# Services from x402-qr-api.vercel.app on Zero

> x402-qr-api.vercel.app serves 11 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/x402-qr-api.vercel.app
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402-qr-api.vercel.app/health.json

## Services

- [QR Code Generator API (x402)](https://www.zero.xyz/c/qr-code-generator-api-x402-c9cd0de7/llms.txt): $0.01/call via x402. Generates a QR code image from a given input (such as a URL or text string) via a paid GET endpoint using the x402 payment protocol.
- [QR Code Generator (x402-qr-api)](https://www.zero.xyz/c/qr-code-generator-x402-qr-api-d495947b/llms.txt): $0.002/call via x402. Converts a URL or text string into a QR code image via a GET request, charged at $0.002 USDC per call using x402 micropayment protocol
- [QR Code Reader API](https://www.zero.xyz/c/qr-code-reader-api-cf968928/llms.txt): $0.005/call via x402. Reads and decodes QR code content from a provided image or URL via a GET request
- [x402 DNS Lookup API](https://www.zero.xyz/c/x402-dns-lookup-api-ad07784e/llms.txt): $0.003/call via x402. Performs a DNS lookup for a given domain and returns DNS record information, payable via the x402 micropayment protocol
- [Text Stats API](https://www.zero.xyz/c/text-stats-api-7b6fb25e/llms.txt): $0.001/call via x402. Returns statistical analysis of a text string, including word count, character count, sentence count, and related metrics
- [x402 QR SSL Certificate Info API](https://www.zero.xyz/c/x402-qr-ssl-certificate-info-api-f1dbcbaa/llms.txt): $0.005/call via x402. Returns SSL/TLS certificate information for a domain, delivered via a micropayment-gated x402 endpoint
- [x402 QR API - Request Headers Endpoint](https://www.zero.xyz/c/x402-qr-api-request-headers-endpoint-3ec1f6dd/llms.txt): $0.003/call via x402. Returns the HTTP request headers received by the server, accessible via x402 micropayment
- [Domain Report API](https://www.zero.xyz/c/domain-report-api-5e90c6e4/llms.txt): $0.03/call via x402. Returns a report with information and analysis about a given domain name
- [x402 QR API Hash Endpoint](https://www.zero.xyz/c/x402-qr-api-hash-endpoint-ec061c48/llms.txt): $0.001/call via x402. Generates or looks up a hash value, likely for QR code content or URL encoding, accessible via x402 micropayment
- [QR Code Validate API](https://www.zero.xyz/c/qr-code-validate-api-3f81fc5d/llms.txt): $0.002/call via x402. Validates a QR code or associated data via an x402-paywall-protected GET endpoint
- [x402 QR API – JWT Endpoint](https://www.zero.xyz/c/x402-qr-api-jwt-endpoint-01956b18/llms.txt): $0.001/call via x402. Issues a JWT token via the x402 micropayment protocol for authenticating QR code API requests

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)