ProofSnap

ProofSnap captures public websites as digital evidence that anyone can verify later, for lawyers, investigators, compliance and brand protection teams. ProofSnap's own servers load the page, not Claude, and seal a full-page screenshot, the HTML, the page text, metadata and a chain of custody into a signed manifest of SHA-256 hashes with an OpenTimestamps (Bitcoin) proof. On request, an eIDAS qualified timestamp from Disig a.s., a qualified trust service provider on the EU Trusted List, is added.

With ProofSnap in Claude you can:

• Capture one page, or up to 10 pages at once, and see a card with the preview, capture time, manifest SHA-256 and timestamp states
• List, open and verify your stored captures
• Quote the sealed page text, with its hash checked against the signed manifest
• Compare two captures of the same page and seal the result as its own package
• Certify a file by its SHA-256 (the file stays on your device)
• Monitor a website for changes at an interval, on a cron or when the page changes, and ask Claude what changed
• On the Legal plans, create matters, add captures and export a matter as one ZIP with a chain of custody report

You need a ProofSnap API account with a confirmed email address (dashboard at app.getproofsnap.com). It is separate from the ProofSnap browser extension. A new account includes a sandbox of 50 watermarked test captures that are not billed. Live captures count toward your plan's allowance, captures beyond it are billed at the plan's rate, and an eIDAS timestamp costs $1.99 per stamp. Schedules need a paid plan. Before a costly request (an eIDAS timestamp, more than five pages or a schedule that runs more than once a day), ProofSnap returns the cost first and runs the request only after you confirm it.

When you connect, you choose Read only or Read and create. The connector cannot delete anything, change billing or API keys, or see your password. You can disconnect it at any time in the dashboard under Connected AI apps.