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call402.com QR Code Generator
x402
call402.com QR Code Generator is a paid API for AI agents from call402.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-29).
Generates a QR code image (SVG or PNG) encoding arbitrary text or URLs, delivered as a pay-per-call API via the x402 protocol on Base mainnet
Price / call$0.005
Success—
StatusUnknown
How this service works
USDC pay-per-call APIs for AI agents via the x402 protocol (v2, exact, Base mainnet). Send a request, receive HTTP 402 with payment requirements, pay with @x402/fetch or any x402 client, retry with the PAYMENT-SIGNATURE header.
Output
A JSON object containing the rendered QR code image as either an inline SVG string or base64 PNG data, along with metadata: the image size in pixels, the output format, and a meta block indicating the renderer used and the character count of the encoded text.
Example use cases
QR code for a product landing page
“Make a QR code that links to 'https://myproduct.com/launch' — I need it as a 768px SVG so it looks crisp when I embed it in our marketing PDF.”
Event check-in contact card
“Generate a PNG QR code at 256 pixels encoding my vCard text 'BEGIN:VCARD\nFN:Jane Doe\nEMAIL:jane@example.com\nEND:VCARD' so attendees can scan it at the event booth.”
Crypto wallet address QR code
“Create an SVG QR code for my USDC wallet address '0xAbC123…' at 512px so I can display it on my invoice for clients to scan and pay.”
Technical details
Endpoint
POSThttps://call402.com/api/qr-code?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs to programmatically generate a QR code image on demand, especially in autonomous or payment-gated workflows using the x402 protocol. It is well-suited for agents that already use USDC micropayments on Base mainnet and need a fast, low-cost ($0.005) QR code rendered as SVG or PNG without managing a self-hosted encoder.
Side effects
- Text exceeds 2048 characters — request rejected
- Size outside 128-1024px range — validation error
- Invalid format enum value (not svg or png) — bad request
- Payment not provided or signature invalid — HTTP 402 returned with payment requirements
- Malformed JSON body — 400 error
- Network or facilitator timeout — retry may be needed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| size | integer | Image width in px, 128-1024 (default 512) |
| text | string | Content to encode (max 2048 chars) |
| format | string | Default svg |
Output
Schema · Response
{
"type": "json",
"example": {
"meta": {
"renderer": "qrcode (MIT), first-party",
"text_chars": 21
},
"size": 512,
"format": "svg",
"image_svg": "<svg xmlns=...</svg>"
}
}Tags
x402
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