Terms of Service

Summary

HUMMBL is open source software released under the Apache 2.0 license. This website and our MCP servers are provided "as is" without warranty. By using these services, you agree to the terms below.

1. Services

HUMMBL provides the following public services:

• This website (hummbl.io) — documentation and information about the HUMMBL project.
• Public MCP server (mcp-public.hummbl.io) — a free, read-only Model Context Protocol server exposing the Base120 mental model library.
• Base120 model pages (hummbl.io/models/) — static reference pages for 120 mental models.

We may modify, suspend, or discontinue any service at any time without notice.

2. Open Source License

HUMMBL software, including the Base120 mental model library, the MCP server, and the governance framework, is released under the Apache License 2.0. You are free to use, modify, and distribute the software subject to the terms of that license.

The Base120 Canonical Model Registry is governed separately. See the base120 repository for registry-specific terms.

3. Acceptable Use

You agree not to:

• Use the services for any unlawful purpose
• Attempt to disrupt, overload, or gain unauthorized access to the services
• Scrape or bulk-download content in a manner that degrades service for others
• Use the MCP server to send spam, malicious content, or excessive automated requests
• Misrepresent the origin or authorship of HUMMBL content

We may rate-limit or block access for users who violate these terms.

4. MCP Server Usage

The public MCP server (mcp-public.hummbl.io) is provided free of charge for read-only access to the Base120 model library. It is intended for integration with AI tools including ChatGPT, Codex, and the OpenAI Responses API.

The server is rate-limited. No authentication is required. No user data is collected or stored. See our Privacy Policy for details.

Commercial use of the MCP server is permitted under the Apache 2.0 license. If you require higher rate limits, SLA guarantees, or authenticated access, contact us via GitHub Issues.

5. Disclaimer of Warranty

THE SERVICES ARE PROVIDED "AS IS" AND "AS AVAILABLE," WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. WE DO NOT WARRANT THAT THE SERVICES WILL BE UNINTERRUPTED, ERROR-FREE, OR SECURE.

6. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, HUMMBL AND ITS CONTRIBUTORS SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR ANY LOSS OF DATA, PROFITS, OR GOODWILL, ARISING FROM YOUR USE OF (OR INABILITY TO USE) THE SERVICES, REGARDLESS OF THE LEGAL THEORY.

7. Indemnification

You agree to indemnify and hold harmless HUMMBL and its contributors from any claims, damages, or expenses arising from your use of the services or your violation of these terms.

8. Intellectual Property

The HUMMBL name, logo, and brand assets are trademarks of Reuben Bowlby. The software and documentation are licensed under Apache 2.0. The Base120 mental model definitions are part of the open source registry and may be used under the terms of that registry's license.

9. Governing Law

These terms are governed by the laws of the State of Colorado, United States of America, without regard to conflict of law principles. Any disputes shall be resolved in the state or federal courts located in Colorado.

10. Changes to These Terms

We may update these terms from time to time. Changes will be posted on this page with an updated "Last updated" date. Continued use of the services after changes constitutes acceptance of the updated terms. The source for this page is available on GitHub.

11. Contact

Questions about these terms can be directed to GitHub Issues. For legal-specific inquiries, reference "Terms Question" in your issue title.