diff --git a/core/src/main/java/ai/z/openapi/service/model/ModelData.java b/core/src/main/java/ai/z/openapi/service/model/ModelData.java
index fc12c85..81ba43f 100644
--- a/core/src/main/java/ai/z/openapi/service/model/ModelData.java
+++ b/core/src/main/java/ai/z/openapi/service/model/ModelData.java
@@ -1,5 +1,6 @@
 package ai.z.openapi.service.model;
 
+import ai.z.openapi.service.tools.KnowledgeV2Result;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import ai.z.openapi.service.web_search.WebSearchResp;
 import lombok.AllArgsConstructor;
@@ -54,4 +55,6 @@ public final class ModelData {
 
 	private String delta;
 
+	private KnowledgeV2Result knowledgeV2;
+
 }
diff --git a/core/src/main/java/ai/z/openapi/service/model/ToolCalls.java b/core/src/main/java/ai/z/openapi/service/model/ToolCalls.java
index 02a7edc..5bd3165 100644
--- a/core/src/main/java/ai/z/openapi/service/model/ToolCalls.java
+++ b/core/src/main/java/ai/z/openapi/service/model/ToolCalls.java
@@ -1,11 +1,14 @@
 package ai.z.openapi.service.model;
 
+import ai.z.openapi.service.tools.DocReference;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
+import java.util.List;
+
 /**
  * Represents tool calls made by the model during conversation. This class contains
  * information about function calls including the function details, unique identifier, and
@@ -35,4 +38,7 @@ public class ToolCalls {
 	@JsonProperty("mcp")
 	private MCPToolCall mcp;
 
+	@JsonProperty("doc_reference")
+	private List<DocReference> docReferenceList;
+
 }
diff --git a/core/src/main/java/ai/z/openapi/service/tools/DocReference.java b/core/src/main/java/ai/z/openapi/service/tools/DocReference.java
new file mode 100644
index 0000000..6edce1d
--- /dev/null
+++ b/core/src/main/java/ai/z/openapi/service/tools/DocReference.java
@@ -0,0 +1,26 @@
+package ai.z.openapi.service.tools;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.io.Serializable;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class DocReference implements Serializable {
+
+	/** Document index */
+	private Integer index;
+
+	/** Document type */
+	private String doc_type;
+
+	/** Document name */
+	private String doc_name;
+
+}
\ No newline at end of file
diff --git a/core/src/main/java/ai/z/openapi/service/tools/KnowledgeV2Result.java b/core/src/main/java/ai/z/openapi/service/tools/KnowledgeV2Result.java
new file mode 100644
index 0000000..d7bc6cb
--- /dev/null
+++ b/core/src/main/java/ai/z/openapi/service/tools/KnowledgeV2Result.java
@@ -0,0 +1,165 @@
+package ai.z.openapi.service.tools;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.io.Serializable;
+import java.util.List;
+
+/** Knowledge base retrieval V2 result */
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+public class KnowledgeV2Result implements Serializable {
+
+	/** List of data sources */
+	private List<Content> contents;
+
+	/** Query rewrite result */
+	private RewrittenQuery rewritten_query;
+
+	private String type;
+
+	/** Data source */
+	@Data
+	@AllArgsConstructor
+	@NoArgsConstructor
+	public static class Content {
+
+		/** Chunk ID (uuid) */
+		private String id;
+
+		/** Modality type: text, image_url, video_url */
+		private String type;
+
+		/** Text content */
+		private String text;
+
+		/** List of media files in text */
+		private List<Media> medias;
+
+		/** Image URL object */
+		private ImageUrl image_url;
+
+		/** Video URL object */
+		private VideoUrl video_url;
+
+		/** Recall position (rankIndex) */
+		private Integer index;
+
+		/** Recall score (rankScore) */
+		private Double score;
+
+		/** Rerank position (rerankIndex) */
+		private Integer rerank_index;
+
+		/** Rerank score (rerankScore) */
+		private Double rerank_score;
+
+		/** Metadata */
+		private MetadataDTO metadata;
+
+	}
+
+	/** Media file */
+	@Data
+	@AllArgsConstructor
+	@NoArgsConstructor
+	public static class Media {
+
+		/** Image ID */
+		private String id;
+
+		/** Image URL */
+		private String url;
+
+		/** Image description */
+		private String description;
+
+	}
+
+	/** Image URL object */
+	@Data
+	@AllArgsConstructor
+	@NoArgsConstructor
+	public static class ImageUrl {
+
+		/** URL */
+		private String url;
+
+	}
+
+	/** Video URL object */
+	@Data
+	@AllArgsConstructor
+	@NoArgsConstructor
+	public static class VideoUrl {
+
+		/** URL */
+		private String url;
+
+	}
+
+	/** Metadata */
+	@Data
+	@AllArgsConstructor
+	@NoArgsConstructor
+	public static class MetadataDTO {
+
+		/** Chunk ID */
+		private String _id;
+
+		/** Knowledge base ID */
+		private String know_id;
+
+		/** Document ID */
+		private String doc_id;
+
+		/** Document type (dtype) */
+		private String doc_type;
+
+		/** Document name (filename) */
+		private String doc_name;
+
+		/** Document URL */
+		private String doc_url;
+
+		/** Chunk index */
+		private Integer index;
+
+		/** Document page number */
+		private Integer page_index;
+
+		/** Video clip index */
+		private Integer clip_index;
+
+		/** Start frame timestamp */
+		private Long start_time;
+
+		/** End frame timestamp */
+		private Long end_time;
+
+		/** Video clip duration */
+		private Long duration;
+
+		/** Key frame list */
+		private List<Object> frames;
+
+	}
+
+	/** Query rewrite result */
+	@Data
+	@AllArgsConstructor
+	@NoArgsConstructor
+	public static class RewrittenQuery {
+
+		/** Primary query */
+		private String primary_query;
+
+		/** Alternative query list */
+		private List<String> multi_queries;
+
+	}
+
+}