Connects to GitHub for package repository access, specifically for the mcp.el Emacs package installation.
Provides integration with npm for package installation and execution of the QR code server through the npm registry.
Offers integration with Emacs Org mode through mcp.el, allowing QR code generation directly within Emacs.
#+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]].
This server cannot be installed
remote-capable server
The server can be hosted and run remotely because it primarily relies on remote services or has no dependency on the local environment.
A server that connects large language models to QR code generation capabilities via Model Context Protocol, supporting multiple content types (URLs, WiFi credentials, contacts, text), output formats, and customization options.
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