Blog
Deep dives on APIs.
- API Rate Limiting: Handle 429s, Then Set Your OwnHow API rate limiting works from both sides: reading limit headers, backing off correctly from a 429 against real public APIs, and setting limits on your own.
- REST API Best Practices: What 1,613 APIs DoThe REST API best practices that matter, each one measured against the 1,613 public APIs in our directory, so you can see which are followed and which are ignored.
- Free API Hosting: 7 Options and Their Real LimitsWhere to deploy an API for free, with each provider's actual free-tier ceiling on requests, CPU and idle time, checked against their own pricing pages.
- API Authentication Methods: What 1,625 APIs UseThe four API authentication methods that matter, compared, plus live data on what 1,625 public APIs actually use in production today.
- How to Test an API (Step by Step, With Free APIs)A practical guide to testing an API: manual curl checks, the tools worth using, what every test should assert, and free public APIs to practise on.
- API Versioning Best Practices (With Real Examples)When to version an API, the four strategies that work (URI, header, date-based, query), how Stripe and GitHub do it, and how to retire old versions.