> ## Documentation Index
> Fetch the complete documentation index at: https://docs.xynthis.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Licensing

> What Free includes, what Pro adds, and how license keys work.

Xynthis is free to use. The Free tier is the full product (the brain, the agent, corpus indexing, the on-device model, the macOS app) with two limits. Pro removes them and adds the cloud features.

## Free vs Pro

|                                 | Free         | Pro               |
| ------------------------------- | ------------ | ----------------- |
| Memory recall window            | Last 7 days  | Unlimited history |
| Agents per task                 | Single agent | Multi-agent       |
| Cloud features (web chat relay) | Not included | Included          |
| Local memory storage            | Unlimited    | Unlimited         |
| Model providers                 | All          | All               |

The 7-day window applies to recall, not storage. Free installations store everything permanently, exactly like Pro: the brain keeps writing memory with no cap. What Free limits is how far back a chat turn or a recall query reaches. Upgrade later and your full history is already there, back to day one.

A Team tier exists for seat-managed licenses; the product limits match Pro.

## Buying a license

Licenses are sold at [xynthis.com](https://xynthis.com). Payment is USDC on the Base network: self-custody, paid straight from your own wallet. You don't need an account before buying: checkout takes an email address, and the license key is delivered to it after the payment confirms.

## Activating

In the app, open Settings → License and paste the key. The app verifies it locally (the key is a signed token checked against a bundled public key, so activation itself needs no network round-trip) and Pro features unlock immediately. A periodic heartbeat to the license server keeps the key current; a machine that goes offline keeps working within a 30-day grace window.

## Expiry and renewal

When a license expires, Xynthis degrades softly to Free. Nothing is deleted: your memory, sessions, and trained models stay exactly where they are, and the recall window simply drops to 7 days until you renew. The app keeps the expired license on record so it can show which plan lapsed and when, and prompts you to renew; signing out dismisses the prompt.

Uninstalling behaves the same way: removing the binaries preserves `~/.xynthis/bmc/`. Your data is only gone if you delete `~/.xynthis` yourself.

## How enforcement works

The license is checked in the app and passed to the local daemon per request, which caps the recall window and gates multi-agent execution for Free-tier turns. Cloud features are gated harder: the web chat relay only connects with a valid, unexpired Pro key, verified server-side. The CLI itself does not take a license key. Tier limits apply through the app; a terminal-only installation runs without one.