Lonti Blog

How to Design and Deploy Data Models as APIs with Negroni

Written by David Brown | April 16, 2025

Let’s be honest—data modeling shouldn’t be this hard.

You’ve got dozens of systems, each speaking its own dialect. You’re wrangling inconsistent schemas, brittle integrations, and layers of boilerplate code just to get something usable into your app or workflow. And by the time you’ve documented and exposed a reliable API, the business has already shifted gears.

I’ve been there. That’s exactly why we built Negroni.

Negroni is Lonti’s low-code data modeling tool built for developers like us—people who want structure and speed, without compromising power. You can create clean, standards-based data models and deploy them as fully functional, production-ready APIs in just minutes. And I’m going to show you exactly how.

Step 1: Open Negroni and Start a New Data Manifest

In Negroni, everything starts with a data manifest—this is your high-level container for entities, attributes, and relationships.

Think of it like your schema blueprint, but smarter: built on the Common Data Model (CDM) and designed to power APIs natively. You don’t need to start from scratch either—Negroni gives you CDM templates out of the box.

Pro tip: Stick with CDM-compliant structures from the beginning. It makes downstream integration (especially with Martini) frictionless.

Step 2: Define Your Entities Visually

This is where Negroni starts to feel like cheating (in the best way).

Fire up the visual editor. You’ll define entities (e.g. Customer, Order, Product) and their attributes with just a few clicks. Want to add a one-to-many relationship between Customer and Order? Drag, drop, done.

No hand-coded SQL. No ERD diagram gymnastics. No guessing what someone meant by “optional field” in a spreadsheet from 2018.

And yes—you can still fine-tune everything. Data types, constraints, calculated fields, defaults—Negroni gives you full control where it counts.

Step 3: Deploy Your Data Model as an API

Here’s where things get magical.

Once your data model is built, you can instantly expose it as a REST or GraphQL API—no extra tooling, no scaffolding, no “let me grab Postman and try to stitch this together.”

Just hit Publish to Martini, and your entire model becomes a live API, complete with:

  • CRUD endpoints
  • Relationship traversal
  • Search and filter parameters
  • Swagger/OpenAPI docs generated for you

Martini handles the runtime. You don’t need to set up a backend, manage security tokens, or worry about provisioning infrastructure. You get an enterprise-grade API, deployed in minutes, backed by a clean, reusable model.

And yes, you can version it, extend it, and integrate it with Bellini or anything else in your stack.

Step 4: Integrate It Anywhere (Thanks to Martini)

Because Negroni’s APIs are deployed via Martini, they instantly plug into Lonti’s broader integration and automation engine.
Need to sync your data with Salesforce or an internal SAP instance? Easy.

Want to trigger a workflow in Bellini every time a new Order is created? You’re covered.

Need to transform that Customer data before sending it to another API? Martini’s got the tools.

It’s all designed to work together. No brittle point-to-point integrations. No repeat modeling. Just one unified ecosystem where your data is the source of truth—and the source of action.

Final Thoughts: Model Once, Use Everywhere

Negroni isn’t just a data modeling tool. It’s a launchpad.

When you model with Negroni, you're not just creating a static schema—you’re creating a dynamic, reusable data API that can power everything from app UIs to backend automations.

It’s fast. It’s reliable. And best of all? It actually respects the way developers want to work.

So if you’re still spending days (or weeks) wrangling schema files and stitching together APIs by hand, it might be time to try something better.

Negroni is free to get started. You can create up to 5 data manifests, use unlimited entities, and publish directly to Martini—all with community support.

👉 Try Negroni Free →

Got questions? Want a walkthrough? I’d love to hear what you’re building—hit us up on the Lonti Community.

Let’s build better data models, faster.