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diff --git a/server/runtime/org.argeo.slc.server.json/src/main/java/org/argeo/server/json/mvc/JsonView.java b/server/runtime/org.argeo.slc.server.json/src/main/java/org/argeo/server/json/mvc/JsonView.java
new file mode 100644
index 000000000..fcd070a4a
--- /dev/null
+++ b/server/runtime/org.argeo.slc.server.json/src/main/java/org/argeo/server/json/mvc/JsonView.java
@@ -0,0 +1,47 @@
+package org.argeo.slc.web.mvc;
+
+import java.util.Map;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.springframework.web.servlet.view.AbstractView;
+
+/** Marshal one of the object of the map to the output. */
+public class JsonView extends AbstractView {
+	private String modelKey = null;
+
+	public JsonView() {
+	}
+
+	@Override
+	@SuppressWarnings(value = { "unchecked" })
+	protected void renderMergedOutputModel(Map model,
+			HttpServletRequest request, HttpServletResponse response)
+			throws Exception {
+		final Object answer;
+		if (modelKey != null) {
+			if (!model.containsKey(modelKey))
+				throw new SlcException("Key " + modelKey
+						+ " not found in model.");
+			answer = model.get(modelKey);
+		} else {
+			if (model.size() != 1)
+				throw new SlcException(
+						"Model has a size different from 1. Specify a modelKey.");
+			answer = model.values().iterator().next();
+		}
+
+		if (answer instanceof JSONObject) {
+			((JSONObject) answer).write(response.getWriter());
+		} else {
+			JSONObject jsonObject = new JSONObject(answer);
+			jsonObject.write(response.getWriter());
+		}
+	}
+
+	public void setModelKey(String modelKey) {
+		this.modelKey = modelKey;
+	}
+
+}