tonytonggg@tonytonggg
XA Stripe webhook “silently dead for about a month” cost a sale during a live demo.
View original post ↗For apps built with AI builders
Know your app broke before your customers do.
Your app looks fine. But a signup form, a checkout page or a Stripe webhook quietly stopped working, and the first person to notice is usually a customer. Breakflag raises the flag first.
The free launch check works today, with no signup and no keys. We're testing interest before we build the monitor.
EXAMPLE ALERT
Stripe webhook silent for 3h: checkout may be brokenNo checkout.session.completed events since 9:12 AM. You normally get about 4 an hour.
Homepage 200 · 212 ms
/signup renders OK
/checkout JS error
SSL certificate expires in 12 days
82
Weekly health score, with fix prompts ready to paste into your builder.
Works with apps built on
♥ Lovableϟ Bolt
Cursor
Replit
v0
Stripe
Supabase
Real builders, real losses
Silent failures cost real money
These are public posts from builders, quoted with links. They aren't Breakflag customers or testimonials, and they don't endorse us.
bashirbuilds@bashirbuilds
X“The app is still up… But one Stripe webhook stopped… And the customer is the first person to notice.”
View original post ↗Nightmux@Nightmux
X“you ask the agent for dark mode, it quietly drops your Stripe webhook handlers… revenue leaks for days”
View original post ↗r/SaaSReddit audit
RedditAn audit of 30 vibe-coded MVPs reported unverified Stripe webhooks in 26 of them, and one $4,200 OpenAI bill run up by a scraper over a weekend. (Our summary of a self-reported audit.)
Read the thread ↗Indie HackersFounder post
IHOne post describes $2,300 leaking from a founder's Stripe account for 11 months before anyone noticed. (Our summary.)
Read the post ↗How it works
Three steps to sleeping better
Steps 2 and 3 describe the planned monitor. Step 1 works today.
Run the free launch check
Paste your URL and get a 0–100 score in about 20 seconds. It covers exposed keys, SSL, security headers, and whether signup, login and checkout load.
Connect your app
Prove you own it with a DNS record or meta tag. If you want Stripe checks, add a read-only restricted Stripe key.
Get flagged, not surprised
Instant email or text alerts when something breaks, plus a plain-English weekly report with fix prompts.
What the monitor will watch
The quiet failures uptime tools miss
An app can be “up” while signup or payments are broken. Breakflag will watch the paths that make you money.
Uptime, every 5–10 min
An alert the moment your app goes down or starts returning errors.
Signup and checkout, in a real browser
Every hour, a real browser opens your key pages and checks for blank screens and JavaScript errors.
Stripe webhook health
Failed deliveries, and unusual silence when payment events stop arriving.
SSL and domain expiry
A warning weeks before a certificate or domain lapses and your site goes dark.
A weekly report in plain English
What's healthy, what isn't, and a fix prompt to paste into Lovable, Bolt or Cursor.
Your app only, read-only access
We monitor only apps you've verified you own, and we never hold keys that can move money.
Live sample score
What a launch score looks like
93
example.com: 93/100 · A real result from our checker, run Oct 21, 2026.
- Reachable, status 200, 43 ms response
- HTTPS certificate valid for 65 more days
- No exposed secret keys found
- 6 of 6 recommended security headers missing (−7)
Planned pricing
Cheaper than one lost sale
There's nothing to pay now, and the waitlist is free. These prices are our plan and may change before launch.
Recommended
Solo
$9/month
- 1 app, every check
- Signup and checkout browser checks
- Stripe webhook monitoring
- SSL and domain expiry
- Weekly report with fix prompts
FAQ
Questions, answered honestly
Is the monitor available now?
Not yet. The free launch check works today. We're collecting waitlist signups to see whether enough builders want the monitor before we build it. If not enough do, we'll tell you and won't build it.
Do you need my Stripe secret key?
No, never. The free check needs no keys at all. The monitor would ask for an optional restricted, read-only key that can see events but can't move money or change anything.
Is the free check safe to run?
Yes. It only makes the same requests a normal visitor's browser would, and only reads publicly served pages. Please only check apps you own or have permission to test.
How is this different from UptimeRobot or Better Stack?
Those are good general uptime tools. Breakflag focuses on what breaks in AI-built apps: signup and checkout flows, Stripe webhooks, and plain-English fix prompts for your builder. No monitor catches everything, so treat it as a safety net, not a guarantee.
Are you affiliated with Lovable, Bolt, Cursor, Replit or Stripe?
No. Breakflag is independent. “Works with” means we can check apps built on those tools.
Join the waitlist
Be first when the monitor launches
- We'll email you once at launch, and maybe a question or two about what to build.
- No spam. Leave any time.
- We never sell your details.