REST APIs

HTTP APIs that connect frontends, agents, and model services.

Maturity level: L2 — Can Build

Six perspectives on REST APIs

Roadmap

Learn with Python before FastAPI and LLM endpoints.

Architecture

Contract between clients, agents, and backend services.

Company

Universal expectation for backend and AI engineer roles.

Projects

OpenAPI spec for every service you build.

Interview

API design and production concerns.

Career

Foundation for shipping AI products.

What & Why

What: RESTful HTTP APIs with JSON payloads, status codes, and authentication.

Why: AI features ship as APIs — even before FastAPI, you need HTTP fundamentals.

Build this

Design and document a versioned REST API for a prediction service with OpenAPI.

Production reality

  • ! Breaking changes
  • ! Auth leaks
  • ! Pagination bugs
  • ! Timeout cascades

Interview preparation

  • Design a REST API for batch inference
  • Idempotency for POST requests

Connected skills

PythonFastAPI

Explore REST APIs in the interactive universe or train with live cohorts.

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