QR Code Generator API

io.github.Br0ski777Published by GitHub account Br0ski777v1.1.0Updated Oct 24, 2026

Generate QR codes from text or URLs. Returns base64 PNG. x402 micropayment.

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Overview

AI-generated overview

Remote MCP endpoint that generates QR codes from text or URLs and returns base64 PNG images, paid per call via x402 USDC micropayments.

What you can do
  • Generate a QR code image from text, a URL, or any string data
  • Set the QR code size in modules, with a default of 21
  • Receive the result as base64 PNG data in a JSON response with width and height
When to use it
Useful when an assistant needs to produce a shareable QR code, such as a link, payment code, Wi-Fi connection code, vCard or event ticket, without running any local tooling. It is a single-purpose service, so it only makes sense if you already accept pay-per-call crypto payments.
Requirements
A remote MCP endpoint added by URL to the client config; no API key or signup. Payment is per call in USDC on the Base L2 network through the x402 protocol, so an x402-aware client with a funded wallet is needed to complete the 402 challenge and retry.
Before you install
Each call costs money (listed at $0.003) and is settled in USDC on Base, so an agent can spend funds automatically. It requires a wallet capable of signing x402 payments, and payment handling is delegated to third-party facilitators. The text or URL you encode is sent to an external service.

Installation

In SourceWeft

  1. Open QR Code Generator API in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via SSE. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.Br0ski777%2Fqr-code/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "qr-code-generator-api": {
      "type": "sse",
      "url": "https://qr-code.api.klymax402.com/mcp"
    }
  }
}

README

QR Code Generator API

[MCP Server] [x402] [License: MIT]

Generate QR codes from text or URLs -- base64 PNG output, configurable size. Fast and lightweight. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

json
{  "mcpServers": {    "qr-code": {      "url": "https://qr-code.api.klymax402.com/mcp"    }  }}

Quickstart -- HTTP (x402)

bash
curl -X POST "https://qr-code.api.klymax402.com/api/qr" \  -H "Content-Type: application/json" \  -d '{"data":"..."}'# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

ToolMethodPathPriceDescription
utility_generate_qr_codePOST/api/qr$0.003Generate a QR code image from text or URL

utility_generate_qr_code

Use this when you need to generate a QR code from text, a URL, or any string data. Returns base64 image data in JSON.

Parameters

NameTypeRequiredDescription
datastringyesThe text or URL to encode in the QR code
sizenumbernoQR code size in modules (default: 21 for version 1)

Example response:

json
{"data":"https://example.com","image":"iVBORw0KGgo...","width":210,"height":210,"format":"png"}

When to use: generating shareable links, payment QR codes, Wi-Fi connection codes, vCard contact sharing, and event ticket barcodes.

Not for: screenshots (use capture_screenshot), PDFs (use document_generate_pdf).

Example agent prompts

  • "Generate a QR code from text, a URL, or any string data"

Payment

  • Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
  • Network: Base L2 (eip155:8453)
  • Asset: USDC
  • Facilitator: Coinbase CDP (primary), PayAI (fallback)
  • Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

License

MIT

Source: README.md at commit 34205b9

Tools

0
SourceWeft has not read this server's tools yet.

Version history

1
  1. v1.1.0LatestSep 16, 2026

Score

50% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declaredRequired10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts