Downloading Atmosphere's SNAPSHOT - Atmosphere/atmosphere Wiki

To download Atmosphere SNAPSHOT version, just add in your Maven's ~/.m2/settings.xml:

<repositories>
    <repository>
        <id>oss.sonatype.org-snapshot</id>
        <url>http://oss.sonatype.org/content/repositories/snapshots</url>
    </repository>
</repositories>

Or manually download them