API best practices & fundamentals
This cluster covers the core concepts and best practices that underpin well-designed APIs — from REST constraints and HTTP semantics to authentication, error handling, and versioning. Whether you're designing your first API or establishing standards for an API program, these guides give you the technical depth and practical guidance to build APIs developers love.
Articles
13 of 13 publishedREST API Design: A Complete Guide
Everything you need to design clean, scalable, standards-compliant REST APIs from first principles to production.
What Is a REST API?
A clear-language explanation of REST constraints, HTTP semantics, and what makes an API truly RESTful.
API Versioning Best Practices
URI versioning, headers, query params, and semantic versioning: how to evolve APIs without breaking clients.
API Documentation Best Practices
Tools, structure, and writing conventions for developer-loved API reference docs, guides, and changelogs.
API Authentication Best Practices
Comparing API keys, OAuth 2.1, JWT, and mTLS to pick the right auth mechanism for each context.
GraphQL vs REST
Data fetching, versioning, caching, and error handling compared, plus when to use each and how to run both.
OAuth 2.1 for APIs
Flows, scopes, PKCE, and how to implement OAuth 2.1 as your primary API authorization mechanism.
JWT vs OAuth
What each one is, how they work together, and when to use a token format versus an authorization framework.
API Rate Limiting Strategies
Fixed window, sliding window, token bucket, and adaptive rate limiting for API protection and fair use.
HTTP Status Codes: A Complete Reference
When to use 200 vs 201, 400 vs 422, and every other status code an API developer needs to know.
API Error Handling Best Practices
Designing clear error responses, RFC 9457 problem details, and error propagation patterns for REST APIs.
Idempotency Keys for APIs
How to make API operations safe to retry and why idempotency matters in distributed systems.
API Pagination Design Patterns
Offset, cursor, keyset, and page-token pagination: trade-offs and how to implement each correctly.
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