Monitoring certificates for customers and projects

A flat list of hostnames stops being readable the moment it mixes your own sites with three customers' staging and production environments. CertWatchr keeps it organised with labels, tags and filters, and lets you onboard a whole customer with one CSV file.

Name each domain with a label

The label is the human-readable name shown in every table and in every alert e-mail. Put the customer or project in it, so a warning at 3 a.m. tells you whose site it is without decoding the hostname:

Hostname	Label	Tags
shop.acme.com	Acme Corp – shop	acme,prod,web
api.acme.com:8443	Acme Corp – API	acme,prod,api
staging.acme.com	Acme Corp – staging	acme,staging

Tag by customer, environment and service

Every domain takes up to ten comma-separated tags. A scheme that works for most teams:

• customer: acme, customer-b
• environment: prod, staging, dev
• service: web, mail, api

Tags are lowercased and de-duplicated for you, so Prod, Web and web,prod are the same. On the domain list they appear under the hostname; click one to see only the domains carrying it.

Filter the list

The filter bar has three controls that combine and stay in effect while you page:

• Search: any part of the hostname or label.
• Status: only what is warning, critical or in error — the "what needs attention today" view.
• Tag: one customer, one environment, one service.

The filters are in the page URL, so /domains?tag=acme&status=warning can be bookmarked or shared with a colleague as "Acme's problems".

Onboard a customer with one file

Use Add domain → Import with a CSV like this:

hostname,port,label,tags,alert_at_days
shop.acme.com,443,Acme Corp – shop,"acme,prod,web",30
api.acme.com,8443,Acme Corp – API,"acme,prod,api",14

Only hostname is required. Rows with mistakes are reported individually and the rest are imported. To hand a customer their list, or move it elsewhere, Export downloads everything including the latest check results. Details in Adding domains.

Different warning lead times per customer

Each domain has its own alert threshold, so a customer with a slow change process can get 60 days' notice while an internal staging host gets 14. Free accounts can set up to 30 days; Starter and Pro up to 365.

Routing alerts per customer

E-mail alerts always go to your account address, and a webhook is one URL and one format per account. Every alert names the hostname, so to send different customers' alerts to different Slack channels, point the webhook at a small endpoint of your own that looks at the hostname and forwards accordingly. See Webhooks.

Quick reference

Field	Purpose	Example values
label	Name shown in tables and alerts	Acme Corp – shop
tags	Comma-separated, for filtering	acme,prod,web
alert_at_days	Days before expiry to warn	30, 60
check_frequency	How often to check	daily, weekly, custom (Pro)