Notes from building ApyHub.
Engineering write-ups, product decisions, and the occasional opinion on how to ship developer infrastructure. Long enough to be useful, short enough that you'll finish it.
Dynamic pricing: every API call costs what the work actually costs
ApyHub APIs can price each request by the work performed, not by an average or a worst-case ceiling. What that means for providers publishing APIs and for the teams calling them.
HTML to PDF API: What It Does and Why Teams Use One
Turn a web page or HTML into a PDF with one API call. What HTML to PDF APIs are used for, why teams stop building it themselves, and the options on ApyHub.
How to Monetize an API in 2026: Pricing, Distribution, and What You Actually Keep
A practical guide to API monetization: the commission every major marketplace takes, how to price per call, and what changes now that agents are the buyers.
IFSC Code Validation API: Verify Indian Bank Details Before You Send Money
An IFSC code identifies a specific bank branch in India. Learn how IFSC validation works, why regex is not enough, and how to verify codes with a single API call.
EU VAT Number Validation API: Check Tax IDs Before You Invoice
A VAT number identifies a business for tax purposes. Learn how EU VAT formats work, where regex breaks down, and how to validate tax IDs with one API call.
ApyHub MCP Server: Native API Discovery and Execution for AI Agents
ApyHub shipped a native MCP server that lets AI agents search the certified API catalog at runtime and call exactly the capability they need, instead of loading hundreds of tool d…
The SOA Promise: Why Trust Held It Back, and Why AI Agents Make It Unavoidable
Service-oriented architecture promised software composed from best-in-class services. Trust was the blocker. Here is why the agentic era, EU regulation, and the maintenance tax ma…
HTTP Status Codes: A Developer's Cheat Sheet (With Fixes for the Common Errors)
A practical HTTP status code cheat sheet: what every code class means, the ~25 codes you'll actually hit, and how to fix the common 4xx and 5xx errors — with curl examples and a q…
7 AI Hiring APIs to Automate Recruitment, From Job Post to Offer (2026)
AI hiring APIs can run the whole recruitment funnel — resume screening, job description generation, interview prep, salary benchmarking and more. Here's how seven of them fit a mo…
Beyond RapidAPI: 7 API Marketplaces That Actually Support AI Agents in 2026
RapidAPI defined the category, but the agentic shift has reshaped it. Here are 7 API marketplaces — ApyHub, Postman, Kong, Nango, Merge, APILayer, and Rapid — compared on how well…
Top 5 APIs Every AI Agent Needs in 2026 (Plus a Bonus)
AI agents can reason and write but they can't act without tools. Here are 5 ApyHub utility APIs that give agents hands: reading documents, extracting data, generating files, and r…
Top 5 Free APIs for Side Projects That Actually Matter
A short, honest list of free APIs you can actually build a side project on in 2026 — Supabase, Stripe, Resend, Groq, and ApyHub — with real free-tier limits, where each one shines…