Migma's API generates production-ready, on-brand emails from a text prompt in about 30 seconds, using stored brand memory and returning React Email code. It also validates rendering across 40+ real devices, supports multi-language output in one call, and offers a no-code n8n integration for workflows like cart recovery.
Developers have spent decades wrestling with the "email problem." Table-based layouts. CSS support that varies across 40+ email clients. Outlook desktop still rendering HTML with the Microsoft Word engine, a quirk that has persisted since 2007.
The cost is not just technical. Every email touches a designer, a copywriter, a developer, and a QA pass before it ships. Litmus found in its State of Email Workflows report that 62% of email teams need two weeks or more to build a single email.
Today, we are officially opening the hood. The Migma API is now generally available.
This post covers what the API does, the core endpoints, and how to ship your first production-ready email in about 5 minutes.
Why Programmatic Email
The traditional workflow is a chain of handoffs: Figma for design, ChatGPT for copy, manual HTML coding, testing in Litmus, then uploading to an ESP. Each link adds delay and each handoff adds drift.
| Traditional workflow | With the Migma API |
|---|---|
| 5 tools, 4 handoffs | 1 endpoint |
| Hours to days per email | ~30 seconds to generate |
| Manual client testing | Automated real-device previews |
| Brand drift between emails | Project-level brand memory |
With the API, you can:
- Generate on-brand content using project-specific brand memory
- Automate brand imports from any URL to keep styles synced
- Validate rendering across 40+ real devices automatically
To be precise about the claim: 30 seconds covers campaign creation, not the full send lifecycle. Delivery still belongs to your ESP. But when the average team measures production in weeks, compressing the creation step to seconds changes what email can do in your product.
Core Endpoints for Your Stack
The API is designed to be as intuitive as the platform itself. Here are the pillars of the Migma developer experience.
1. AI-Powered Generation
Endpoint: POST /v1/projects/emails/generate
This is where the work happens. "Brand memory" means the API pulls stored brand context tied to your projectId: colors, tone, logo, and past campaigns. Your prompts stay short because the context is already there. A prompt like "Create a summer sale announcement" is enough, because the system already knows what your summer sale should look like.
The output is production-ready React Email code. React Email matters because it is component-based and compiles to HTML that renders reliably across email clients, including the difficult ones.
| \ |
|---|
| Parameter | What it does |
|---|---|
| projectId | Scopes generation to your brand memory |
| prompt | Plain-language campaign brief |
| webMode | Generates a web-hosted version alongside the email |
| languages | Returns localized variants in one call |
The languages array deserves attention. CSA Research's Can't Read, Won't Buy study found that 76% of online buyers prefer products with information in their native language. Localization has always been valuable. It was just expensive. Passing ["en", "es", "de"] in a single request makes it a default rather than a project.
The response returns the generated React Email code along with the compiled HTML, ready to hand to your sending provider.
2. Real-Device Previews
Endpoint: POST /v1/emails/previews
Emulators approximate. Real hardware does not. This endpoint triggers automated screenshots of your email on actual devices and clients, including legacy Outlook, so you stop guessing how your code degrades in the wild.
| const preview = await fetch('https://api.migma.ai/v1/emails/previews', { |
|---|
Results come back as URLs to the rendered screenshots, so you can pipe them into an approval flow or a Slack channel before anything reaches a subscriber. This is the QA pass that used to require a paid testing tool and a checklist, reduced to one call.
Automation Without the Code: n8n Integration
Not everyone reading this writes code, and that is fine. The Migma n8n integration puts the same engine inside a visual canvas. Migma nodes drop into n8n workflows alongside triggers from the tools you already run.
Two recipes to steal:
- Product drop: Shopify product added → generate a brand-matched announcement email → route to a teammate for approval
- Cart recovery: Cart abandoned → generate a recovery email in the customer's own language → push to your ESP
The second one matters more than it looks. Baymard Institute's meta-analysis of 50 studies puts the average cart abandonment rate at 70.22%. Roughly 7 out of 10 carts never convert. A recovery email that arrives fast, on brand, and in the right language is one of the highest-leverage automations in e-commerce, and it now takes zero code to build.
What You Can Build
Think in patterns, not features.
| Use case | Trigger | What the API handles |
|---|---|---|
| Behavioral campaigns | User event from your app | Generation + localization |
| E-commerce product drops | Shopify/WooCommerce webhook | Brand-matched dynamic emails |
| CRM-triggered sends | Internal dashboard action | High-fidelity email from a single API call |
A concrete example of the first row: a SaaS product fires an event when a user completes onboarding. Your backend calls the generated endpoint with a prompt like "Congratulate the user on finishing setup and suggest the next feature." The email that arrives matches your brand, reads like your team wrote it, and shipped without anyone opening a design tool.
Quickstart: Live in 5 Minutes
- Grab your API key in Settings → API Integration
- Import your brand via URL so the engine has your colors, tone, and logo
- Call the generate endpoint with your projectId and a prompt
- Trigger a preview run (optional) to validate rendering before you send
Explore the full documentation at docs.migma.ai and join the developer community on Discord.
Grab your API key and ship your first email today.
Conclusion: Email as Infrastructure
Email creation has stayed manual long after the rest of the stack went programmatic. Payments became an API. Search became an API. Messaging became an API. Email design and QA stayed a two-week loop of handoffs, and Litmus data shows most teams still live there.
The Migma API closes that gap. One endpoint generates production-ready React Email code from your brand memory. A second validates it on 40+ real devices before anyone hits send. The n8n integration extends both to teams that never touch code. What used to be a project is now a request and a response.
The quickstart takes five minutes. Grab your API key, import your brand, and make your first call. The docs at docs.migma.ai cover the rest, and the Discord community is there when you get stuck.
Funny enough, the images and content for this post were generated by Migma.
Every email you build manually costs you hours. Your first Migma call takes 30 seconds. Get your API key now.
FAQs
1. What does the Migma API do?
The Migma API generates production-ready, on-brand emails from a text prompt. It uses stored brand context to create React Email code, validates rendering on 40+ real devices, and returns localized variants in a single call.
- Does the Migma API replace my email sending provider?
No. Migma sits upstream of your ESP. The API handles email creation and rendering validation. Your existing provider, such as SendGrid, Resend, or Mailchimp, handles delivery. - What format does the Migma API return?
The generated endpoint returns production-ready React Email code, which compiles to HTML that renders reliably across email clients. - Can I use Migma without writing code?
Yes. The Migma n8n integration lets you build automated email workflows, such as Shopify product syncs and abandoned cart recovery, using drag-and-drop nodes. - How do I get a Migma API key?
Log in to Migma, go to Settings, then API Integration, and generate a key. You can import your brand from a URL and run your first generation within five minutes. - Does the Migma API support multiple languages?
Yes. Pass a languages array in the generate request and the API returns localized versions of the same email in one call.
