9 posts

API

Articles and guides about API.

AILLMAPI

OpenAI vs Claude vs Gemini: Choosing the Right LLM API

A practical comparison of GPT-4o, Claude, and Gemini for production applications, pricing, quality, latency, and when to use each.

Veld Systems
OpenAI vs Claude vs Gemini: Choosing the Right LLM API
APIArchitectureBest Practices

API Design Best Practices That Actually Matter

API design best practices that affect real world developer experience, naming conventions, error handling, pagination, versioning, and the rules worth following.

Veld Systems
API Design Best Practices That Actually Matter
SecurityAPIEngineering

API Security Beyond Authentication: Rate Limiting, Validation, and Encryption

A deep dive into API security beyond authentication. Covers rate limiting, input validation, encryption, OWASP API risks, and production hardening techniques.

Veld Systems
API Security Beyond Authentication: Rate Limiting, Validation, and Encryption
APIEngineeringBusiness

What Is an API and Why Your Business Needs One

APIs are the connective tissue of modern software. Learn what an API is, how it works, why your business likely needs one, and what good API design looks like.

Veld Systems
What Is an API and Why Your Business Needs One
APIEngineeringStrategy

Building a Developer API: Turning Your Product into a Platform

How to design and build a developer API that turns your product into a platform, covering authentication, documentation, rate limiting, and developer experience.

Veld Systems
Building a Developer API: Turning Your Product into a Platform
APISaaSEngineering

Building a SaaS API for Third Party Integrations

Learn how to design, build, and maintain a public API for your SaaS product that developers actually want to integrate with.

Veld Systems
Building a SaaS API for Third Party Integrations
AIAPIStrategy

How to Evaluate AI Vendors and APIs for Your Product

A practical guide to evaluating AI vendors and APIs. Learn what to test, what to ask, and how to avoid vendor lock in when choosing AI for your product.

Veld Systems
How to Evaluate AI Vendors and APIs for Your Product
APIArchitectureEngineering

GraphQL in Production: When It Helps and When It Hurts

A practical guide to running GraphQL in production. When GraphQL saves development time, when REST is the better choice, and how to avoid common pitfalls.

Veld Systems
GraphQL in Production: When It Helps and When It Hurts
APIPricingEngineering

How Much Does API Development Cost in 2025

A detailed breakdown of API development costs. Covers REST and GraphQL APIs, authentication, documentation, rate limiting, and what drives the price from $10,000 to $300,000.

Veld Systems
How Much Does API Development Cost in 2025