REA
Reverse engineer anything from your terminal or agent with one CLI and MCP server.
Free styled QR codes, no key: URL, WiFi, contact, text, email. API key adds saved codes + analytics.
Pick the AI app you use, then copy the settings.
Passed 4/4 checks · What you ask goes through the maker’s server (mcp.theqrcode.io) · ✓ Commands checked Nov 13, 2026
First: which AI do you use?
Pick your app and the steps appear below.
Works with Claude · about 2 min
No key, nothing to install · Set it up once on claude.ai or the desktop app, then use it in chat · free accounts can add 1 · on Team/Enterprise an Owner adds it
CustomizeConnectors
Copy each value into the field with the same name in Claude, then click Continue
TheQRCode.iohttps://mcp.theqrcode.io/mcpClick Continue past the sign-in settings Claude detected · under Authentication choose what the maker says (Sign in now, Sign in when needed or No sign in), then click Add
+ConnectorsTheQRCode.io
Use TheQRCode.io and tell me what you can do for me, then show me one thing✓ If Claude says it is using TheQRCode.io or shows a TheQRCode.io tool in the answer, you are connected
Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with ChatGPT, depending on your plan
Full MCP: ChatGPT Business, Enterprise or Edu on the web · Pro: connects with read/fetch permissions, so tools that change data may not work · Plus: not confirmed in OpenAI’s docs; if you see an add-custom-MCP option on the Plugins page you can try these steps · web only
Plugins+Add custom MCP server
Enter a name, paste the address under Connection, tick the risk warning and click Create as a plugin
TheQRCode.iohttps://mcp.theqrcode.io/mcpStart a new chat and pick TheQRCode.io from your plugins before typing
Use TheQRCode.io and tell me what you can do for me, then show me one thing✓ If ChatGPT says it is using TheQRCode.io or shows a TheQRCode.io tool in the answer, you are connected
Menu names checked against OpenAI’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with Claude Code · about 2 min
No key, nothing to install
Mac: press Command+Space and type Terminal · Windows: open PowerShell
claude mcp add --transport http --scope user qr-code-generator https://mcp.theqrcode.io/mcpYou should see TheQRCode.io listed as connected
Use TheQRCode.io and tell me what you can do for me, then show me one thing✓ If Claude Code says it is using TheQRCode.io or shows a TheQRCode.io tool in the answer, you are connected
Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with Cursor · about 2 min
No key, nothing to install
Use TheQRCode.io and tell me what you can do for me, then show me one thing✓ If Cursor says it is using TheQRCode.io or shows a TheQRCode.io tool in the answer, you are connected
Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with VS Code · about 2 min
No key, nothing to install
Use TheQRCode.io and tell me what you can do for me, then show me one thing✓ If VS Code says it is using TheQRCode.io or shows a TheQRCode.io tool in the answer, you are connected
Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.
Address for apps that connect over the web
https://mcp.theqrcode.io/mcpJSON settings are under “For developers” below
Claude Code
claude mcp add --transport http --scope user qr-code-generator https://mcp.theqrcode.io/mcpCursor (~/.cursor/mcp.json)
{
"mcpServers": {
"qr-code-generator": {
"url": "https://mcp.theqrcode.io/mcp"
}
}
}VS Code (mcp.json)
{
"servers": {
"qr-code-generator": {
"type": "http",
"url": "https://mcp.theqrcode.io/mcp"
}
}
}These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.
Connect over the internet in
ClaudeChatGPTGooseLM StudioMsty StudioCherry StudioCursorVS Code + GitHub CopilotVisual StudioWindsurf (Devin Desktop)ZedKiroClineContinueJetBrains AI AssistantClaude CodeCodex CLIGemini CLIOpenCodenodecodeWarpLibreChatOpen WebUIRaycast
Tool names and descriptions exactly as the server reported them on Nov 13, 2026. The maker wrote them, not us; we show them as plain text.
generate_qr_codeGenerate a QR code image. Use this whenever a user asks to create, make, or generate a QR code for a URL, website, WiFi network, contact card, email, or text. Returns a hosted image URL and a base64 data URL for inline display. Colour, size, dot and corner styling, frames and cap
list_qr_codesList QR codes saved to the authenticated user's account. Supports pagination and filtering by type. Requires an authenticated API key (Developer plan).
get_analyticsGet scan analytics for the authenticated user's QR codes. Optionally filter to a specific QR code by ID. Requires an authenticated API key (Developer plan).
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 13, 2026
The registry name was verified against the domain theqrcode.io (the registry checks domain ownership)
Code last changed 21 days ago
Not applicable: a cloud server run by the owner of theqrcode.io; you don't run code from the repo
Responded in 423 ms (HTTP 200)
No sign-in needed
Read 3 tool descriptions and found no hidden instructions to the AI
Ask, share a tip or report that it does not work. Sorted by what people marked helpful.
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Posts here are written by users, not the PopNx team.
No reviews yet
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
It passed 4 of 4 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
The registry does not list a required key, though some servers ask you to sign in on first use.
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
The GitHub repo last changed 21 days ago, and the latest version (1.5.2) reached the registry 31 days ago.
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT on the web (full MCP on Business and above; Pro read-only).
Servers in the same category from other makers, sorted by stars.
Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Reverse engineer anything from your terminal or agent with one CLI and MCP server.
A powerful toolkit for coding, providing semantic retrieval and editing capabilities.
