The hosted service
The detector is free and runs offline. What you pay for is a place several machines can meet — because a file on your laptop cannot be read by anything that is not your laptop.
24,808 downloads · no card for the free tier
running in three steps
Get a key
POST /v1/keys. No account, no card, no email. It is free forever on one machine.
Point your agent at it
One line in your MCP client config, or pip install laserbrain and call check() in your loop.
Read the verdict
Nine of them. Your agent states where it is; the reading says whether that has moved from where it started.
pip install laserbrain
what it costs, and who each one is for
You, on one laptop, finding out whether this is real. The whole detector — not a trial of it.
A team. The point is not a better detector, it is somewhere the readings from several machines can meet.
Fleets. Collisions between agents, seats, a year of readable history, and returning a drifting agent rather than only watching it.
Bigger than twenty-five machines, or constraints that are not about volume — where the data may live, who may see it, what has to be provable afterwards — is enterprise, and buying it as a company is a different conversation.
what the hosted service does not do
- It does not detect anything the free tier does not. Same grammar, same Φ, same nine verdicts. If one machine is all you run, paying buys you nothing and you should not.
- It does not run a model. There is no inference anywhere in the detector, which is why it works offline, needs no key on the free tier, and returns the same verdict twice for the same input.
- It does not manage your agents. It reports where they are against where they said they were going. It never sets a running agent’s ground, because a supervisor that could choose its own reference would be measuring itself.
- It does not keep your local history hostage. The SDK writes every session to your own disk and keeps it there forever, paid or not.
leaving
Cancel and the paid features stop; the detector does not. It is a pip install and an MIT licence, your local sessions were always yours, and the hosted history is exportable while the account is live. Say so up front and you never have to be asked.