diff --git a/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/BaseExternalOrderValidationDTO.java b/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/BaseExternalOrderValidationDTO.java
new file mode 100644
index 000000000..97152c5f0
--- /dev/null
+++ b/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/BaseExternalOrderValidationDTO.java
@@ -0,0 +1,64 @@
+package com.cloudesire.platform.apiclient.dto.model.dto;
+
+abstract class BaseExternalOrderValidationDTO implements DTO
+{
+    private Integer productId;
+
+    private String productIdentifier;
+
+    private Integer productVersionId;
+
+    private String productVersionIdentifier;
+
+    private String language;
+
+    public Integer getProductId()
+    {
+        return productId;
+    }
+
+    public void setProductId( Integer productId )
+    {
+        this.productId = productId;
+    }
+
+    public String getProductIdentifier()
+    {
+        return productIdentifier;
+    }
+
+    public void setProductIdentifier( String productIdentifier )
+    {
+        this.productIdentifier = productIdentifier;
+    }
+
+    public Integer getProductVersionId()
+    {
+        return productVersionId;
+    }
+
+    public void setProductVersionId( Integer productVersionId )
+    {
+        this.productVersionId = productVersionId;
+    }
+
+    public String getProductVersionIdentifier()
+    {
+        return productVersionIdentifier;
+    }
+
+    public void setProductVersionIdentifier( String productVersionIdentifier )
+    {
+        this.productVersionIdentifier = productVersionIdentifier;
+    }
+
+    public String getLanguage()
+    {
+        return language;
+    }
+
+    public void setLanguage( String language )
+    {
+        this.language = language;
+    }
+}
diff --git a/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/ConfigurationParameterDTO.java b/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/ConfigurationParameterDTO.java
index c38936c8d..8611cb26f 100644
--- a/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/ConfigurationParameterDTO.java
+++ b/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/ConfigurationParameterDTO.java
@@ -4,6 +4,7 @@
 import com.liberologico.cloudesire.common.validators.RegExp;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
+import org.hibernate.validator.constraints.URL;
 
 import javax.validation.constraints.NotEmpty;
 import javax.validation.constraints.Pattern;
@@ -33,6 +34,10 @@ public class ConfigurationParameterDTO extends NamedEntityDTO
     @ApiModelProperty( "Possible labeled values for the parameter" )
     private Map<String, String> acceptedValues;
 
+    @ApiModelProperty( "External endpoint to obtain possible values for the parameter" )
+    @URL
+    private String externalValuesUrl;
+
     @ApiModelProperty( "Short description to help user compiling the correct value" )
     private String hint;
 
@@ -57,7 +62,7 @@ public ConfigurationParameterDTO( String name, Map<String, String> acceptedValue
         this.acceptedValues = acceptedValues;
     }
 
-    private ConfigurationParameterDTO( String name, String description )
+    public ConfigurationParameterDTO( String name, String description )
     {
         super( name );
         this.description = description;
@@ -111,6 +116,17 @@ public ConfigurationParameterDTO setAcceptedValues( Map<String, String> accepted
         return this;
     }
 
+    public String getExternalValuesUrl()
+    {
+        return externalValuesUrl;
+    }
+
+    public ConfigurationParameterDTO setExternalValuesUrl( String externalValuesUrl )
+    {
+        this.externalValuesUrl = externalValuesUrl;
+        return this;
+    }
+
     public String getHint()
     {
         return hint;
diff --git a/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/ConfigurationParameterValueDTO.java b/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/ConfigurationParameterValueDTO.java
new file mode 100644
index 000000000..36ca020ab
--- /dev/null
+++ b/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/ConfigurationParameterValueDTO.java
@@ -0,0 +1,55 @@
+package com.cloudesire.platform.apiclient.dto.model.dto;
+
+import java.util.Objects;
+
+public class ConfigurationParameterValueDTO implements DTO
+{
+    private String value;
+
+    private String description;
+
+    public ConfigurationParameterValueDTO( String value, String description )
+    {
+        this.value = value;
+        this.description = description;
+    }
+
+    public ConfigurationParameterValueDTO()
+    {
+    }
+
+    public String getValue()
+    {
+        return value;
+    }
+
+    public void setValue( String value )
+    {
+        this.value = value;
+    }
+
+    public String getDescription()
+    {
+        return description;
+    }
+
+    public void setDescription( String description )
+    {
+        this.description = description;
+    }
+
+    @Override
+    public boolean equals( Object o )
+    {
+        if ( this == o ) return true;
+        if ( o == null || getClass() != o.getClass() ) return false;
+        ConfigurationParameterValueDTO that = (ConfigurationParameterValueDTO) o;
+        return Objects.equals( value, that.value ) && Objects.equals( description, that.description );
+    }
+
+    @Override
+    public int hashCode()
+    {
+        return Objects.hash( value, description );
+    }
+}
diff --git a/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/ExternalConfigurationParameterValuesRequestDTO.java b/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/ExternalConfigurationParameterValuesRequestDTO.java
new file mode 100644
index 000000000..d607df71e
--- /dev/null
+++ b/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/ExternalConfigurationParameterValuesRequestDTO.java
@@ -0,0 +1,16 @@
+package com.cloudesire.platform.apiclient.dto.model.dto;
+
+public class ExternalConfigurationParameterValuesRequestDTO extends BaseExternalOrderValidationDTO
+{
+    private String configurationParameter;
+
+    public String getConfigurationParameter()
+    {
+        return configurationParameter;
+    }
+
+    public void setConfigurationParameter( String configurationParameter )
+    {
+        this.configurationParameter = configurationParameter;
+    }
+}
diff --git a/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/ExternalOrderValidationDTO.java b/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/ExternalOrderValidationDTO.java
index 01aca672a..fef49e52a 100644
--- a/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/ExternalOrderValidationDTO.java
+++ b/cloudesire-api-client-dto/src/main/java/com/cloudesire/platform/apiclient/dto/model/dto/ExternalOrderValidationDTO.java
@@ -4,16 +4,8 @@
 
