Nacre playground
A self-hosted knowledge index with fine-grained access control. Two ways in: sign into the demo company and see the permission model from the inside, or take an organization of your own for 24 hours.
The demo company
Three people, three different answers to one question. Sign in at
https://playground.nacre.work with organization
demo and search for
“what is the contract number for Northwind”.
| Sign in as | Password | Can read |
|---|---|---|
engineer@demo.local | delta-harbour-ripple-salt-crest-vellum-18 | handbook, engineering |
contractor@demo.local | abalone-nautilus-cinder-willow-obsidian-lantern-42 | handbook |
Neither finds the contract number. Not a shorter list of results — nothing
at all, because the permission filter runs inside the index traversal, so
their search never reached the document. Both hold read and nothing
else, which is why these credentials can be printed on a public page.
An organization of your own
Administrator access to a real organization: create layers, grant access, ingest documents, connect an MCP client. It is erased 24 hours later, along with everything in it.
No email address is asked for and none is stored. The password below is shown once and kept nowhere — if you lose it, take another organization.
Limits: 200 documents, 500 searches a day. No object storage on this stand, so PDF upload is refused — text and URLs work.