public class GuiceServletConfig extends GuiceServletContextListener {

    @Override
    protected Injector getInjector() {
        return Guice.createInjector(new ServerModule(), new DispatchServletModule());
    }

}

public class ServerModule extends ActionHandlerModule {

    @Override
    protected void configureHandlers() {
        bind(Datastore.class).to(GAEDatastore.class).in(Singleton.class);
        bind(MemCacheManager.class).to(MemCacheManagerImpl.class);
    }

    @Provides
    @Singleton
    public Log getLogger() {
        return new Log4JLogger("tatOnlineLogger");
    }
    ...

public class DispatchServletModule extends GuiceSystemServiceServletModule {
    @Override
    public void configureServlets() {
        super.configureServlets();
         Set<Class<?>> serviceClasses = new HashSet<Class<?>>();
         //v1
         serviceClasses.add(endpointAV1.class);
         serviceClasses.add(endpointBV1.class);

         //v2
         serviceClasses.add(endpointAV2.class);
         serviceClasses.add(endpointBV2.class);


         this.serveGuiceSystemServiceServlet("/_ah/spi/*", serviceClasses);
    }

public class FooEndpointsModule extends EndpointsModule {
  @Override
  public void configureServlets() {
    bind(TestEndpoint.class).toInstance(new TestEndpoint());
    configureEndpoints("/_ah/api/*", ImmutableList.of(TestEndpoint.class));
  }
}

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<web-app xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    version="2.5">

  <servlet>
    <servlet-name>EndpointsServlet</servlet-name>
    <servlet-class>com.google.api.server.spi.EndpointsServlet</servlet-class>
    <init-param>
      <param-name>services</param-name>
      <param-value>com.myendpoints.endpointAV1,com.myendpoints.endpointAV2,com.myendpoints.endpointBV1,com.myendpoints.endpointBV2</param-value>
    </init-param>
    <init-param>
      <param-name>restricted</param-name>
      <param-value>false</param-value>
    </init-param>
  </servlet>

  <servlet-mapping>
    <servlet-name>EndpointsServlet</servlet-name>
    <url-pattern>/_ah/api/*</url-pattern>
  </servlet-mapping>

  <welcome-file-list>
        <welcome-file>index.html</welcome-file>
   </welcome-file-list>

    <filter>
        <filter-name>endpoints-api-configuration</filter-name>
        <filter-class>com.google.api.control.ServiceManagementConfigFilter</filter-class>
    </filter>
    <filter>
        <filter-name>endpoints-api-controller</filter-name>
        <filter-class>com.google.api.control.extensions.appengine.GoogleAppEngineControlFilter</filter-class>
        <init-param>
            <param-name>endpoints.projectId</param-name>
            <param-value>APPID</param-value>
        </init-param>
        <init-param>
            <param-name>endpoints.serviceName</param-name>
            <param-value>APPID.appspot.com</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>endpoints-api-configuration</filter-name>
        <servlet-name>EndpointsServlet</servlet-name>
    </filter-mapping>
    <filter-mapping>
        <filter-name>endpoints-api-controller</filter-name>
        <servlet-name>EndpointsServlet</servlet-name>
    </filter-mapping>
</web-app>

@Override
    public void configureServlets() {
        super.configureServlets();

        bind(Datastore.class).to(GAEDatastore.class).in(Singleton.class);
        bind(MemCacheManager.class).to(MemCacheManagerImpl.class);

         Set<Class<?>> serviceClasses = new HashSet<Class<?>>();
         //v1
         serviceClasses.add(endpointAV1.class);
         serviceClasses.add(endpointBV1.class);

         //v2
         serviceClasses.add(endpointAV2.class);
         serviceClasses.add(endpointBV2.class);

         configureEndpoints("/_ah/api/*", serviceClasses);

    }

    @Provides
    @Singleton
    public Log getLogger() {
        return new Log4JLogger("tatOnlineLogger");
    }
    ...