Terms of service

These terms cover debuff.jp and the services it runs: the website, the playable demos, and the docs MCP server at https://debuff.jp/mcp. The debuff software itself (the npm packages, CLI, dev tools, MCP server and plugins) is open source under the MIT license. That license, not these terms, governs how you use, copy and change it.

Using the services

You can use debuff.jp and the docs MCP server for free, with or without an AI assistant. The MCP server is read-only: it searches and returns public debuff documentation and nothing else. It needs no account and doesn't receive or store anything from your project.

Please don't overload the services, try to break or get around their limits, or use them to harm others. We may limit or block traffic that does.

Content

The documentation, guides and examples are provided to help you make games with debuff. Code samples in the docs may be used under the same MIT license as debuff. The debuff name, logo and mascot remain ours; please don't use them in a way that suggests we endorse your project.

No warranty

The services and software are provided "as is", without warranty of any kind. We try to keep the docs accurate and the services available, but we can't promise either. To the extent the law allows, we aren't liable for any loss that comes from using them.

Changes

We may update these terms. The current version is always at this address, and the date below shows when it last changed.

Contact

Questions about these terms: ask on Discord or open an issue.

Last updated: 18 October 2026.