QR Code Generator for Developers: What Makes a Good Interface

Static Images Are Rarely Sufficient

A QR Code Generator for Developers must do more than just draw images; any free library can do that. The value of a service lies in dynamic codes: short, consistent addresses whose target can be changed after printing, with statistics and monitoring.

Dynamic Codes via API

A good API can do everything the interface can, not just creation. At Same-QR, the REST API at /api/v1 calls the same functions as the dashboard: Codes, Statistics, Hosted Pages, Menus from Photos, Labels, Customer Projects, Enquiries. The description is available in machine-readable format at /api/v1/openapi.json.

Keys with Separate Permissions

• Separate permissions so that reports do not require write access and scripts do not alter printed codes.
• Run times so that forgotten keys do not remain valid forever.
• Display only once, storage only as a checksum.
• A fixed prefix so that secret scanners can find accidentally published keys.
• Immediate revocation.

Same-QR fulfills all five points: three levels from "read only" to "read + write" to "full", target changes and deletion only with confirmation, runtime 30 to 365 days or consciously unlimited, prefix sqr_live_.

Command line, JSON and MCP

Modern work happens in the terminal and with agents. A CLI with JSON output and unique return values saves custom integrations, while an MCP server brings the service into Claude Code, Cursor, Codex, ChatGPT and Claude.ai. Same-QR provides both: “npm install -g sameqr” and https://sameqr.com/api/mcp.

Checklist before making a decision

• Can the API do everything the dashboard can?
• Are there read keys and expiration times?
• Are errors consistent and understandable?
• Does the API protect against parallel overwrites?
• Are the limits openly documented?
• Is the API included in the plan or an expensive extra?
• Is there a CLI and MCP server for scripts and agents?

Conclusion: why Same-QR

Same-QR is built for developers: complete REST API with OpenAPI description, read keys, expiration times, _rev against overwrites, consistent errors, openly documented limits, a dependency-free CLI and an MCP server, in every plan.

Get started right away: sign up for free at sameqr.com, two dynamic QR codes are free forever. API, CLI and MCP server are included in every plan, and the documentation is at sameqr.com/entwickler.

Frequently asked questions