License answers
Can I use CC BY-SA 4.0 commercially, in AI training or with modifications?
Share and adapt for any purpose, including commercially, with credit; adaptations you share must carry the same or a compatible license.
| Use | Answer | Why |
|---|---|---|
| commercial_use | Yes | Permitted, with duties: attribution, license_notice, state_changes, no_additional_restrictions, share_alike. |
| model_training | Needs human review | Creative Commons licenses grant rights to reproduce and adapt the material, with conditions that apply when it or an adaptation is shared. Whether training a model creates an adaptation, and how attribution applies to a trained model or its output, is not settled; Creative Commons notes that training may also fall under exceptions such as fair use. A human reviewer should confirm this use for your case. |
| modification | Yes | Permitted, with duties: attribution, license_notice, state_changes, no_additional_restrictions, share_alike. |
| redistribution | Yes | Permitted, with duties: attribution, license_notice, state_changes, no_additional_restrictions, share_alike. |
| model_inference | Yes | Permitted, with duties: attribution, license_notice, state_changes, no_additional_restrictions, share_alike. |
Duties
attribution, license_notice, state_changes, no_additional_restrictions, share_alike
Check it by API (free, no key)
curl -s https://www.a2ally.com/v1/licenses/check -H 'content-type: application/json' \
-d '{"license":"CC-BY-SA-4.0","intended_use":{"commercial_use":true,"model_training":true}}'MCP: call check_license at https://www.a2ally.com/mcp. Connect your agent · Full reading · Legal text
An automated reading of the license text, not legal advice. Other licenses: all license answers.
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curl -s -X POST https://www.a2ally.com/v1/accounts/signup -H "Content-Type: application/json" -d '{"accept_terms":true}'
export A2ALLY_API_KEY=rs_... # the api_key from the reply (shown once)
curl -s https://www.a2ally.com/v1/licenses/check -H "Authorization: Bearer $A2ALLY_API_KEY" \
-H "Content-Type: application/json" -d '{"license":"MIT","intended_use":{"commercial_use":true}}'