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
Generate QR codes — and read their scan analytics — from Claude, Cursor, or any MCP client.
Remote HTTP server. Nothing to install. No npm, no Docker, no Python. Point your client at one URL and ask.
https://mcp.theqrcode.io/mcp
Listed in the official MCP Registry as `io.theqrcode/qr-code-generator`.
Settings → Developer → Edit Config:
{
"mcpServers": { "theqrcode": { "url": "https://mcp.theqrcode.io/mcp" } } }
~/.cursor/mcp.json:
{
"mcpServers": { "theqrcode": { "url": "https://mcp.theqrcode.io/mcp" } } }
{
"mcpServers": { "theqrcode": { "url": "https://mcp.theqrcode.io/mcp", "headers": { "Authorization": "Bearer YOUR_API_KEY" } } } }
Any client supporting the MCP spec over streamable HTTP works. Restart the client after editing config, then just ask: *"Generate a QR code for https://example.com"*.
Three tools. All three are advertised to every session — including anonymous ones, so directory crawlers see the real surface — but the two account tools refuse at call time without a key.
generate_qr_code — free, no key| Param | Type | Required | Notes | |||||
|---|---|---|---|---|---|---|---|---|
type | url \ | wifi \ | contact \ | text \ | email | yes | all five free, no key | |
content | string | yes | the data to encode | |||||
name | string | no | display name when saving to an account | |||||
size | int 64–1024 | no | default 256 | |||||
darkColor | #RRGGBB | no | default #000000 | |||||
lightColor | #RRGGBB | no | default #FFFFFF | |||||
dotStyle | square \ | dots \ | rounded \ | extra-rounded \ | classy \ | classy-rounded | no | module shape |
cornerStyle | square \ | dot \ | extra-rounded | no | the three corner squares | |||
frameStyle | square \ | rounded \ | circle \ | dashed | no | square means no frame | ||
caption | string ≤60 | no | text under the code; implies a frame | |||||
format | png \ | svg \ | pdf | no | default png; svg/pdf need a key |
Returns a hosted image URL plus a base64 data URL for inline display. svg and pdf come back as a data URL in the text response rather than an image block, since a PDF is not one and many clients will not draw an SVG one.
Every design option is free, on every plan and with no key at all — colour, size, dot and corner styling, frames and captions, with no watermark on any output. What the paid plans sell is dynamic codes, analytics, stored-code volume and the managed API. Logo embedding is free too but is not a parameter here: it needs a base64 data URL, which is a poor fit for a tool call.
format: "svg" | "pdf" is the one asymmetry, and it is a cost control rather than a paywall: vector and PDF are the most expensive render path, so they are metered per key instead of per IP. Both are free in the dashboard and in the no-signup generator on theqrcode.io, on every plan.
Anonymous → the public keyless API, 100 requests/hour per IP. The hosted link is a 24-hour preview; download the image rather than bookmarking the URL. The QR code itself never expires — it is the preview *hosting* that is temporary.
Authenticated → the v1 API. The code is saved to your account permanently, rate limited by key rather than IP, and format: "svg" | "pdf" becomes available.
list_qr_codes — Developer planLists codes saved to your account. page, limit (1–100), type filter.
get_analytics — Developer planScan analytics, account-wide or for one qrCodeId. timeRange: 1h, 1d, 7d, 30d (default), 90d, 1y.
Returns total and unique scans, time, approximate location (country/city derived from IP — regional, not GPS), device and OS, and campaign. Static QR codes cannot be tracked; analytics require a dynamic code.
| Anonymous | Developer ($19/mo) | Pro ($29/mo) | |
|---|---|---|---|
generate_qr_code | ✅ all 5 types, full design | ✅ + svg/pdf output | ✅ + svg/pdf output |
| Codes saved to account | ❌ 24h preview link | ✅ permanent | ✅ permanent |
list_qr_codes | ❌ | ✅ | ❌ |
get_analytics | ❌ | ✅ | ❌ |
| MCP rate limit | 100/hr per IP | 2,000/hr per key | 500/hr per key |
MCP calls also count toward the key's 5,000/hr REST API limit; the MCP limit is a cap within it.
API keys: https://theqrcode.io/pricing
The hosted server at mcp.theqrcode.io is the supported path — you do not need to run this. But it is a plain Express app if you want to:
npm install
npm run build npm run start:http # HTTP server on $PORT (or: npm run dev) npm start # one session over stdio, for a local client npm test
Over stdio, set THEQRCODE_API_KEY to unlock the account tools; without it you get the keyless set.
| Env | Default | Purpose |
|---|---|---|
QR_API_BASE | https://theqrcode.io | REST API this server wraps |
PORT | 3001 | listen port (HTTP mode) |
THEQRCODE_API_KEY | — | API key for stdio mode (HTTP takes it per request as a Bearer token) |
Routes: POST|GET|DELETE /mcp (stateless — a fresh server and transport per request), GET /health.
Docker:
docker build -t theqrcode-mcp .
docker run -p 3001:3000 -e PORT=3000 theqrcode-mcp
TheQRCode.io is a QR code generation and analytics platform: static and dynamic QR codes for URLs, WiFi, vCard contacts, text and email, with scan analytics by time, device and approximate location. Static codes never expire, printed codes are never switched off to force an upgrade, and the design of a code is never billed for.
This server is one of three ways in — the others are a keyless REST API and OpenAI function calling.
MIT — see LICENSE.