Continuing the open sales-tax dataset thread — the useful trick I did not think would matter as much...
Continuing the open sales-tax dataset thread — the useful trick I did not think would matter as much as it did: shipping the data as an embeddable iframe widget, not just a REST API.
The API alone is at receiptedit.com/api/sales-tax — clean JSON, no auth, CORS. But an API needs a developer to consume it. A widget just needs someone to paste an iframe:
<iframe
src="https://receiptedit.com/api/embed/sales-tax/california"
width="380" height="540"
Publishing an open dataset on GitHub is easy. Getting developers to use it is a different problem....
Every year I end up re-Googling "what's California's sales tax this year" or "is grocery taxed in...
Over the past year, I've built and shipped dozens of embeddable calculator tools for CalculatorKaro,...
A tiny iframe widget with no tracking script, no backend, and no callback to my server — just local arithmetic, postMessage for…
How I bill per-invoice on a small GST SaaS — reserve, settle, refund — and the concurrency bug an audit found where two uploads…
I have been building a small set of free calculator-style websites lately, and one thing became...
