A computational engine, and the way it is built.
Qurak evaluates mathematical and symbolic expressions - calculus, differential equations, linear algebra, statistics, optimization, transforms and plots - on the web, over an HTTP API, and as an MCP server an AI assistant can call. The engine's core is built on open-source foundations, behind a service that adds the sandbox, the sessions, the documentation and the API.
Every example on this site was executed by the engine that will run yours, and the outputs shown are what it answered - they are regenerated and checked mechanically, not typed in. The function reference states availability per symbol, including the symbols we do not have. Evaluations run in sandboxed worker processes with file, process and network access refused by policy.
The reference lists thousands of functions this engine does not implement, on the same pages as the ones it does, because the person about to rely on an answer deserves the availability question answered first. The same rule holds on every page here: the quantum page says what the simulator is not, and the organizations page lists the compliance artifacts we do not have yet.
Counted from the reference itself when this build was made, not typed in. Every figure links to the pages it counts.
The interface speaks twenty-two languages, chosen to reach students and engineers the incumbents do not serve in their own language. The function reference itself stays in English, like most of the mathematical literature, and the legal pages bind in English.
Qurak is operated by QURAK.
Two addresses, each with a published PGP key: support@qurak.com for anything technical, hello@qurak.com for everything else. The fingerprints, the keys and how to check them are on the contact page.