With US 82034890, we are replacing our custom REST framework with Jersey and JAX-RS. Since this is a core feature, following libraries were introduced in the com.openexchange.bundles bundle:

com.eclipsesource.jaxrs.provider.multipart_2.0.1.2 01503190702.jar
com.eclipsesource.jaxrs.publisher_4.3.0.2015031907 02.jar
guava-14.0.1.jar
javassist-3.18.1-GA.jar
javax.annotation-api-1.2.0.jar
javax.validation.api-1.1.0.Final.jar
javax.ws.rs-api-2.0.1.jar
org.glassfish.hk2.api-2.4.0-b10.jar
org.glassfish.hk2.external.aopalliance-repackaged-2.4.0-b10.jar
org.glassfish.hk2.external.asm-all-repackaged-5.0.2.jar
org.glassfish.hk2.external.javax.inject-2.4.0-b10.jar
org.glassfish.hk2.locator-2.4.0-b10.jar
org.glassfish.hk2.osgi-resource-locator-1.0.1.jar
org.glassfish.hk2.utils-2.4.0-b10.jar
org.glassfish.jersey.bundles.repackaged.jersey-guava-2.17.jar
org.glassfish.jersey.containers.jersey-container-servlet-core-2.17.jar
org.glassfish.jersey.core.jersey-client-2.17.jar
org.glassfish.jersey.core.jersey-common-2.17.jar
org.glassfish.jersey.core.jersey-server-2.17.jar
org.glassfish.jersey.media.multipart_2.17.jar
org.jvnet.mimepull_1.9.4.jar