OpenAI Codex

Connect OpenAI Codex to Cosmonic Desktop's built-in MCP server via Settings → MCP Server → Install in your AI client, or register it manually (using the daemon binary's path on your platform—macOS shown):

codex mcp add cosmonic -- "/Applications/Cosmonic Desktop.app/Contents/Resources/cosmonicd" mcp serve

Or add it to ~/.codex/config.toml directly:

[mcp_servers.cosmonic]
command = "/Applications/Cosmonic Desktop.app/Contents/Resources/cosmonicd"
args = ["mcp", "serve"]

What Codex can do once connected

Its full tool surface (observe, deploy, build) and the guardrails are covered in Connect Coding Agents; the tools work only while Cosmonic Desktop is running. Desktop can also install the cosmonic-sandbox skill for Codex from the first-run offer or Settings → Agent skills, which lands at the shared ~/.agents/skills/cosmonic-sandbox/.

Next steps

• The server's trust model and tool reference: Connect Coding Agents.
• Sandbox the tool servers your agent calls: Sandbox MCP Servers.