Template syntax
The Mattermix API uses the Handlebars templating syntax to dynamically update values in HTML or CSS. For example, you could have the following in your HTML: <p>{{title}}</p>. The title value could be updated with the API by passing a title value in the content object of the request body.
Below is an example using the Fetch API from JavaScript:
const body = {
html: "<html><body><p>{{title}}</p></body></html>",
content: {
title: "Hello World!"
const res = await fetch("mattermix.com/api/v1/image", {
method: "POST",
headers: {
"Content-Type": "application/json",
Authorization: `Bearer ${process.env.MATTERMIX_API_KEY}`
body: JSON.stringify(body)
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