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IntermediateApplied5 weeks

API Development

Design robust APIs with predictable contracts, documentation, versioning, validation, and error semantics.

Topic 8 of 24

Prerequisites

Databases
Backend Language Selection

Key Concepts & Skills

REST
GraphQL
gRPC
API Versioning
API Documentation
Design REST resources
Write OpenAPI docs
Validate payloads
Version APIs

Learning Outcomes

Understand the core principles of REST
Configure and deploy GraphQL successfully
Troubleshoot common issues with gRPC
Understand the core principles of API Versioning
Configure and deploy API Documentation successfully
Troubleshoot common issues with Design REST resources
Understand the core principles of Write OpenAPI docs
Configure and deploy Validate payloads successfully
Troubleshoot common issues with Version APIs

Resources

Official Docs

OpenAPI specification GraphQL Learn gRPC docs

Video

Fireship: APIs for Beginners

Practice Exercises

Design endpoints for a notes app.Write OpenAPI documentation.Add validation and structured errors.

Project Task

Build a versioned REST API with docs and validation.

Quiz

What makes an API backwards compatible?Explain the answer with one real-world example.List one mistake a beginner might make here.

Notes