raml-sync.xml

<plugin>
   <groupId>org.apache.maven.plugins</groupId>
   <artifactId>maven-dependency-plugin</artifactId>
   <version>2.10</version>
   <executions>
      <execution>
         <id>unpack</id>
         <phase>generate-sources</phase>
         <goals>
            <goal>unpack</goal>
         </goals>
         <configuration>
            <artifactItems>
               <artifactItem>
                  <groupId>[Anypoint Platform Organisation Id]</groupId>
                  <artifactId>[Exchange Asset Id]</artifactId>
                  <version>[Exchange Asset Version]</version>
                  <type>zip</type>
                  <classifier>fat-raml</classifier>
                  <overWrite>true</overWrite>
                  <outputDirectory>src/main/api/</outputDirectory>
                  <includes>**/*</includes>
               </artifactItem>
            </artifactItems>
         </configuration>
      </execution>
   </executions>
</plugin>

settings.xml

<?xml version="1.0" encoding="UTF-8"?>
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
  <servers>
    <server>
      <id>exchange</id>
      <username>[Anypoint Platform User Name]</username>
      <password>[Anypoint Platform Password]</password>
    </server>
  </servers>
  
  <repositories>
    <repository>
      <id>exchange</id>
      <name>Anypoint Platform Exchange Repository</name>
      <url>https://maven.anypoint.mulesoft.com/api/v1/organizations/[Anypoint Platform Organisation Id]/maven</url>
      <layout>default</layout>
    </repository>
  </repositories>  
  
</settings>