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QR Code Generator API

Official registry Developer tools

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

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (sse)
Claude Code 
claude mcp add --transport sse qr-code-generator-api 'https://qr-code.api.klymax402.com/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "qr-code-generator-api": {
            "type": "sse",
            "url": "https://qr-code.api.klymax402.com/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. QR Code Generator API
  2. Quickstart -- MCP
  3. Quickstart -- HTTP (x402)
  4. Tools
  5. Example agent prompts
  6. Payment
  7. Part of klymax402
  8. License

QR Code Generator API

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.):

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

Quickstart -- HTTP (x402)

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:

{"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

Frequently asked questions

What is QR Code Generator API?

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

How do I install QR Code Generator API?

It runs as a remote server. In Claude Code: claude mcp add --transport sse qr-code-generator-api 'https://qr-code.api.klymax402.com/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does QR Code Generator API need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is QR Code Generator API open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains QR Code Generator API?

It is published by Br0ski777. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.