsonSerializer.Serialize(payload);
var content = new StringContent(json, System.Text.Encoding.UTF8, "application/json");
var response = await client.PostAsync("https://api.arsel.sa/v1/templates", content);
Console.WriteLine(await response.Content.ReadAsStringAsync());

PHP

<?php
$ch = curl_init("https://api.arsel.sa/v1/templates");
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    "Content-Type: application/json",
    "Authorization: Bearer be_your_api_key"
]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode([
    "name" => "Welcome Email v2",
    "html" => "<h1>Welcome, {{first_name}}!</h1><p>Thanks for joining.</p>"
]));
$response = curl_exec($ch);
echo $response;
curl_close($ch);

---

Error Responses

422 Validation Error

{
  "status_code": 422,
  "name": "validation_error",
  "message": "name should not be empty, html should not be empty"
}

401 Unauthorized

{
  "status_code": 401,
  "name": "unauthorized",
  "message": "Invalid or missing API key"
}