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How to install three.ws Herald in Gemini CLI
Gemini CLI was replaced by Antigravity CLI in June 2026. On an enterprise licence or paid API key you can still install three.ws Herald by running "gemini mcp add three-ws-herald npx -y @three-ws/herald-mcp", then type /mcp to check it.
Built from the published package · server updated 5 days ago
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Run the install command
In a terminal, run:
gemini mcp add three-ws-herald npx -y @three-ws/herald-mcp - 2
Check it
Inside Gemini CLI, type /mcp to list servers and tools.
MCP servers run with your permissions. If three.ws Herald needs an API key, add it under env in the config. Check its README.
Install three.ws Herald in another app
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Questions
Does three.ws Herald work in Gemini CLI?
Yes. Gemini CLI supports local and remote mcp servers, extensions (legacy), and three.ws Herald installs with the steps above.
three.ws Herald does not show up in Gemini CLI. What now?
Restart Gemini CLI fully, check the JSON is valid, and make sure Node.js (for npx) is installed. See common MCP errors and fixes.
Is three.ws Herald safe?
It scores 82 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.