# Backend & APIs

Building APIs with AI is powerful but requires more discipline than frontend work. A wrong color is cosmetic. A wrong API response is a bug. A missing auth check is a vulnerability.

API Design with AI

Start by designing your API before implementing it:

> I'm building a bookmark manager app. Design the REST API:
  - Users can CRUD bookmarks (title, url, description, tags)
  - Users can only access their own bookmarks
  - Support filtering by tag and searching by title
  - Support pagination
  List each endpoint with its method, path, request body, and response shape.

This gives you a specification to review BEFORE any code is written.