Is this site ready for quantum computers?

Checks one site the way a current browser connects to it: whether its encryption would stay private against a future quantum computer (post-quantum key exchange), and what its certificate uses.

Badge for your site. It shows the latest result and links to this check:

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One vantage, once. Witnessory can watch this site from several networks, with history, alerts and signed evidence for auditors: services and prices.

A measurement at one time from one place, not a certification or audit. Results are signed (keys). Nothing about you is kept. From Witnessory; run a probe to measure from your network.

For developers and agents: GET /api/check?domain=example.org returns the signed result as JSON (API description, llms.txt). Up to 20 new checks an hour from one address; a result is reused for 10 minutes. More with a key: plans.