When HubSpot degrades,
your client calls you.
Marketing automation agencies operate at the intersection of client data and third-party platforms. When HubSpot has a partial outage, Mailchimp batches stall, or a custom click-through domain loses its SSL certificate, the failure routes directly to your inbox. Merlonix monitors the platforms and infrastructure so you know first.
No credit card either way — start free, or trial the full workspace.
- Upstream vendors watched
- 11
- Vendor status check cadence
- 5 min
- SSL pre-expiry alert
- 30 days
- Encrypted DNS lookups
- DoH
Where marketing automation agencies get caught out
Three failure modes at the intersection of platforms and domains.
Marketing automation agencies own the configuration layer — vendor credentials, domain settings, DNS records for email auth — but not the platforms themselves. When anything in that stack fails, the failure routes to you even when the root cause is upstream.
Platform concentration
Vendor outages stall campaigns mid-flight
A HubSpot partial outage stalls workflow triggers. A Mailchimp incident holds batch sends in queue. An ActiveCampaign degradation breaks form submissions. These are not rare events — every major marketing automation platform has multiple partial outages per quarter. Merlonix monitors all of them and alerts your team within minutes.
Custom domain SSL
Click-through URLs lose certificates without warning
Marketing automation agencies manage custom sending domains, landing page domains, and click-through redirect domains. SSL certificates on these domains expire or break when DNS changes are made — and a browser warning on a campaign link breaks trust instantly. A ping monitor shows 200 OK until the first visitor gets the error.
Email deliverability
SPF and DKIM drift silently after domain changes
SPF records, DKIM keys, and DMARC policies are set once and forgotten. When a client changes email providers, rebrands a domain, or updates DNS for any reason, these records can be overwritten or dropped. The result is deliverability failures that take days to diagnose. Merlonix diffs DNS against expected records and alerts on TXT record changes immediately.
How it works
One setup per client. Vendor monitoring included on every plan.
Merlonix is designed for agencies managing many client marketing stacks — one account, every domain and vendor, one alert flow that only fires when something actually needs attention.
01
Add your client domains and watch vendors
Verify domain ownership with a DNS TXT record or .well-known file — one attestation per domain. Vendor monitoring (HubSpot, Mailchimp, Stripe, Cloudflare, and 7 more) is automatic on every plan. No additional setup required.
02
SSL, DNS, and vendor status checked every 5 minutes
A DNS-over-HTTPS resolver confirms expected records on every check, including TXT records for SPF and DKIM. SSL is validated end-to-end. All 11 upstream vendor status pages are polled globally and diffed against the last known state.
03
AI classifies changes before alerting
DNS propagation delays and transient vendor API hiccups get classified as noise. Real incidents — SPF record dropped, SSL expired, HubSpot in partial_outage — reach your team. False positives are filtered before they reach your inbox.
04
Alert lands in Slack or email within minutes
Alerts include platform name, incident type, severity, and recommended action. For vendor outages: the affected services and current status. For DNS/SSL: the specific record or certificate field that changed. No login required to triage.
What the numbers mean for marketing automation agencies
Monitoring that covers the full marketing stack.
Marketing automation agencies don't control the platforms — they configure them. That makes vendor status visibility and domain health monitoring the two highest-leverage things you can add to your operational stack without touching client systems.
11 vendors
Upstream platforms monitored — including HubSpot, Mailchimp, Stripe, Cloudflare, Slack, and more
5 min
Vendor status check cadence — faster than most marketing automation platform status pages update
30 days
SSL expiry warning lead time — enough runway to fix before a campaign link triggers a browser warning
250 assets
Maximum monitored domains on the Agency plan — covers sending domains, landing pages, and redirect URLs
Pricing
Flat monthly fee. Every vendor and domain included.
No per-vendor add-ons. No per-domain charges. Vendor monitoring is included on every plan — you pay for the tier, not the breadth.
Starter
For solo marketing automation consultants 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 agencies managing multiple client automation stacks.
$79/ month
- 60 monitored assets
- 10 seats
- 1 min check cadence
- SSL + DNS + vendor monitoring
- Email + Slack alerts
Agency
For agencies running large-scale multi-client automation programs.
$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.
Know before the client calls.
Add your first client domain and start watching your vendor stack in under two minutes. 14-day trial, no card required.