Nexus Guard

Monitoring for indie hackers and solo founders

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September 18, 2026 I lost $2,400 to a silent Stripe failure — so I built Nexus Guard

Have you ever checked your Stripe dashboard and realized revenue dropped 40%… and you had NO IDEA why?

That happened to me. My webhook silently stopped firing. Users got errors at checkout. My site showed "200 OK." But behind the scenes, I was bleeding subscribers for three days before I noticed.

$2,400 in lost revenue. Gone.

I talked to 50+ solo founders and heard the same story:

"My sitemap returned 404 for a week before I noticed."

"A build update stripped all my meta tags — traffic dropped 60%."

"My payment provider changed their API, and I only found out from a customer email."

Existing tools don't help solo founders. PagerDuty, Datadog, Grafana — they're built for teams with DevOps. They false-positive constantly. They're expensive.

What solo founders actually need:

"Is my checkout working?" — answered in real-time
"Did my SEO just drop?" — alerted immediately
"Is my API still returning the right responses?" — caught on deploy

So I built Nexus Guard 🛡️

It monitors your side project every 60 seconds for:

Uptime — Global checks, no false positives
SEO health — Meta tags, sitemaps, 404 spikes
Checkout flows — Real transaction simulations
API integrity — Latency, errors, response shape

When something breaks, you get an alert within 60 seconds.

Pricing: $19/mo per project. Setup: 5 minutes. No code changes. Any stack.

I'm looking for 10 beta testers. 3 months free + lifetime 20% discount.

Join the waitlist: https://buy.stripe.com/dRmdR9dXy1w63OK5KA8N200

14 Comments

  1. 1
    The "technically up but revenue broken" gap is the one that costs real money. We had the same shape with our Google Ads: dashboard showed Eligible for six months, billing verified, every status indicator green — zero impressions the entire time. A missing billing setup that no health check on the campaign page would catch. Uptime monitoring answers "is the server responding?" but nobody asks "did money actually move?" until a customer emails. That is the layer worth paying for. One question on the multi-signal approach: monitoring uptime, SEO, checkout, and API simultaneously means four alert categories. The founders who left Datadog left partly because of false positives. How do you keep the signal-to-noise ratio clean when covering that much surface area? The alert-to-action ratio might be the product as much as the monitoring itself.
    1. 1
      That's a really good point. I don't want Nexus Guard to become another tool that just generates more alerts — especially when you're monitoring several surfaces at once. The goal is to make the alerts actionable rather than alerting on every small anomaly. That's actually one of the things I'm specifically validating with the beta: which signals are useful enough to act on, and which ones just create noise. The “alert-to-action ratio” is a great way to frame it. If founders start ignoring alerts, the monitoring itself stops being useful. That's something I want to measure and improve as I get real usage data.
  2. 1
    Talking to 50+ founders first makes sense. Most build the tool first, then look for the problem.
    1. 1
      Exactly. I wanted to validate the problem first, especially whether it's painful enough that founders would actually pay to prevent it. That's also why I'm treating the first conversations as part of the product validation, not just marketing. I want to understand what failures founders actually worry about before building further.
  3. 1
    Does Nexus Guard make silent payment/infra failures obvious before a founder loses another day of revenue? Happy to send a totally free first-impression video if useful.
    1. 1
      Absolutely, that would be really useful. I'd love to see what stands out to you from a first-time visitor's perspective, especially whether the value of Nexus Guard is clear and whether you'd understand what it actually monitors. Thanks for offering to do this — I really appreciate it!
  4. 1

    the simple does exist it's called healthchecks io

    1. 1
      You're right — Healthchecks.io solves the heartbeat/cron-job problem very well. Nexus Guard is focused on a different layer: detecting when a business is technically “up,” but something revenue-critical, like checkout or payments, has silently stopped working. That's the gap I'm validating with the beta.
      1. 1
        healthchecks io /signaling_failures/ docs/attaching_logs/ for enterprise level: Healthchecks.io supports exporting metrics and check statuses to Prometheus, for use with Grafana.
  5. 1

    The $2,400 loss and 50+ conversations make the problem credible. Which monitoring failure are beta users most willing to pay to prevent?

    1. 1
      So far, checkout/payment failures seem to resonate the most — especially when everything looks “up” but revenue has quietly stopped. That’s actually one of the things I’m validating with the beta: whether founders will pay specifically to prevent revenue-impacting failures rather than just monitor uptime.
      1. 1

        The revenue-impacting failure angle is the clearest paid-use signal so far. If you’re open to it, what’s the best email to reach you on?

        1. 1
          Absolutely — you can reach me at nexusguard.team@gmail.com. Happy to chat and hear more about what you're seeing around revenue-impacting failures.
          1. 1

            Thanks! I’ve just sent it over.

            Looking forward to hearing your thoughts whenever you have a chance.

About

I built Nexus Guard because I know how painful it is to discover a problem after it has already cost you customers and revenue. A checkout can fail, an API can break, or SEO can suddenly drop.