DeepSeek Harness
DeepSeek's open-source agent harness with a local web UI, built so that every tool, model and scheduled task is a swappable plugin; still a developer preview.
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About DeepSeek Harness
DeepSeek Harness is listed in our frameworks category and is aimed at builders. DeepSeek's open-source agent harness with a local web UI, built so that every tool, model and scheduled task is a swappable plugin; still a developer preview. Pricing, as the maker states it: Open source. Maturity: Mature. We last checked the official link on 2026-10-17.
What is DeepSeek Harness?
DeepSeek Harness (dsh) is an open-source agent harness from DeepSeek AI. It is built on an everything-is-a-plugin architecture powered by Cordis, so tools, models and scheduled tasks are swappable plugins.
It starts a local web UI (by default at 127.0.0.1:3080). DeepSeek says it is a developer preview iterating rapidly, with compatibility-breaking changes expected, and asks users to review its safety notice first.
Sources: the official README and our directory listing, checked 2026-10-18. Official site: deepseek.com/harness.
Who is DeepSeek Harness for?
Developers who want to experiment with a plugin-based agent harness and accept breaking changes.
DeepSeek Harness at a glance
- Open source: Yes (MIT License)
- GitHub: deepseek-ai/deepseek-harness · 256,608 stars (as of Oct 21, 2026)
Key features
- Everything-is-a-plugin architecture
- Local web UI
- Swappable tools, models and scheduled tasks
- Developer preview
DeepSeek Harness FAQ
What is DeepSeek Harness?
DeepSeek Harness (dsh) is an open-source agent harness from DeepSeek AI. It is built on an everything-is-a-plugin architecture powered by Cordis, so tools, models and scheduled tasks are swappable plugins.
Who is DeepSeek Harness for?
Developers who want to experiment with a plugin-based agent harness and accept breaking changes.
Is DeepSeek Harness free?
DeepSeek Harness's pricing, as the maker states it: Open source. Open-source tools are free to use, though you may still pay for model API usage or a hosted plan. Check the official site for current plans.
Is DeepSeek Harness open source?
Yes. DeepSeek Harness is released under the MIT License, according to its GitHub repository.
What are alternatives to DeepSeek Harness?
Similar tools include Hermes Agent (Nous Research), OpenHuman, TrueForge, PrivateGPT, thClaws and Orca Agent Engine.
DeepSeek Harness ratings and reviews
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