LocalFree

Once MCP server

stringsofthemind-oss/once

Developer assessment/setup MCP; admitted Once boundaries protect writes, not sibling connectors.

0 GitHub stars
Source code

Install Once in Claude Code

Claude Code
claude mcp add stringsofthemind-oss-once -- npx -y @once-agent/mcp
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "stringsofthemind-oss-once": {
      "command": "npx",
      "args": [
        "-y",
        "@once-agent/mcp"
      ]
    }
  }
}

Frequently asked questions

What does the Once MCP server do?

Developer assessment/setup MCP; admitted Once boundaries protect writes, not sibling connectors.

Is the Once MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does Once run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Once to Claude Code?

Run: claude mcp add stringsofthemind-oss-once -- npx -y @once-agent/mcp

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