CodeCogs vs isEven (humor)

CodeCogs runs a keyless image-rendering service that turns a LaTeX markup string embedded in the URL path into a rendered equation, historically used to drop math into forums, wikis, and emails via a plain <img> tag. It supports PNG, SVG, GIF, PDF, and EMF output, plus a JSON mode that returns the render as base64 alongside a hosted file URL.

isEven is a parody of the infamous is-even npm-package controversy, wrapped as a keyless REST endpoint that answers whether a given number is even. The free tier's JSON response bundles in a joke classified ad alongside the boolean result; a paid Premium/Enterprise tier removes the ads.