Email API for Developers: Generate & Test HTML Emails

Introduction

For years, developers have been trying to solve the "email problem." From table-based layouts and inconsistent CSS support across more than 40 email clients to the constant switching between design tools and code, building production-ready emails has remained a slow, fragmented process.

Today, we're officially opening the hood. The Migma API is now generally available, transforming our AI-powered email engine into a single, programmable endpoint that fits directly into your development stack.

Why Programmatic Email?

The traditional email workflow is inefficient:

Figma for design → ChatGPT for copy → Manual HTML coding → Testing in Litmus → Uploading to an ESP

Migma compresses this entire lifecycle into just 30 seconds. With the API, developers can:

• Generate on-brand email content using project-specific brand memory.
• Automate brand imports from any URL to keep styles consistently synced.
• Validate rendering across 40+ real devices automatically.

Core Endpoints for Your Stack

The Migma API is designed to be as intuitive as the platform itself, giving developers everything needed to generate and validate production-ready emails.

AI-Powered Generation

The POST /v1/projects/emails/generate endpoint is the core of the experience. Using your stored brand context, it creates production-ready React Email code.

const res = await fetch('https://api.migma.ai/v1/projects/emails/generate', {

  method: 'POST',

  headers: { 'Authorization': 'Bearer API_KEY' },

  body: JSON.stringify({

    projectId: "your_project_id",

    prompt: "Create a summer sale announcement",

    webMode: true,

    languages: ["en", "es"]

  })

});

Real-Device Previews

Stop guessing how your emails will appear in clients like Outlook 2013. The POST /v1/emails/previews endpoint automatically generates screenshots across more than 40 real devices, helping you validate rendering before deployment.

Automation Without the Code: n8n Integration

For teams that prefer visual workflows, Migma integrates with n8n, enabling drag-and-drop automation for complete email lifecycles. Whether you're syncing Shopify products or triggering abandoned cart recovery, you can automate workflows without writing additional code.

What Can You Build?

The possibilities are limited only by your projectId.

Marketing Automation

Scale personalized campaigns based on user behavior.

E-commerce Sync

Connect Shopify or WooCommerce to generate dynamic product drops.

Custom CRM Tools

Trigger high-fidelity emails directly from your internal dashboards.

Get Started in 5 Minutes

We've taken the complexity of fragmented email workflows and compressed it into a single endpoint.

Getting started is simple:

1. Grab your API key from Settings → API Integration.
2. Import your brand via URL.
3. Initialize your first email generation.

Read More: https://migma.ai/blog/migma-api-a-developers-guide-to-programmatic-email#1-ai-powered-generation