/campaigns/:id/content

put https://api.mailerlite.com/api/v2/campaigns/{id}/content

Upload your HTML template to created campaign [Rate limited]

You can use your custom HTML template and associate it with created campaign using this endpoint.

HTML template

HTML template must contain head and body tags, a link for unsubscribing is also required.

Example of HTML template with unsubscribe link:

<html>
    <head>
        <title>Email template</title>
    </head>
    <body>
        <h1>Title</h1>
        <p>Content</p>
        <p>
            <small>
                <a href="{$unsubscribe}">Unsubscribe</a>
            </small>
        </p>
    </body>
</html>

Plain text mail

Some email clients do not support HTML emails so you need to set plain text email and it must contain these variables:

{$unsubscribe} - unsubscribe link
{$url} - URL to your HTML newsletter

Language

Authorization

Header

Click Try It! to start a request and see the response here!