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.
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…
Five years in, we finally have the right word for what we are
For five years we called ourselves an API marketplace, but usage-based pricing, one Spotify-style subscription, and hosting providers ourselves quietly made us something else — a…
Trusting and Bundling Packages Keeps Getting Harder for developers in 2026
Open-source packages were the answer to building everything yourself. Then came chalk/debug, Shai-Hulud, and xz-utils. A sourced look at why package trust is breaking down, and wh…
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…
AEO vs SEO: What Answer Engine Optimization Actually Changes
Answer engine optimization (AEO) explained: how AI search picks its sources, what changes vs classic SEO, what stays the same, and a practical AEO checklist.
Link Preview API: Safe Link Previews Without Building a Scraper
Generate link previews with one API call — title, description, image, plus a built-in malicious-link check. No scraper to maintain, no SSRF risk, serverless-ready.
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…