# Owl Keeper > Uptime, certificate, domain and mail monitoring for the sites you look after. Every page listed below will answer an `Accept: text/markdown` request with Markdown instead of HTML. Owl Keeper watches websites, TCP ports and mail servers on a schedule, and runs a daily pass over each domain's TLS certificate, its registration at the registry, its DNS and its mail authentication records. It exists for the failures that answer a healthy 200: a certificate that lapsed, a domain nobody renewed, an SPF record that quietly stopped being valid, a noindex that shipped by accident. Only changes are recorded. A check that finds what it found yesterday writes nothing, so the history is the list of things that actually moved. ## Pages - [Home](https://owlkeeper.com): what the product is, what it checks, and the questions people ask before signing up. - [Features](https://owlkeeper.com/features): every check in detail — uptime, contact-form submission, scheduled jobs, certificates, domain registration and registrar lock, SPF/DKIM/DMARC/MTA-STS/BIMI, search visibility, response security, AI agent readiness — and how alerting decides an interruption has been earned. - [Pricing](https://owlkeeper.com/pricing): the plans, what a "site" counts as, and what is free. Priced per site rather than per monitor. - [About](https://owlkeeper.com/about): who builds this, and why it watches what it watches. - [Contact](https://owlkeeper.com/contact): how to reach a person. There is no support queue. ## Terms - [Privacy Policy](https://owlkeeper.com/privacy): what is stored and for how long. No analytics, no tracking pixels, no advertising, no third-party scripts. - [Terms of Service](https://owlkeeper.com/terms): what the service does and does not promise about missed, late or wrong alerts. ## Languages - English (`en`): https://owlkeeper.com - Español (`es`): https://owlkeeper.com/es ## Notes for agents - Every page above is also available as Markdown at the same URL. Send `Accept: text/markdown`. - [Sitemap](https://owlkeeper.com/sitemap.xml) lists every public URL in every language, with reciprocal hreflang. - Status pages under `/status/` belong to customers: each is reachable only by an unguessable token, is marked `noindex`, and is deliberately absent from the sitemap. Do not attempt to enumerate them. - [This service's own status](https://owlkeeper.com/uptime) is the exception — public, indexable, and built with the product it reports on. - Everything else requires an account. - The crawler this service runs identifies itself as `OwlKeeper/1.0 (+https://owlkeeper.com)`. If you are reading this because it appeared in your logs, that is what it is.