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How to start the DeepSeek Harness Web UI with one command with DeepSeek Harness

Launch the dsh Web UI on your own machine with a single npx command.

Remote script. npx downloads and runs the published @deepseek-ai/dsh package, so read SAFETY.md before running it.

Who it is forA developer or operator who wants to try the agent harness locally without setting up a repository.

The problemSetting up an agent harness usually means cloning code and building it before anything runs.

The outcomeThe Web UI runs at http://127.0.0.1:3080 on your machine and you can open it in a browser.

What you need first

  • Node.js installed
  • A terminal and a web browser
  • pnpm, if running from source
  • Git, if running from source
  • Review of the SAFETY.md safety notice before running the project

Steps

  1. Install Node.js.
  2. Read SAFETY.md in the repository and confirm you accept the safety notice.
  3. Run npx @deepseek-ai/dsh web
  4. If you do not want a browser window to open, run npx @deepseek-ai/dsh web --no-open and open http://127.0.0.1:3080 yourself. (inferred, check the README)

Prompt for your agent

In the deepseek-harness project, run `npx @deepseek-ai/dsh web --no-open` on <target machine> and report the local URL the server prints. Verify that http://127.0.0.1:3080 returns the Web UI page before reporting success.

Caveat. The project is in developer preview and the README warns that compatibility-breaking changes will happen.

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