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Steps to Add a Subscriber to MailerLite

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1. Collect the User’s Email

  • Add a step to your workflow that collects the user’s email.
  • Store the collected email in a variable named, for example, {{user.email}}.
{
  "trigger": "Collect User Email",
  "userInput": {
    "type": "email",
    "label": "Enter your email address",
    "variableName": "user.email"
  }
}

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2. Add a Webhook Step

  • Insert a Webhook step after the email is collected.

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3. Configure the Webhook Step

Set up the Webhook step with the following information:

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Webhook Configuration:

  • Method: POST
  • URL: https://connect.mailerlite.com/api/subscribers
  • Headers: Add the following headers:
    • Content-Type: application/json
    • Authorization: Bearer YOUR_TOKEN (replace YOUR_TOKEN with your MailerLite API key)
  • Body: Configure the body as JSON with the email variable and any additional fields you want to include.
{
  "email": "{{user.email}}",
  "fields": {
    "name": "{{user.name}}"
  }
}

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Example Setup:

{
  "method": "POST",
  "url": "https://connect.mailerlite.com/api/subscribers",
  "headers": {
    "Content-Type": "application/json",
    "Authorization": "Bearer YOUR_TOKEN"
  },
  "body": {
    "email": "{{user.email}}",
    "fields": {
      "name": "{{user.name}}"
    }
  }
}
Note: You can find your API key in the MailerLite API settings.

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4. Preview in Iframe

Ensure that the workflow is set up correctly, and test it using an iframe preview.

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Iframe Example:

To preview, integrate an iframe in your testing environment. Example configuration: 
<iframe
  src="https://your-app-preview-url"
  width="100%"
  height="600px"
  frameborder="0"
  allowFullScreen
></iframe>

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5. Additional Fields

For more information on what fields you can add, refer to the MailerLite documentation: List All Fields.

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Validation and Testing

Before deployment, verify the following:
  • Ensure the email collection step saves the email correctly into the {{user.email}} variable.
  • Validate that the Webhook request sends data accurately to MailerLite.
  • Test the iframe preview to confirm it displays as expected.
Tip: Use JSONLint to validate your JSON structure.