APIs
Small APIs that keep your website working and correct
Check an email setup, watch for expiring certificates, or turn any page into data. Everything you can do on our free tools, you can do from your code.
One key for everything
Create a key, and every tool works straight away. 100 calls a month free, with no card.
One answer format
Every tool answers with a status, a headline and a list of checks, each with what to do about it.
Alerts when things change
Turn a check into a monitor, and get an email or a signed webhook only when something's new.
Page data
- URL to MarkdownTurn any web page into clean Markdown, for AI tools and notes.
- URL metadataTitle, description, image, favicon and site name from any address.
- Tech stack checkerWhat a website is built and hosted with, from clear fingerprints only.
- Favicon finderFind any site's favicon address, and check that it loads.