diff --git a/src/main/java/cokr/xit/foundation/data/JSON.java b/src/main/java/cokr/xit/foundation/data/JSON.java
index 5263943..963a957 100644
--- a/src/main/java/cokr/xit/foundation/data/JSON.java
+++ b/src/main/java/cokr/xit/foundation/data/JSON.java
@@ -4,6 +4,7 @@ import java.io.InputStream;
 import java.util.Set;
 
 import com.fasterxml.jackson.core.JsonParser.Feature;
+import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.ObjectWriter;
@@ -64,6 +65,14 @@ public class JSON extends AbstractComponent {
 		}
 	}
 
+	public <T> T parse(String json, TypeReference<T> typeRef) {
+		try {
+			return getObjectMapper().readValue(json, typeRef);
+		} catch (Exception e) {
+			throw runtimeException(e);
+		}
+	}
+
 	/**input의 내용을 파싱하여 주어진 클래스의 객체로 변환한다.
 	 * @param <T> 클래스 유형
 	 * @param input JSON input
@@ -78,6 +87,14 @@ public class JSON extends AbstractComponent {
 		}
 	}
 
+	public <T> T parse(InputStream input, TypeReference<T> typeRef) {
+		try {
+			return getObjectMapper().readValue(input, typeRef);
+		} catch (Exception e) {
+			throw runtimeException(e);
+		}
+	}
+
 	/**주어진 객체를 JSON 문자열로 변환한다.
 	 * @param obj 객체
 	 * @return 객체를 변환한 JSON 문자열
diff --git a/src/main/java/cokr/xit/foundation/web/WebClient.java b/src/main/java/cokr/xit/foundation/web/WebClient.java
index d921cca..ac66992 100644
--- a/src/main/java/cokr/xit/foundation/web/WebClient.java
+++ b/src/main/java/cokr/xit/foundation/web/WebClient.java
@@ -29,6 +29,7 @@ import java.util.function.Consumer;
 import javax.net.ssl.SSLContext;
 
 import cokr.xit.foundation.Assert;
+import cokr.xit.foundation.Log;
 import cokr.xit.foundation.data.JSON;
 
 /**서버와의 http 통신을 지원하는 유틸리티.
@@ -468,13 +469,15 @@ public class WebClient {
 
 		private String inJSON() {
 			Object body = bodyData();
+			String str = "";
 			if (!Assert.isEmpty(body))
-				return json().stringify(body);
+				str = json().stringify(body);
+			else if (!Assert.isEmpty(keyValues))
+				str = json().stringify(keyValues);
 
-			if (!Assert.isEmpty(keyValues))
-				return json().stringify(keyValues);
+			Log.get(getClass()).debug("json request:\n{}", str);
 
-			return "";
+			return str;
 		}
 
 		private String encode(String str) {