diff --git a/apps/api/src/knowledge/dto/entry-query.dto.ts b/apps/api/src/knowledge/dto/entry-query.dto.ts
index 5a5f97b..c455838 100644
--- a/apps/api/src/knowledge/dto/entry-query.dto.ts
+++ b/apps/api/src/knowledge/dto/entry-query.dto.ts
@@ -1,6 +1,6 @@
-import { IsOptional, IsEnum, IsString, IsInt, Min, Max } from "class-validator";
+import { IsOptional, IsEnum, IsString, IsInt, IsIn, Min, Max } from "class-validator";
 import { Type } from "class-transformer";
-import { EntryStatus } from "@prisma/client";
+import { EntryStatus, Visibility } from "@prisma/client";
 
 /**
  * DTO for querying knowledge entries (list endpoint)
@@ -10,10 +10,28 @@ export class EntryQueryDto {
   @IsEnum(EntryStatus, { message: "status must be a valid EntryStatus" })
   status?: EntryStatus;
 
+  @IsOptional()
+  @IsEnum(Visibility, { message: "visibility must be a valid Visibility" })
+  visibility?: Visibility;
+
   @IsOptional()
   @IsString({ message: "tag must be a string" })
   tag?: string;
 
+  @IsOptional()
+  @IsString({ message: "search must be a string" })
+  search?: string;
+
+  @IsOptional()
+  @IsIn(["updatedAt", "createdAt", "title"], {
+    message: "sortBy must be updatedAt, createdAt, or title",
+  })
+  sortBy?: "updatedAt" | "createdAt" | "title";
+
+  @IsOptional()
+  @IsIn(["asc", "desc"], { message: "sortOrder must be asc or desc" })
+  sortOrder?: "asc" | "desc";
+
   @IsOptional()
   @Type(() => Number)
   @IsInt({ message: "page must be an integer" })
diff --git a/apps/api/src/knowledge/knowledge.service.ts b/apps/api/src/knowledge/knowledge.service.ts
index f004d91..e1ef04c 100644
--- a/apps/api/src/knowledge/knowledge.service.ts
+++ b/apps/api/src/knowledge/knowledge.service.ts
@@ -48,6 +48,10 @@ export class KnowledgeService {
       where.status = query.status;
     }
 
+    if (query.visibility) {
+      where.visibility = query.visibility;
+    }
+
     if (query.tag) {
       where.tags = {
         some: {
@@ -58,6 +62,20 @@ export class KnowledgeService {
       };
     }
 
+    if (query.search) {
+      where.OR = [
+        { title: { contains: query.search, mode: "insensitive" } },
+        { content: { contains: query.search, mode: "insensitive" } },
+      ];
+    }
+
+    // Build orderBy
+    const sortField = query.sortBy ?? "updatedAt";
+    const sortDirection = query.sortOrder ?? "desc";
+    const orderBy: Prisma.KnowledgeEntryOrderByWithRelationInput = {
+      [sortField]: sortDirection,
+    };
+
     // Get total count
     const total = await this.prisma.knowledgeEntry.count({ where });
 
@@ -71,9 +89,7 @@ export class KnowledgeService {
           },
         },
       },
-      orderBy: {
-        updatedAt: "desc",
-      },
+      orderBy,
       skip,
       take: limit,
     });