Free tier
Get a key
200 trials a month, a 10-asset universe and one holdout evaluation. Enough to take one honest idea through the whole gauntlet. No card.
What happens next
- A $0 checkout. Free and paid signup run through the same path, so the free tier uses the customer record, webhook and key-minting that paid plans already do — one tested flow instead of two.
- Your key, once. Only its SHA-256 is stored. A database dump of this server is not a set of working credentials, which also means a lost key cannot be recovered, only replaced.
- Connect a client. Claude, Cursor or raw HTTP. The quickstart has the config, and there is a prompt if an agent is doing the work.
One tenant per mailbox. Signing up again with the same address — including with a
+tag or extra dots — returns the same tenant and the
same trial count. That is the point: a fresh N on demand would make every
correction this server computes meaningless.
Paying instead?
Pro is $49/month and Team is $399/month — what you get. Start one directly: Pro · Team.
No key needed at all
Every statistic this server computes is open source and runs locally:
pip install quant-integrity. The hosted server adds the trial count you
do not control.