API Authentication

API Authentication is a central practical lesson in Brevvie Python + AI — Section 4: APIs, Postman & Calling the Web. The source moves from public APIs with no auth, to simple API keys, to the custom hash-based flow required by Marvel API.

Levels shown in the source

• no-auth public APIs like PokéAPI
• API-key requests like openweather, Polygon.io, and newsapi
• computed-auth requests like Marvel API

Why it matters

Different APIs protect access differently. The main transferable skill is learning the auth ceremony from docs, then expressing it cleanly in tools and code.