Your WordPress clients' sites
break in ways pings miss.
A site can return 200 OK and still have an expired SSL cert. A DNS migration can succeed and still drop MX records for client email. Merlonix watches the layer beneath the uptime check — so you know before the client does.
No credit card either way — start free, or trial the full workspace.
- Check cadence (Agency)
- 1 min
- SSL pre-expiry alert
- 30 days
- Vendors watched
- 11
- Encrypted DNS lookups
- DoH
Where WordPress agencies get surprised
Three failure modes your uptime monitor cannot see.
Uptime monitors check HTTP response codes. SSL expiry, DNS drift, and vendor outages all fail at a different layer — and they're the failures that generate client calls, not silent 404s.
Let's Encrypt failure
SSL renewals silently break
Let's Encrypt auto-renewal depends on web server config, cron jobs, and challenge routes that WordPress plugins can accidentally block. The cert lapses. The site stays green on your ping monitor until a visitor sees the browser warning.
Migration residue
DNS drift after host changes
Every WordPress migration touches DNS. A record, MX, SPF, CNAME for staging — something almost always lingers or gets dropped. Merlonix diffs your expected DNS state against live DNS resolution and alerts when they diverge.
WooCommerce dependency
Payment vendor outages hit revenue
A WooCommerce store is only as reliable as its payment gateway, shipping provider, and email service. When Stripe has a partial outage or Mailchimp goes down, your client stops selling. Merlonix monitors vendor status pages so you know before they call.
How it works
Set it up once per client. Watch everything from there.
Merlonix is designed for agencies managing many WordPress clients — one account, every domain, one alert flow that only fires when something actually needs attention.
01
Add your client domains
Verify ownership with a DNS TXT record or .well-known file — one attestation per client. Takes under two minutes per domain. Then Merlonix owns the watching from there.
02
SSL and DNS check every 5 minutes
A DNS-over-HTTPS resolver confirms your expected records on every check. SSL chains are validated end-to-end — expiry date, issuer, chain completeness. Alerts at 30 days, 14 days, 7 days, and immediately on expiry.
03
AI filters noise before alerting
Transient DNS propagation delays and resolver disagreements get classified as noise. Real expiry threats and genuine DNS changes reach your team. You stop ignoring alerts because every one that fires matters.
04
Alert lands in Slack or email
Alerts include domain, check type, current state, and recommended action. No login required to triage. No dashboard to babysit. The information arrives where your team already is.
What the numbers mean for WordPress agencies
Monitoring that fits the way agencies actually work.
WordPress agencies don't have a dedicated ops team. You have developers who also manage hosting. Merlonix is built around that constraint — minimal setup, maximum signal, zero dashboards to check between client calls.
30 days
SSL expiry warning lead time — enough runway to renew without client impact
< 10 min
Time from DNS change to alert — before Google re-crawls and flags the issue
11 vendors
Upstream services monitored per account — Stripe, Mailchimp, Cloudflare, and more
250 assets
Maximum monitored domains on the Agency plan — enough for a full client roster
Pricing
Flat monthly fee. Every client domain included.
No per-domain charges. No per-alert fees. Pick the tier that fits your client count and grow without the billing surprises.
Starter
For solo WordPress developers watching a handful of clients.
$19/ month
- 15 monitored assets
- 3 seats
- 5 min check cadence
- SSL + DNS + vendor monitoring
- Email + Slack alerts
Team
For growing agencies with multiple WordPress developers.
$79/ month
- 60 monitored assets
- 10 seats
- 1 min check cadence
- SSL + DNS + vendor monitoring
- Email + Slack alerts
Agency
For agencies with a full client roster of WordPress sites.
$199/ month
- 250 monitored assets
- Unlimited seats
- 1 min check cadence
- SSL + DNS + vendor monitoring
- Email + Slack alerts
Compliance
For regulated-vertical teams that need continuous, audit-ready evidence.
$699/ month
- 500 monitored assets
- Unlimited seats
- 1 min check cadence
- SSL + DNS + vendor monitoring
- Email + Slack alerts
Beyond uptime
More than a 200 OK on every client site
The same account also watches the infrastructure and reputation layers a standard uptime check never reaches — each a live check you can turn on.
Turn monitoring into revenue
Resell client-ready reports as your own
Monitoring doesn’t have to be a cost line. Package the branded report and white-label status page as a deliverable in your retainer — the tooling underneath stays invisible, so to the client the work is yours.
Reports under your brand
Hand each client a polished SSL, DNS, and security report carrying your agency’s name and logo — not ours.
Status pages on their domain
Publish a live status page at status.theirbrand.com with automatic TLS and no “Powered by Merlonix” badge.
Your margin to keep
You pay one add-on cost and package it into the retainer you already bill. The markup — and the margin — are yours.
Common questions
Frequently asked questions
Do I need DNS or registrar access to my clients’ domains to monitor them?
No. Merlonix monitors from the outside in — it probes each domain’s public SSL certificate, DNS records, WHOIS/registration data, and HTTP responses the same way a browser or DNS resolver would. You add an asset by its hostname; no access to the client’s registrar, DNS provider, or servers is required.
What does Merlonix actually check on each site?
Every monitored asset gets continuous SSL-certificate (expiry, issuer, and chain changes), DNS-record, domain-registration/expiry, and uptime monitoring by default. You can also enable infrastructure and reputation checks a standard uptime monitor never reaches — security headers, DNSSEC/DANE, domain-hijack/registrar-lock, blocklist, and cron/heartbeat monitoring — each a live check you turn on per asset.
How often does it check, and how do alerts reach me?
Checks run on your plan’s cadence — as often as every 1 min on Team and above, and every 5 min on Starter. When a certificate, DNS record, registration, or response changes, you get an alert by email and Slack. Alerts fire on real state changes between definitive checks, not on a transient blip.
How much does it cost, and is there a free option?
Yes — there is a free $0 plan (no credit card) to watch a small number of assets, and paid plans start at $19/mo (Starter). You can also start a 14-day full-workspace trial with no card. See the pricing grid above for the assets, seats, and check cadence on each tier.
Stop finding out from clients.
Add your first WordPress client domain in under two minutes. The first SSL or DNS alert tells you whether monitoring was worth it — usually within the first week. 14-day trial, no card required.