DeepSeek Harness
DSH is a plugin framework that allows teams to build their own agent runtime, but lacks API stability and can't handle production deployments.
At a glance
Starts at
Free
Price as published by the vendor, September 2026.
Free tier
Yes, limited
Platforms
Web
Best for
Teams customizing their agent runtime
Not for
Individual creators with complex workflows
4.0 out of 5
Scored by a Toolio reviewer after real useOur verdict
DSH lets you customize your agent’s capabilities with plugins. It suits those who need more control over the environment setup, such as swapping models or sandboxes. However, it's not ideal for stable API requirements or production use.
✓What it does well
ExtensibleExtend functionality with plugins easily.
Workplace CustomizationConfigure memory, tools, and sessions via plugins.
Developer PreviewIncludes a working Web UI and headless runner in developer preview mode.
✕Where it falls short
No API StabilityCore APIs are still changing frequently, not suitable for production.
Limited Web SupportDoesn’t support hosting the UI on a public network.
Free Plan RestrictionsLimited to one task at once and no access to advanced features.
Key features
MIT LicenseOpen-source under MIT license for flexible use.
Cordis FrameworkBuilt on top of Cordis, a plugin framework that manages dependencies.
Cross-Platform CompatibilityRuns with Node.js 22.19+ or 24+, compatible across operating systems.
SOTA Models Accessprovides access to state-of-the-art models