freeCodeCamp

How to Give an AI Agent Safe Access to an Internal API with MCP

Harish Gaggar |
Our on-call team keeps a small internal notes API. The web app in front of it shows who's holding the pager, which days are frozen for deploys, and where the runbooks live. A developer on that team wa... read more

Secure by Design: How to Engineer Security into Architecture Before Writing Any Code

Oluwaseyi Fatunmole |
There's a conversation that happens in most engineering teams,maybe usually too late. Think of this, a feature ships to production. A security review happens afterwards, or a penetration test finds so... read more

How to Build Disaster Simulations on a Real Map: Animated Canvas Layers and Collapsing 3D Buildings with Mapbox GL JS and Three.js

Alex Oliinyk |
At some point, a map project needs more than markers and polygons. You want something to happen on the map: water moving up a street, smoke drifting with the wind, or a shockwave spreading out from a... read more

How to Stop an AI Agent from Inventing Nigerian Postcodes

Kayode Adeniyi |
On 1 October 2026, Nigeria's postcode changed from six digits to an 11-character code that identifies a single building, such as EK-01-A03-FK-01. Language models trained before that date still describ... read more

How to Keep a File for Minutes, Not Years, on Cloud Run

Abhinay Gokul |
A print job, a one-time download, or a support attachment typically only needs to exist until someone finishes with it. But most backends still store it like Google Drive: a named object, no expiry, a... read more

The State of AI and Software Engineering: Code is Cheaper but Expertise are More Valuable [Full Book]

Vahe Aslanyan |
A report on AI productivity, human capability, software economics, SaaS defensibility, and the future of engineering work. Between 2024 and 2026, the marginal cost of producing a line of working code... read more

What to Do When Your Constants Are Someone Else's Law

Javeed Shaik |
A colleague once asked me why a number in my code had a comment three lines long. The number was 18. The comment said which rule it came from, which section notified it, and that it could change witho... read more

How to Measure Conformance Between an Operational Specification and Its Execution

Hugo Teijiz |
In my previous article, I explored executor independence: the idea that different execution mechanisms should be able to satisfy the same operational specification. By executor independence, I mean th... read more

How to Add Structured Data (JSON-LD) to a Next.js Site and Validate It

Saar Twito |
Structured data has always mattered to search engines. When a search engine reads your page, it sees HTML: a heading, some paragraphs, a date somewhere, a name somewhere else. Structured data tells it... read more

Create Scalable AI Automations with n8n

Beau Carnes |
Most automation tutorials show you how to connect two simple apps and call it a day. But building workflows that companies can actually run in production requires an entirely different skill set, one... read more