J2Pay

Judgement

What it is

Building block

What it does

A Java library with a common API for card payments across several payment gateways.

Adopt it when

Only if you need a starting point for multi-gateway payments in Java and will maintain it yourself.

Watch out

No releases and no pushes since August 2024.

Ready for

Experimental

Runs as

Library

Built with

Java

How established

Established: started 9 years ago, no tagged release yet.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-03 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: J2Pay → JDK → LLVM project → runs on a microchip

How compilers were built, back to punched paper tape

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