Synthetic checks
We run your checkout every 5 minutes.
Headless browser probes walk through your actual Stripe checkout and login flows on a schedule. If a step fails, you know within minutes — not when a customer emails you.
Early access
Your checkout
is broken.
You don't know yet.
Signal runs your Stripe checkout, login, and signup flows every 5 minutes in a real browser. When something breaks, you get an email — not a churned customer.
3 flows5-min checksemail alerts
signal — yourapp.com
LIVE
Stripe Checkout
99.98%
User Login
99.95%
Signup Flow
97.20%
Incidents
_14:32
Stripe Checkout — payment_intent failed
resolved8 min
09:15
Signup Flow — 503 on /api/auth/register
resolved23 min
NOW
Signup Flow — elevated error rate on step 3
investigating—
5 min
Check interval
every flow, every time
< 60s
Time to alert
from failure to inbox
$19
Per month, flat
no per-seat, no tiers
The problem
Endpoint monitoring
misses what actually breaks.
Your homepage returns 200 OK. Your health check passes. But the Stripe checkout form throws a JavaScript error on step 3 and nobody can pay you. UptimeRobot and Datadog don't catch this — they never open a browser.
What you get
Everything a solo founder needs.
Status page
A public page your customers can check.
Each monitored flow gets an operational / degraded / down indicator and a 90-day uptime bar. Share it with customers so they stop asking "is it just me?"
Incident timeline
See what broke, when, and for how long.
Incidents are auto-created when checks fail and auto-resolved when they pass again. One timeline instead of piecing together Stripe alerts, logs, and customer reports.
Email alerts
Get an email the moment revenue is at risk.
When checkout or login starts failing, you get a clear alert with what broke and where. When it recovers, another email closes the loop.
How it works
Three steps. Five minutes.
01
Define your flows
Tell Signal which URLs, forms, and buttons make up your checkout, login, or signup. Simple config — no code.
02
Signal checks every 5 min
A headless browser walks through each flow like a real user. If any step fails — a 500, a JS error, a missing element — Signal catches it.
03
Get alerted, not surprised
Email alert with what broke and where. Incident auto-created. Status page updated. You fix it before customers notice.
Founder plan
$19/month
Everything a solo founder needs to sleep at night. No per-seat fees. No enterprise upsell.
- Up to 3 monitored browser flows
- Checks every 5 minutes, 24/7
- Public status page
- Incident timeline with auto-detection
- Email alerts on failure and recovery
- Priority onboarding during early access
stripe checkout · cancel anytime
FAQ
Questions
What exactly does Signal monitor?
The browser flows that make you money — Stripe checkout, login, signup. We run them in a headless browser every 5 minutes and flag failures before your customers find them.
How is this different from Datadog or UptimeRobot?
Those tools ping endpoints. Signal walks through multi-step browser flows like a real user would. A 200 OK on your homepage means nothing if the Stripe checkout form throws a JS error on step 3.
Who is this for?
Solo founders and tiny teams (1–3 people) running Stripe-powered SaaS. You have no SRE team and currently find out about outages from customer complaints or a revenue dip.
Can I try before paying?
Join the waitlist with your product URL and we will prioritize your onboarding. The paid plan gives you immediate early access with hands-on setup help.
Waitlist
Not ready to buy yet?
Share your product URL and biggest monitoring blind spot. We'll use it to prioritize onboarding and shape the first version for real founder workflows.