 import java.util.Map;
 
-public class ExternalOrderValidationDTO implements DTO
+public class ExternalOrderValidationDTO extends BaseExternalOrderValidationDTO
 {
-    private Integer productId;
-
-    private String productIdentifier;
-
-    private Integer productVersionId;
-
-    private String productVersionIdentifier;
-
     private Map<String, Integer> billingItems;
 
     private Map<String, String> configurationParameters;
@@ -24,48 +16,6 @@ public class ExternalOrderValidationDTO implements DTO
 
     private OrderType orderType;
 
-    private String language;
-
-    public Integer getProductId()
-    {
-        return productId;
-    }
-
-    public void setProductId( Integer productId )
-    {
-        this.productId = productId;
-    }
-
-    public String getProductIdentifier()
-    {
-        return productIdentifier;
-    }
-
-    public void setProductIdentifier( String productIdentifier )
-    {
-        this.productIdentifier = productIdentifier;
-    }
-
-    public Integer getProductVersionId()
-    {
-        return productVersionId;
-    }
-
-    public void setProductVersionId( Integer productVersionId )
-    {
-        this.productVersionId = productVersionId;
-    }
-
-    public String getProductVersionIdentifier()
-    {
-        return productVersionIdentifier;
-    }
-
-    public void setProductVersionIdentifier( String productVersionIdentifier )
-    {
-        this.productVersionIdentifier = productVersionIdentifier;
-    }
-
     public Map<String, Integer> getBillingItems()
     {
         return billingItems;
@@ -115,14 +65,4 @@ public void setOrderType( OrderType orderType )
     {
         this.orderType = orderType;
     }
-
-    public String getLanguage()
-    {
-        return language;
-    }
-
-    public void setLanguage( String language )
-    {
-        this.language = language;
-    }
 }
diff --git a/cloudesire-api-client/src/main/java/com/cloudesire/platform/apiclient/api/ConfigurationParameterApi.java b/cloudesire-api-client/src/main/java/com/cloudesire/platform/apiclient/api/ConfigurationParameterApi.java
index 1d15f65ff..12125c60c 100644
--- a/cloudesire-api-client/src/main/java/com/cloudesire/platform/apiclient/api/ConfigurationParameterApi.java
+++ b/cloudesire-api-client/src/main/java/com/cloudesire/platform/apiclient/api/ConfigurationParameterApi.java
@@ -1,12 +1,20 @@
 package com.cloudesire.platform.apiclient.api;
 
 import com.cloudesire.platform.apiclient.dto.model.dto.ConfigurationParameterDTO;
+import com.cloudesire.platform.apiclient.dto.model.dto.ConfigurationParameterValueDTO;
 import retrofit2.Call;
 import retrofit2.http.GET;
+import retrofit2.http.POST;
 import retrofit2.http.Path;
+import retrofit2.http.Query;
+
+import java.util.List;
 
 public interface ConfigurationParameterApi
 {
     @GET( "configurationParameter/{id}" )
     Call<ConfigurationParameterDTO> get( @Path( "id" ) int id );
+
+    @POST( "configurationParameter/{id}/values" )
+    Call<List<ConfigurationParameterValueDTO>> getValues( @Path( "id" ) int id, @Query( "productVersionId" ) int productVersionId );
 }