Countersign privacy policy

We do not store the work you send. We keep a SHA-256 hash of it, the verdict, and per-check findings (short excerpts such as an equation that is wrong), in a public log. Send private=true and the public log shows only hashes of the findings; you still receive them in the reply. We also keep the agent id you send (or a one-way hash of your network address) and the time, to enforce the free daily limit. We fetch only the public pages you cite. We do not sell or share data.
Service description: /llms.txt