MCP QR Code Server

#+TITLE: MCP QR Code Server * Overview Generate QR codes seamlessly using the Model Context Protocol (MCP). This server connects large language models to QR code generation capabilities across multiple client interfaces. * Features - Generate QR codes for multiple content types: - URLs and website links - WiFi network credentials - Contact information (vCard) - Plain text - Calendar events (iCal) - Multiple output formats: - PNG images (base64-encoded) - ASCII/text representation - Data URL format - Customization options: - Size adjustment (100-1000px) - Error correction levels (L, M, Q, H) - Format selection (image, text) * Quick Examples #+begin_example Please generate a QR code for https://example.com #+end_example #+begin_example Generate a QR code for the Wi-Fi network "GuestWiFi" with password "Welcome123" #+end_example #+begin_example Create a QR code for my contact information: Name: John Doe Email: john@example.com Phone: 555-123-4567 #+end_example * Installation #+begin_src bash npm install -g @jwalsh/mcp-server-qrcode #+end_src * Usage ** Claude Desktop #+begin_src json { "mcpServers": { "qrcode": { "command": "npx", "args": [ "-y", "@jwalsh/mcp-server-qrcode" ] } } } #+end_src For detailed setup instructions, please refer to: - [[https://modelcontextprotocol.io/quickstart/user][MCP for Claude Desktop Users]] - [[https://modelcontextprotocol.io/quickstart/server][Building MCP Servers]] - [[https://docs.anthropic.com/en/docs/agents-and-tools/mcp][Anthropic MCP Documentation]] ** Claude Desktop #+begin_src json { "mcpServers": { "qrcode": { "args": [ "-y", "@jwalsh/mcp-server-qrcode" ], "command": "npx" } } } #+end_src ** Emacs with mcp.el #+begin_src elisp :results silent ;; Basic installation with straight.el (use-package mcp :straight (mcp :type git :host github :repo "lizqwerscott/mcp.el")) #+end_src #+begin_src elisp :results silent ;; Connect to the QR code server (mcp-connect-server "qrcode" "npx" '("-y" "@jwalsh/mcp-server-qrcode") :initial-callback (lambda (connection) (message "Connected to %s" (jsonrpc-name connection))) :tools-callback (lambda (connection tools) (message "Available tools: %s" tools))) #+end_src #+begin_src elisp :results raw :wrap example ;; Generate a QR code (let ((connection (gethash "qrcode" mcp-server-connections))) (mcp-call-tool connection "generate-qrcode" '(:content "https://example.com" :format "text"))) #+end_src #+RESULTS: #+begin_example (:content [(:type text :text QR Code for "https://example.com": █████████████████████████████████ █████████████████████████████████ ████ ▄▄▄▄▄ █▄▀ █ ▀ █▀█ ▄▄▄▄▄ ████ ████ █ █ █▄ ▄█▀ ▀█▄█ █ █ ████ ████ █▄▄▄█ █▀ █ ▀█ ███ █▄▄▄█ ████ ████▄▄▄▄▄▄▄█▄▀▄█ █ ▀ █▄▄▄▄▄▄▄████ ████ ▀▄▀▀▀▄▄▀▀ ▄▀▄▀▀ █▀▄▀ ████ ████▄▀█▄▀ ▄▄▀ ▀▀█▄▀▄█▀▄ ▄█▄████ █████▀▀▄ ▄▄▄ ▀ █ ▄█ █ ███▀ ████ ████▄▄▄█▄▄▄▀▄▀█▀ ▄ ▄ ▄▀▀ ▄█▄████ ████▄▄██▄█▄▄▀▄███ █ ▄▄▄ ██▄▀████ ████ ▄▄▄▄▄ █▄█▄▄█▀█▀ █▄█ ██▀ ████ ████ █ █ ██ █▄ ▄█▄▄ ▄▄ █▀ ▄████ ████ █▄▄▄█ █▄ █▀ ▄ ▀ ▄█▄▄████ ████▄▄▄▄▄▄▄█▄▄▄██▄▄█▄█▄██▄██▄████ █████████████████████████████████ █████████████████████████████████ )]) #+end_example ** MCP Inspector #+begin_src bash npx -y @modelcontextprotocol/inspector npx -y @jwalsh/mcp-server-qrcode #+end_src ** NPM Package CLI #+begin_src bash # Verify installation echo '{"method":"tools/list","params":{},"id":1,"jsonrpc":"2.0"}' | mcp-server-qrcode | jq -r '.result.tools[]|.name' #+end_src #+RESULTS: : generate-qrcode #+begin_src bash :results raw :results raw # Generate QR code via JSON-RPC echo '{"method":"tools/call","params":{"name":"generate-qrcode","arguments":{"content":"https://example.com","format":"text"}},"id":1,"jsonrpc":"2.0"}' | mcp-server-qrcode | jq -r '.result.content[0].text' #+end_src #+RESULTS: QR Code for "https://example.com": █████████████████████████████████ █████████████████████████████████ ████ ▄▄▄▄▄ █▄▀ █ ▀ █▀█ ▄▄▄▄▄ ████ ████ █ █ █▄ ▄█▀ ▀█▄█ █ █ ████ ████ █▄▄▄█ █▀ █ ▀█ ███ █▄▄▄█ ████ ████▄▄▄▄▄▄▄█▄▀▄█ █ ▀ █▄▄▄▄▄▄▄████ ████ ▀▄▀▀▀▄▄▀▀ ▄▀▄▀▀ █▀▄▀ ████ ████▄▀█▄▀ ▄▄▀ ▀▀█▄▀▄█▀▄ ▄█▄████ █████▀▀▄ ▄▄▄ ▀ █ ▄█ █ ███▀ ████ ████▄▄▄█▄▄▄▀▄▀█▀ ▄ ▄ ▄▀▀ ▄█▄████ ████▄▄██▄█▄▄▀▄███ █ ▄▄▄ ██▄▀████ ████ ▄▄▄▄▄ █▄█▄▄█▀█▀ █▄█ ██▀ ████ ████ █ █ ██ █▄ ▄█▄▄ ▄▄ █▀ ▄████ ████ █▄▄▄█ █▄ █▀ ▄ ▀ ▄█▄▄████ ████▄▄▄▄▄▄▄█▄▄▄██▄▄█▄█▄██▄██▄████ █████████████████████████████████ █████████████████████████████████ * Developer Documentation For detailed setup, installation, contribution guidelines, and additional integration methods, please refer to [[file:DEVELOPERS.org][DEVELOPERS.org]].