Website Monitoring for Retainer Agencies: How to Include SSL and DNS Coverage

Most agency retainer agreements include some version of "website maintenance" as a line item. The definition of what that covers is rarely precise. It might mean applying WordPress updates. It might mean monitoring uptime. It might mean being available when something breaks. In practice, the ambiguity works against agencies — clients expect more than what was scoped, and agencies undercharge because the deliverable is undefined.

SSL and DNS monitoring is one of the most defensible monitoring deliverables an agency can include in a retainer. The value is concrete, the failure mode is well-understood, and the cost per client is low relative to the risk it prevents. This post is about how to structure that coverage, what to include, and how to report it to clients.

Why SSL and DNS Monitoring Belongs in a Retainer

SSL monitoring is not glamorous. Clients do not understand what it is until something goes wrong. But when something goes wrong — when a client's site displays a browser security warning, when Google marks it as "not secure," when an e-commerce checkout breaks — the agency gets the phone call regardless of whose fault it is.

The case for including SSL and DNS monitoring in a retainer:

It prevents incidents that agencies get blamed for. A client domain that expires, a CNAME that breaks after a registrar migration, a certificate that cannot renew because the DNS is broken — these are not agency errors, but agencies respond to them. Monitoring catches them before they become incidents.

It creates a concrete, reportable deliverable. Monitoring reports give retainer clients something they can see. "We are monitoring your SSL certificate, which expires in 87 days, and your DNS records are intact" is a clearer deliverable than "we are keeping your site maintained."

It differentiates retainers from ad-hoc support. Agencies that include monitoring in retainers can credibly claim they are proactively managing client infrastructure, not just reacting when clients report problems.

The cost is low relative to the risk. At $199/month for Agency-tier monitoring covering 200 assets, an agency monitoring 30 clients pays roughly $6.60/client/month. A single SSL incident that consumes 3 hours of agency time at $150/hour costs $450 — more than the annual monitoring cost for that client.

What to Include in a Monitoring Retainer

Core monitoring deliverables

SSL certificate monitoring: Certificate expiry date tracked continuously. Alert at 30 days before expiry (60 days for client-managed registrars). Certificate chain validation on every check interval — not just expiry.

DNS integrity monitoring: CNAME records verified against expected platform targets on every check. Three independent DNS resolvers to catch propagation inconsistencies. Alert within minutes of a CNAME break.

Domain registration expiry: Registrar-level domain expiry tracked separately from SSL expiry. Alert at 60 days for initial warning, 30 days for escalation to client.

Vendor status correlation: Hosting platform and CDN status monitoring. When a Shopify, Webflow, or Cloudflare incident affects the client, the agency knows the root cause before the client calls.

Scope per client

At minimum, include:

Production domain (apex and www)
Any subdomain the agency manages (staging, API, checkout)

Staging and preview subdomains are worth including explicitly — they affect project delivery and are where most DNS configuration errors occur.

What to exclude from the monitoring deliverable

Monitoring does not cover:

Content updates
Security patching (except as triggered by a monitoring alert)
Performance optimization
Application-level bugs

Being explicit about scope prevents retainer scope creep where "monitoring" gets interpreted as "maintaining everything."

How to Price Monitoring in a Retainer

Option 1: Include at cost in maintenance retainer

Add monitoring cost to the retainer base at direct cost and position it as included infrastructure. This works when:

The retainer is already comprehensive
The agency wants to absorb the cost as part of competitive positioning
Client count is small enough that per-client cost is minimal

Typical structure: "Proactive SSL and DNS monitoring included — we alert you before certificates expire and catch DNS misconfigurations immediately."

Option 2: Include with markup

Add monitoring at 2–3x cost and position it as a managed service with reporting. This works when:

Retainer is a la carte
Client expects itemized billing
Agency provides monthly reporting as part of the line item

Typical structure: "$25–50/month — SSL, DNS, and domain expiry monitoring with monthly status report."

Option 3: Bundle as a standalone monitoring retainer

Offer SSL and DNS monitoring as a standalone product, separate from maintenance work. This works for clients who have in-house technical teams but want external monitoring coverage.

Typical structure: "$99/month — full SSL, DNS, and domain expiry monitoring for your entire web presence. Monthly report included."

The standalone option is particularly effective for clients who have had SSL incidents before — they understand the value proposition concretely.

What to Report to Clients

Monthly monitoring reports should be short and concrete. Clients do not need technical detail — they need confidence that the monitoring is working and any risks are being managed.

Monitoring report structure (1 page):

SSL and DNS Monitoring Report — [Client Name] — [Month Year]

SUMMARY
All systems monitored. No incidents this period.

SSL CERTIFICATES
[domain]          Valid until [date]    [X] days remaining
[subdomain]       Valid until [date]    [X] days remaining

DOMAIN REGISTRATION
[domain]          Expires [date]        [X] days remaining

DNS INTEGRITY
All monitored DNS records verified. No configuration changes detected.

VENDOR STATUS
No platform incidents affecting your monitored services this period.

NEXT ACTION REQUIRED
[None — or: SSL renewal recommended for [domain] within 30 days]

This report takes 5 minutes to generate if the monitoring tool has a data export. It gives clients a tangible artifact from the retainer and creates a paper trail showing proactive management.

When incidents occur, the monitoring report becomes the incident summary:

SSL INCIDENT — [date]

DNS CNAME for [subdomain] changed unexpectedly at [time].
Alert triggered at [time] — [X] minutes after change.
Root cause: Client IT team updated DNS records without agency notification.
Resolution: CNAME restored at [time]. SSL certificate renewed.
Impact: [X] minutes during which staging environment was inaccessible.
Action taken: Added IT team contact to change notification workflow.

Documenting the incident, the response time, and the resolution demonstrates the value of monitoring in concrete terms.

Handling Client-Side DNS Changes

The most common monitoring incident in agency retainers is not a technical failure — it is a client action. The client changes registrars, hands DNS to their IT team, or asks a developer to "clean up the DNS" without notifying the agency.

Establish a DNS change notification protocol at retainer start:

Identify the client DNS contact — who at the client controls DNS, and who authorizes DNS changes
Establish a notification workflow — any DNS change request should come through the agency, or at minimum be notified to the agency before execution
Document the current DNS baseline — record the CNAME targets for all monitored domains at retainer start, so changes are detectable against a known baseline
Include DNS change approval in the retainer scope — position the agency as the DNS configuration authority for managed domains

Agencies that establish this protocol experience fewer DNS-related incidents. The monitoring catches the ones that happen anyway.

Setting Up Monitoring for a New Retainer Client

When a new client joins a retainer, the monitoring setup takes under 15 minutes:

Create a client account in the monitoring tool
Add the client contact for alert routing
Add the production domain — verify ownership via DNS TXT record
Add all managed subdomains (staging, API, checkout)
Document the expected CNAME target for each managed domain
Verify the first monitoring check has run and shows the correct certificate and CNAME data
Send the client a brief confirmation with the domains being monitored

From session 1, the client has documented proof that monitoring is active and covering all managed domains. This sets the expectation that SSL and DNS health is an ongoing deliverable, not a best-effort service.

Merlonix is designed for agency retainer monitoring: client account organization, per-client alert routing, CNAME integrity checks, and exportable status reports built in. Start a free 14-day trial — no credit card required.