How to install Runtime Cloud in Antigravity CLI
To install Runtime Cloud in Antigravity CLI, add the "runtime-cloud" block to the mcpServers section of ~/.gemini/config/mcp_config.json (remote servers use "serverUrl"), then start agy.
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- 1
Open the MCP config
Create or open ~/.gemini/config/mcp_config.json for every project, or .agents/mcp_config.json for this project only.
- 2
Add the server
Paste this. If the file already has servers, add the "runtime-cloud" entry inside the existing mcpServers block.
{ "mcpServers": { "runtime-cloud": { "command": "npx", "args": [ "-y", "withruntime" ] } } } - 3
Start Antigravity CLI
Run agy. The server and its tools load when the session starts.
Config file: ~/.gemini/config/mcp_config.json (all projects) or .agents/mcp_config.json (this project)
MCP servers run with your permissions. If Runtime Cloud needs an API key, add it under env in the config. Check its README.
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Questions
Does Runtime Cloud work in Antigravity CLI?
Yes. Antigravity CLI supports local and remote mcp servers, skills, plugins, and Runtime Cloud installs with the steps above.
Runtime Cloud does not show up in Antigravity CLI. What now?
Restart Antigravity CLI fully, check the JSON is valid, and make sure Node.js (for npx) is installed. See common MCP errors and fixes.
Is Runtime Cloud safe?
It scores 91 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.
