diff --git a/services/collector/src/dto/attribution.dto.ts b/services/collector/src/dto/attribution.dto.ts
index 323a8b1..d6ff3b9 100644
--- a/services/collector/src/dto/attribution.dto.ts
+++ b/services/collector/src/dto/attribution.dto.ts
@@ -1,5 +1,5 @@
 import { ApiProperty } from '@nestjs/swagger';
-import { IsOptional, IsString } from 'class-validator';
+import { IsNumber, IsOptional, IsString } from 'class-validator';
 
 /**
  * UTM attribution parameters (first-touch)
@@ -34,4 +34,14 @@ export class AttributionDto {
   @IsOptional()
   @IsString()
   referrer?: string;
+
+  @ApiProperty({ description: 'Landing page URL at time of attribution capture', required: false })
+  @IsOptional()
+  @IsString()
+  landingPage?: string;
+
+  @ApiProperty({ description: 'Timestamp when attribution was captured (ms since epoch)', required: false })
+  @IsOptional()
+  @IsNumber()
+  capturedAt?: number;
 }
diff --git a/services/collector/src/dto/client-device.dto.ts b/services/collector/src/dto/client-device.dto.ts
index 27bfb8d..69a9a68 100644
--- a/services/collector/src/dto/client-device.dto.ts
+++ b/services/collector/src/dto/client-device.dto.ts
@@ -76,8 +76,17 @@ export class ClientDeviceDto {
   @IsBoolean()
   cookiesEnabled?: boolean;
 
-  @ApiProperty({ description: 'Do Not Track header set', required: false })
+  @ApiProperty({ description: 'Do Not Track header value', required: false })
+  @IsOptional()
+  doNotTrack?: string | boolean | null;
+
+  @ApiProperty({ description: 'Navigator platform string', required: false })
+  @IsOptional()
+  @IsString()
+  platform?: string;
+
+  @ApiProperty({ description: 'Browser online status', required: false })
   @IsOptional()
   @IsBoolean()
-  doNotTrack?: boolean;
+  onLine?: boolean;
 }