Backend API Design

The chapters in this module, in reading order.

#	Chapter
00	Backend API Design — The Five-Year-Old Version
01	REST API Design — build the menu around nouns, not kitchen actions
02	GraphQL Design — let each client pick exactly what lands on the plate
03	gRPC and Protobuf — compact binary order slips for fast internal service calls
04	Webhooks and Callbacks — push the receipt out when the event happens
05	Auth, OAuth, JWT, and Sessions — let the wait staff check identity before service starts
06	API Gateway and Routing — The kitchen window that directs every plate
07	Idempotency and Retries — The order slip that should not cook twice
08	Pagination, Filtering, Sorting — The menu that stays readable at scale
09	Versioning and Deprecation — The menu that changes without confusing regulars
10	Error Handling and Contracts — a good receipt explains the mistake properly
11	Rate Limiting and Throttling — the wait staff pace the dining room deliberately
12	API for AI Agents — menus must be built for robot waiters too
13	Honest Admission — good API menus still leave unsolved arguments behind