CORE/learn

Concept_Map

The hierarchical grid of API design principles. Navigate through domains to master the architecture of the modern web.

Domain::fundamentals

API Fundamentals

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What is an API

The interface between software components.

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Client–Server Model

The request-response architecture.

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HTTP Basics

Methods, Headers, and Status Codes.

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Domain::rest

REST Design Mastery

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REST Constraints

The six guiding principles of REST.

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Resource Modeling

Thinking in terms of nouns, not verbs.

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URL Design & Naming

Creating intuitive and consistent paths.

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Idempotency & Safety

Ensuring repeated requests have the same effect.

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Domain::graphql

GraphQL Deep Dive

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GraphQL Schema & Types

Defining the shape of your data.

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Resolvers & Execution

How data is fetched for each field.

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N+1 Problem

The common performance trap in nested fetching.

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Domain::security

API Security & Auth

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Authentication (Keys, OAuth, JWT)

Verifying who the user is.

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Rate Limiting & Throttling

Protecting the server from overload.

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Domain::performance

Performance & Caching

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Caching (HTTP, CDN, Client)

Storing responses for faster future access.

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Domain::evolution

Evolution & Versioning

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Versioning Strategies

Managing changes without breaking clients.

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Backward Compatibility

Ensuring old clients still work.

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