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QR Code Generator API

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

Open source Repository Open in the app JSON README (API)

About

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

Details

Kind
MCP servers
Topic
Finance & crypto
Publisher
br0ski777
Origin
official
Category
ferramentas
Transport
sse
Version
1.1.0
Last push
2026-09-02T19:57:07Z
Repository state
ativo
Language
TypeScript
License
MIT
Added
2026-08-29 03:01:43
Updated
2026-08-29 03:01:43
Origin id
io.github.Br0ski777/qr-code

README

# QR Code Generator API

[![MCP Server](https://img.shields.io/badge/MCP-server-blue)](https://qr-code.api.klymax402.com/mcp)
[![x402](https://img.shields.io/badge/payments-x402-6E56CF)](https://x402.org)
[![License: MIT](https://img.shields.io/badge/license-MIT-green)](LICENSE)

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

Part of the [klymax402](https://klymax402.com) 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`](https://www.npmjs.com/package/@x402/fetch), [`x402-agent-tools`](https://www.npmjs.com/package/x402-agent-tools), ATXP) handles the 402 -> sign -> retry cycle automatically.

## Tools

| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
| `utility_generate_qr_code` | POST | `/api/qr` | $0.003 | Generate 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**

| Name | Type | Required | Description |
|---|---|---|---|
| `data` | string | yes | The text or URL to encode in the QR code |
| `size` | number | no | QR 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](https://x402.org) -- 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](https://atxp.ai) (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.

- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats

## License

MIT

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