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.
FILTERDATA VALIDATION
Data Validation APIs: What Your Checks Actually Prove
A data validation API tells you whether user data is real or just well formed. What each check proves, where it belongs, and what to do when one fails.
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.
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