How I built a Stripe billing health audit for SaaS

<h2> The problem </h2> <p>If you run a SaaS on Stripe, around 9% of your MRR is silently leaking every month. Cards expire. Banks decline. Customers don't notice.</p> <p>Stripe

<h2> The Day I Noticed the Drop </h2> <p>It started with a Slack notification I almost ignored: "Stripe: charge failed."</p> <p>One failed charge. Not unusual. I dismissed it and

<p>It was a Tuesday night, and I was renaming a price in the Stripe dashboard.</p> <p>A price I had already renamed in our code three weeks earlier. The deployment had gone fine.

<p>Your API returns 200 OK. Great. But is it actually <em>working</em>?</p> <p>I learned this the hard way. Last month, our payment webhook was "up" — returning 200s all day — but