Shipping THIRI inside something you sell.
The MCP server is free for personal, research and noncommercial use under PolyForm Noncommercial 1.0.0. Putting it inside a product that earns money needs a one-time commercial licence. This page is how you buy one.
Free, no licence needed
- Personal projectsalways
- Research and teachingalways
- Evaluation and prototypesalways
- Internal tools you don't sellalways
- Open-source noncommercial workalways
Install it, read it, fork it, build on it. Nothing below applies until you charge someone for the result.
A licence is required
- Inside a paid productlicence
- In a commercial servicelicence
- Client work you invoice forlicence
- Bundled with hardware you sellsee below
One purchase, perpetual, no renewal. It covers the version you buy and every later release — updates do not re-trigger the fee.
One-time, per company
Headcount is the whole company, not the team using it. If you are unsure which band you are in, take the smaller one and tell us — dennison@bluesprincemedia.com.
What the licence does and does not cover
Covered
The @bluesprincemedia/thiri-mcp server and its client examples — the package published at v0.5.1 and later, and every future release. Use it in commercial products, in client work, and in services you charge for.
Not covered
The harmony engine itself is not distributed and is not part of this licence. The hosted API is licensed separately per key at build.thiri.ai/keys, and the embedded build for hardware is licensed per unit — see hardware licensing.
Buying this does not grant API quota. The two are priced and delivered separately on purpose.
Not the same thing as T.H.I.R.I. Builders
This licence — rights
A one-time, perpetual grant to ship the MCP inside something you sell. Bought once, yours permanently. It does not expire, and it does not depend on your being a member of anything.
Black Card — tools
The paid tier inside T.H.I.R.I. Builders: private repositories and the skills library, the full profiling and research write-ups, priority support and the builders calls, and a raised API key tier. A membership, billed on its own terms.
Neither one requires the other. Membership does not confer commercial rights, and the licence does not include membership — a lapsed membership must never put a shipped product out of licence.
A note on older releases
Versions at or before 0.5.0 were published under the terms they shipped with, and those grants stand — a licence once given cannot be withdrawn. Versions 0.1.0 through 0.3.0 are deprecated on npm and are a July 2026 snapshot: they do not receive fixes, and they are not what the current package is. Anything built on them is on its own. Install 0.5.3 or later.