Magento Change Order Status from REST API
<p>I am 'communicating' with a Magento web app(version 1.9.2.2) via the REST API in a C# ASP.NET MVC application. </p>

<p>The application essentially acts as a backend order flow dashboard for pizzas. I need to display the latest orders and allow the user to check the items off as they are processed (among other things).</p>

<p>I am able to retrieve orders, products, customers etc; but need to be able to update the order status. From my research it seems that this can be achieved by adding an order comment. </p>

<p><strong>That said, my questions are as follows:</strong></p>

<ol>
<li>Is adding an order comment (thus updating the order status) only possible through the SOAP Service in Magento 1.9?</li>
<li>If the above is true, how can I update the order status of a particular order using another <em>secure</em> approach?</li>
</ol>

<p>Docs on REST API: <a href="http://devdocs.magento.com/guides/m1x/api/rest/Resources/Orders/order_comments.html" rel="nofollow">http://devdocs.magento.com/guides/m1x/api/rest/Resources/Orders/order_comments.html</a></p>