License library / Permissive software
ISC License
Use, copy, modify and distribute for any purpose with or without fee, as long as the copyright and permission notice appear in all copies.
SPDX ISC Version ISC Official text
Uses at a glance
| commercial use | Permitted |
|---|---|
| production deployment | Permitted |
| modification / derivatives | Permitted |
| redistribution | Permitted |
| sublicensing | Not documented |
| AI model training | Needs human review |
| inference-time use (RAG, prompts, generation) | Permitted |
Why some uses need review
AI model training. The license grants broad rights but attaches conditions (such as keeping notices) to copies and adaptations. Whether a trained model, or its output, is a copy or adaptation that carries those conditions is legally unsettled, and in some places training may fall under an exception such as fair use. A human reviewer should confirm this use for your case.
Duties
- give attribution / keep the notice
- license notice
Notes
- Sublicensing is not mentioned, so it is not treated as granted.
Resources under this license
No resource in the registry is published under this license yet.
For agents
curl -s https://www.rightshold.com/v1/licenses/check -H 'content-type: application/json' \
-d '{"license":"ISC","intended_use":{"commercial_use":true,"deployment":true}}'Reading version 2026-10-09 by the Rightshold rights desk; reference hash 04137f312d852b113ae4228663afa9a00fd1a375570bd4b0185a29d54ca20eb4 identifies this license version. The license text governs; this is not legal advice.