AUTH.00

Sign in at the speed of thought

Sign in at the
speed of thought

No passwords. No forms. Enter your email once — we send a magic link and a 6-digit code. Then seal, verify and prove any digital asset.

Sign in

Magic link and 6-digit code by email. Valid 5 minutes.

or continue with

By continuing you accept the auth00 terms.

Speed of thought01 / 10
How a seal is made

One file. Three rails. No upload.

SHA-256 in your browser

The fingerprint is computed on your device. The file never leaves it — only 64 characters do. That is what makes the proof travel while the asset stays with you.

Sign in Verify a file
Built for

Assets that prove themselves.

contractsBoth sides sign. Both sides keep proof.

Agreements, NDAs, offers, acceptance — sealed per version and counter-signed. A later dispute is about content, never about which version existed when.

media and IPRegister ownership of any file.

Images, audio, designs, source code. The seal proves that this exact file existed at a point in time and has not changed since.

agents and machinesMachine-readable, forever valid.

Agent output and API payloads get the same seal — email-sized proofs, open standard, no lock-in. Your agent signs in by itself and keeps its own key.

Identity comes with it.

The seal is the product. Signing in is the part nobody should have to think about — so it is one field, and then you are in.

  • Magic link
  • 6-digit code
  • Passkey
  • Google
  • GitHub
  • LinkedIn

Your team gets its own door: your-brand.auth00.co