Overwing MCP Server

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local only

Overwing runs on your own machine — the client starts it, so there is no endpoint to ping. Last commit 23 Sep 2026.

Guardrails for LLM output: pass / fail / review verdicts with calibrated confidence in under 500 ms.

—

Installs / week

npm · overwing-mcp

Stars

0 open issues

23 Sep 2026

Last commit

no recent releases

MIT

License

TypeScript

Nothing serious here today

Today is the operative word: we check Overwing every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mcp -- npx -y overwing-mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mcp": {
      "args": [
        "-y",
        "overwing-mcp"
      ],
      "command": "npx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.mcp]
command = "npx"
args = ["-y", "overwing-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "mcp": {
      "args": [
        "-y",
        "overwing-mcp"
      ],
      "command": "npx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "mcp": {
      "args": [
        "-y",
        "overwing-mcp"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: OVERWING_API_KEY (Overwing API key (ow_live_...). Get one at https://overwing.ai/login or POST https://overwing.ai/api/v1/signup), OVERWING_BASE_URL (Override the API base URL for self-hosted deployments (default https://overwing.ai)). The author declared them in the registry entry; get the values from the project itself.

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Overwing — questions

Answers built from our own checks of this server.

Why is there no uptime for Overwing?

Overwing runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package overwing-mcp.

How do I connect Overwing?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls overwing-mcp straight from npm; nothing to host, nothing to sign up for.

Is Overwing open source?

Yes — it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.