Free to use.
Yours to run.

Umbra Agent is open-source software released under the MIT license. There's no account, no subscription, and no service agreement — you download it and run it yourself, on your own machine, under your own provider keys.

By using Umbra, you agree to these terms.

The agent, the tool layer, and the provider integrations are all MIT-licensed. You're free to use, copy, modify, merge, publish, and distribute it — including for commercial purposes — as long as the license and copyright notice are included.

Full text: see the LICENSE file in the repository.

Umbra is a general-purpose coding agent: it can read, write, and execute code, and run shell commands at your direction. What you instruct it to do, and what you build with it, is entirely your responsibility.

You may not use Umbra to develop malware, to gain unauthorized access to systems, or to attack, exploit, or test systems you don't own or don't have explicit permission to test — or for any other purpose that violates applicable law or a third party's rights.

We don't monitor, review, or have access to how you use the agent, and we accept no responsibility or liability for actions taken with it.

Umbra is provided "as is", without warranty of any kind, express or implied. The agent can edit files and run commands on your machine — review its actions, especially in --exec mode, and keep backups or use version control.

To the maximum extent permitted by law, the authors and contributors are not liable for any claim, damages, or other liability arising from use of the software. See the LICENSE file for the full disclaimer.

Umbra connects to AI model providers and optional tools (OpenAI, Anthropic, Mistral, Ollama, OpenCode Zen, web-search providers, etc.) using credentials you supply. Your use of those services is governed by their own terms — Umbra is not a party to that relationship.

These terms may be updated as the project evolves. Check back here for the current version.

Questions? Reach out at [email protected].