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
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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