OpenAS2
What it is
OpenAS2 is a Java server implementation of the EDIINT AS2 standard for exchanging messages between trading partners. It handles EDI-X12, EDIFACT, XML, and binary payloads, with support for signing and encryption algorithms. Listed protocol features include AS2 1.1 conformance, HTTPS transport, compression, and synchronous or asynchronous MDNs. It can process files in parallel for partners with high traffic volumes, run as a server daemon, and support remote control, module self-tests, and load balancer health checks. The project provides Docker build and run instructions; its README specifies Java 11 and later. Sample configuration includes sender and receiver modules, message and MDN storage, database tracking, and a directory resender for failed transmissions. H2 is the default tracking database, and the configuration can be changed for other databases. A health-check module is included but disabled by default. The WebUI connects to the REST API, but its package is deprecated, unsupported, and expected to be removed. OpenAS2 is free and licensed under GPLv3.
For and against
For
- Handles EDI-X12, EDIFACT, XML, and binary payloads.
- Supports signing and encryption algorithms.
- Includes Docker deployment instructions.
- Provides configurable modules and REST API access.
Against
- Requires Java 11 or later.
- WebUI package is deprecated and unsupported.
- Health-check module is disabled by default.
The verdict
OpenAS2 provides server-based AS2 messaging with configurable modules and protocol features. Its WebUI is a notable limitation because it is deprecated and unsupported.
Who it suits
It suits IT teams that need a server for AS2 exchanges with trading partners and can work with Java-based deployment. Teams considering the WebUI should account for its deprecated status.
On the record
- Configurable modules
- The sample configuration includes sender and receiver modules, message and MDN storage, database tracking, and a directory resender for failed transmissions.github.com · read 4 Oct 2026
- Database integration
- The sample configuration uses an embedded H2 database by default for message tracking and allows that setting to be changed for other databases.github.com · read 4 Oct 2026
- Deployment
- The repository provides instructions for building and running the server in Docker containers.github.com · read 4 Oct 2026
- Extensibility
- New modules can be added and extended through XML configuration.sourceforge.net · read 10 Oct 2026
- FDA gateway
- It supports the FDA Automatic Submissions Gateway using custom headers.sourceforge.net · read 10 Oct 2026
- Health monitoring
- The sample configuration includes a health-check module to monitor the OpenAS2 server, disabled by default.github.com · read 4 Oct 2026
- Intended audience
- The project listing identifies Information Technology as its intended audience.sourceforge.net · read 4 Oct 2026
- License
- The project is licensed under GNU General Public License version 3.0 (GPLv3).sourceforge.net · read 10 Oct 2026
- Message exchange
- It transmits and receives AS2 messages containing EDI-X12, EDIFACT, XML, or binary payloads between trading partners.github.com · read 4 Oct 2026
- Message types
- It sends and receives AS2 messages with EDI-X12, EDIFACT, XML, and binary payloads between trading partners.github.com · read 10 Oct 2026
- Operations
- It can run as a server daemon, supports remote control, and includes module self-tests and load balancer health checks.sourceforge.net · read 10 Oct 2026
- Platform support
- The project listing says it runs on any operating system that runs Java.sourceforge.net · read 10 Oct 2026
- Protocol features
- Listed features include AS2 1.1 conformance, HTTPS transport, compression, and synchronous or asynchronous MDNs.sourceforge.net · read 10 Oct 2026
- Purpose
- OpenAS2 is a Java implementation of the EDIINT AS2 standard intended to run as a server.github.com · read 10 Oct 2026
- Runtime requirement
- The project listing requires Java 17 or newer and says it was tested with LTS Java versions through 25.sourceforge.net · read 10 Oct 2026
- Security
- The project describes support for a wide variety of signing and encryption algorithms.github.com · read 10 Oct 2026
- Security capabilities
- The project describes support for a wide variety of signing and encryption algorithms.github.com · read 4 Oct 2026
- Support
- The project directs users to GitHub Issues and Discussions for support.sourceforge.net · read 10 Oct 2026
