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phase4

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Open-source library

Free

Apache 2.0 licensed · requires manual integration into your system

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On the record

Additional profiles
The documentation lists profiles including BDEW, DBNAlliance, eDelivery2, EESPA, ENTSOG, EUCTP, and HR eDelivery.github.com · read 7 Oct 2026
Configuration
The preferred primary configuration file is application.properties, and system properties and environment variables can also provide configuration.github.com · read 7 Oct 2026
Integration model
phase4 is a library that must be manually integrated into an existing system, rather than a standalone project.github.com · read 7 Oct 2026
Java requirement
The minimum Java version is 17, with Java 21 or later recommended for performance.github.com · read 7 Oct 2026
License
phase4 is licensed under the Apache 2 License.github.com · read 7 Oct 2026
Maintainer
The GitHub profile identifies the maintainer as Philip Helger and lists Vienna, Austria.github.com · read 7 Oct 2026
Operating systems
The maintainer says phase4 works on Windows, Linux, Mac, and AWS.github.com · read 7 Oct 2026
Peppol certificate requirement
Without an official Peppol AP certificate, sending to or receiving from an existing Peppol service provider cannot be tested as described in the testing guide.github.com · read 7 Oct 2026
Protocol profiles
The project lists built-in support for Peppol and CEF eDelivery.github.com · read 7 Oct 2026
Purpose
phase4 is an embeddable Java library for sending and receiving AS4 messages.github.com · read 7 Oct 2026
Security configuration
The documentation describes configuring keystores and truststores, including JKS and PKCS12 formats.github.com · read 7 Oct 2026
Support
The repository says users seeking commercial support can contact the maintainer by email.github.com · read 7 Oct 2026
Testing
The project says it has automated unit and integration tests for many configurations, while testing against a real remote system is different.github.com · read 7 Oct 2026
Unsupported features
AS4 multi-hop and AS4 split and join are listed as not implemented.github.com · read 7 Oct 2026

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