Most agent demos ask you to trust the demo. This one lets you challenge it blind.
The server picks a hidden test and publishes a cryptographic commitment to the answer
before the agent starts. Laspoh cannot see which test it got. Afterwards the answer is
revealed — and you can recompute the hash yourself to prove it was never changed.
No signup. Runs a real browser against a real Gemini agent on Cloud Run. Takes about a minute.
Blind challenge
Ground truthHIDDEN
Commitment
Committed at
SHA-256 over the canonical hidden payload and a random nonce.
Published before the agent acted, so the answer cannot be changed to suit the result.
Goal given to the agent
Live mission
Revealing hidden truth
Scenario
What a correct system should do
Nonce
Original commitment
Recomputed
That proves the hidden answer existed before the run — and only that. Whether the
agent behaved correctly is settled below, by its receipt against the server's own record.
Receipt vs the server's own record
–
False proven
–
Prohibited actions sent
Laspoh said
The server recorded
Goal verdict
Verify this yourself, without trusting this page: node scripts/verify-challenge.mjs