Roundcut Mcp

io.github.Araluma由 GitHub 帳號 Araluma 發布v0.1.2更新於 Oct 24, 2026

Local image tools: circle crop, crop, resize, compress, convert JPG/PNG/WebP/AVIF. By RoundCut.

已驗證STDIO僅桌面檔案與儲存媒體與設計

概覽

AI 產生的概覽

本機 MCP 伺服器，讓助理在自己的電腦上檢視、圓形裁切、裁切、縮放、壓縮與轉換圖片。

可以做什麼
  • 檢視圖片的格式、尺寸、透明通道與 EXIF 方向，方便挑選參數
  • 製作帶圓形透明遮罩的頭像，或依像素框、固定長寬比裁切
  • 依寬度、高度或百分比縮放，並維持長寬比
  • 以相同格式壓縮檔案，或在 JPEG、PNG、WebP、AVIF 之間轉換（輸入也支援 GIF、TIFF、HEIC）
  • 回傳文字摘要、輸出檔案連結、結構化 JSON 與可選的小尺寸 JPEG 預覽
適用情境
適合讓助理準備上傳用圖、頭像、橫幅或網頁圖片，而不必把檔案送到第三方服務。在桌機上處理頭像、比例與格式轉換時很方便。
執行需求
以本機 stdio 程序透過 npx 啟動，需要 Node.js 20 或更新版本。不需帳號、API 金鑰或網路連線；另提供適用於 macOS Apple Silicon 與 Windows x64 的自帶安裝包。
安裝前請注意
工具會在輸入檔旁或指定輸出路徑寫入新的圖片檔，請注意指向正確的目錄。JPEG 不支援透明，透明區域會被填上背景色。超過 80 百萬像素的輸入會被拒絕，輸出檔不保留 EXIF 資訊。

安裝

在 SourceWeft 中

  1. 開啟 儀表板中的 Roundcut Mcp，將其新增到工作區。
  2. 為需要使用其工具的對話啟用該服務。

Desktop only，透過 STDIO。 STDIO 服務會啟動本機處理程序，因此需要 SourceWeft 桌面主機。

其他 MCP 客戶端

參照 儲存庫 中的啟動說明。

README

roundcut-mcp

Local image tools for AI agents, as an MCP server. Circle crop, crop, resize, compress and convert JPG, PNG, WebP and AVIF on your own machine with sharp. No network calls, no accounts, no upload: the files never leave the disk.

Made by RoundCut, the free image tools site (29 languages).

Install

Node 20 or newer.

bash
npx roundcut-mcp

Claude Desktop / Claude Code

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

Claude Code: claude mcp add roundcut -- npx -y roundcut-mcp

Cursor, Windsurf, VS Code

Same shape: a stdio server, command npx, args -y roundcut-mcp.

Smithery

smithery.ai/servers/araluma/roundcut-mcp installs a self-contained bundle for macOS (Apple Silicon) and Windows (x64). On Linux or an Intel Mac, use npx above.

Tools

ToolWhat it doesAn agent calls it when
image_infoFormat, dimensions, alpha, EXIF orientation.the user asks what an image is, or before picking crop/resize numbers
circle_cropRound profile picture: centered square plus a circular transparent mask. size, format (png default), background for jpeg.the user wants a round avatar for Discord, Slack, LinkedIn, WhatsApp or GitHub
crop_imagePixel box (left, top, width, height) or a centered aspect such as 1:1, 4:5, 16:9.the user wants part of an image or a fixed ratio (square post, 4:5 portrait, 16:9 banner)
resize_imageBy width, height or percent. Keeps the aspect ratio, never enlarges unless enlarge: true. Lanczos3.the user gives target pixel dimensions
compress_imageSmaller file, same format. quality for jpg/webp/avif (mozjpeg for jpg), lossless recompression for png.the file must be lighter (upload limit, faster page) at the same size and format
convert_imageTo jpeg, png, webp or avif. Input may also be GIF, TIFF or HEIC. Transparency kept, or flattened onto background for jpeg.the user needs another file type, e.g. iPhone HEIC to JPG, PNG to WebP
roundcut_web_toolsLinks to the browser tools this server does not run locally: background remover, AI upscaler, batch convert, JPG to PDF.the user asks for one of those, instead of declining

Every tool takes an input path and writes next to it by default (photo.jpg becomes photo-circle.png, photo-resized.jpg, photo.webp), or to output. Results carry a text summary, a resource_link to the file, structured JSON (output, format, width, height, bytes, inputBytes) and a small JPEG preview (preview: false to skip it).

Example, from a chat client with the server attached:

Make ~/Pictures/me.jpg a 512 px round avatar as WebP.

calls circle_crop with { "input": "~/Pictures/me.jpg", "size": 512, "format": "webp" } and answers with the file path, the dimensions and the byte count.

Limits

  • Inputs above 80 megapixels are refused, so a stray call cannot allocate gigabytes.
  • EXIF orientation is applied on read; the output is upright and carries no EXIF.
  • jpeg has no alpha: transparent areas are flattened onto background (white by default).

Develop

bash
npm installnpm test        # builds, then node --test

src/engine.ts is the pure image layer (tested directly). src/index.ts adapts it to MCP tools.

Smithery release: scripts/build-mcpb.sh builds build/roundcut-mcp-<version>.mcpb from mcpb/manifest.json (25 MB cap, so only the macOS arm64 and Windows x64 sharp binaries go in), then scripts/publish-smithery.sh uploads it with the tool schemas read from the built server.

License

MIT. Copyright Araluma.

來源：README.md，提交 307336a

工具

0
SourceWeft 尚未在沙箱中啟動過該軟體包，因此其工具未知。

版本歷史

1
  1. v0.1.2最新Sep 16, 2026

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