sualeh/creditcardnumber

Description and use

**Summary**
su aleh/creditcardnumber is a Java library that parses a bank‑issued credit‑card number and returns detailed metadata (issuer, card brand, country, length, Luhn validity, etc.). It can be used to accelerate billing, checkout, or PSP integration by providing instant card‑type validation without calling external services.

**Value**
The library removes the need to build custom regexes or call third‑party APIs for card‑type detection, letting developers embed fast, offline validation directly into payment‑oriented microservices, mobile SDKs, or internal tooling. This speeds up monetisation flows and reduces external dependency latency and cost.

**Practical adoption path**

1. **Proof‑of‑concept** – clone the repo, run the supplied unit tests, and call the main API (CreditCardNumber.parse(...)) with a few sample numbers.
2. **Integration** – add the Maven/Gradle artifact to your project, wrap the library in a thin service layer that fits your existing payment pipeline, and verify that the returned metadata aligns with your PSP’s expectations.
3. **Validation** – run integration tests against your billing or checkout code, and confirm that error handling (e.g., invalid Luhn, unsupported brands) matches your business rules.

**Production readiness**
The project is at a *medium* readiness level: it has solid community interest (85 ★, 33 forks) and recent activity (updated 2026‑07‑01), making it suitable for prototypes or internal workflows. Before production use, perform a dependency audit (check for transitive library vulnerabilities), confirm that the API surface covers all required card brands, and establish a fallback (e.g., external validation) in case the library’s coverage or maintenance changes. Once those checks are done, the library can be safely promoted to production environments.

Use in a workflow

sualeh/creditcardnumber helps integrate monetization, billing, or PSP flows faster.

• integrate billing or checkout
• evaluate PSP flows
• automate payment operations

Limitations and review notes

Medium: useful for prototypes or internal workflows, with dependency and maintenance checks before production.