Guide5 min read

Export Emails via API

MiN8T Team

Email Engineering

April 12, 2026

1 Export to HTML

Export any template to HTML programmatically:

POST /api/v1/export/html
Content-Type: application/json
MiN8T-Api-Auth: your-api-key

{
  "template_id": "clx7abc...",
  "include_amp": true
}

The export pipeline:

Fetches the template and serializes it to email-safe HTML
If include_amp is true and the template has AMP blocks, generates AMP HTML
Runs AMP validation (DOCTYPE, boilerplate, size limits, forbidden content, component scripts)
Generates plain text version
Assembles 3-part MIME (text/plain + text/x-amp-html + text/html)

2 Export to ESP

Upload the template directly to a connected ESP (Brevo, Mailchimp, SendGrid, etc.):

POST /api/v1/export/:espSlug/template
Content-Type: application/json
MiN8T-Api-Auth: your-api-key

{
  "template_id": "clx7abc...",
  "connection_id": "conn_xyz...",
  "list_id": "list_123",
  "include_amp": true
}

MiN8T:

Generates the HTML (and AMP HTML if requested)
Retrieves the ESP connection credentials for your account
Uploads the template to the ESP via their API
Returns the ESP's template ID and upload status

The ESP slug is the lowercase name of the provider (e.g., brevo, mailchimp, sendgrid). You must have an active connection configured in the Integrations dashboard.

3 Response Fields

{
  "success": true,
  "data": {
    "html": "<!DOCTYPE html>...</html>",
    "amp_html": "<!doctype html><html amp4email>...</html>",
    "amp_validation": {
      "valid": true,
      "errors": [],
      "warnings": ["CSS size: 12KB of 75KB limit"]
    },
    "mime": "Content-Type: multipart/alternative...",
    "plain_text": "Your email in plain text..."
  }
}

Key fields:

html — the final email HTML, ready to send
amp_html — the AMP4Email document (only present if include_amp was true and AMP blocks exist)
amp_validation — validation results with errors and warnings
mime — the complete 3-part MIME message (ready for direct SMTP sending)
plain_text — auto-generated text-only version

✓

The mime field gives you a complete, ready-to-send email. Pass it directly to any SMTP library (Nodemailer, Python smtplib, etc.) without any additional assembly.

4 Next Steps

Canonical JSON API — generate personalized emails with data before exporting
How to Export AMP HTML Emails — detailed AMP export workflow
How to Test and Export AMP Emails — test before you send

Last updated: April 2026. All details verified against MiN8T's actual codebase implementation.