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📘 Keep API from meaning UI screen

A backend API is a contract over HTTP — resources, status codes, and auth — not a screen. REST design and error shapes keep clients honest.

3
lessons
~15 min
to learn
Adults
level
Start the course →

What you’ll learn

  1. Contract over HTTPDefine APIs as HTTP contracts, not UIs.Methods, status codes, and bodies carry the interface.
  2. REST resources and errorsUse resource-oriented REST habits and clear errors.Clients branch on status; idempotency matters on the wire.
  3. Auth, docs, and proofSeparate authn/authz and ship docs/tests.A small artifact proves the contract.

Grounded in trusted sources

  • RFC 9110: HTTP Semantics (IETF)
  • MDN Web Docs: HTTP overview
  • REST resource-oriented design primers
  • OWASP API security overview (context)
  • JSON API representation practice notes
  • Backend testing/documentation primers

Every Wunder lesson is built from real, reputable sources — never invented.

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