diff --git a/src/main/kotlin/com/depromeet/piki/wishlist/controller/WishlistController.kt b/src/main/kotlin/com/depromeet/piki/wishlist/controller/WishlistController.kt
index 1c3a348a4..5d0ddd844 100644
--- a/src/main/kotlin/com/depromeet/piki/wishlist/controller/WishlistController.kt
+++ b/src/main/kotlin/com/depromeet/piki/wishlist/controller/WishlistController.kt
@@ -3,7 +3,6 @@ package com.depromeet.piki.wishlist.controller
 import com.depromeet.piki.common.response.ApiResponseBody
 import com.depromeet.piki.common.response.PageResponse
 import com.depromeet.piki.image.controller.dto.ConfirmImageUploadRequest
-import com.depromeet.piki.product.source.SourcePlatformResolver
 import com.depromeet.piki.image.controller.dto.PresignedImageUploadRequest
 import com.depromeet.piki.image.controller.dto.PresignedImageUploadResponse
 import com.depromeet.piki.wishlist.controller.dto.WishDetailResponse
@@ -36,10 +35,8 @@ import java.util.UUID
 @RequestMapping("/api/v1/wishlists")
 class WishlistController(
     private val wishlistService: WishlistService,
-    private val sourcePlatformResolver: SourcePlatformResolver,
 ) : WishlistApi {
-    private fun toResponse(result: WishWithItem): WishItemResponse =
-        WishItemResponse.from(result.wish, result.item, result.snapshot, sourcePlatformResolver.resolve(result.item.link))
+    private fun toResponse(result: WishWithItem): WishItemResponse = WishItemResponse.from(result)
 
     @PostMapping
     @ResponseStatus(HttpStatus.CREATED)
@@ -49,7 +46,7 @@ class WishlistController(
     ): ApiResponseBody<WishItemResponse> {
         val result = wishlistService.registerFromUrl(rawUrl = request.url, userId = userId)
         return ApiResponseBody.created(
-            WishItemResponse.fromRegistration(result, sourcePlatformResolver.resolve(result.item.link)),
+            WishItemResponse.fromRegistration(result),
         )
     }
 
@@ -93,7 +90,7 @@ class WishlistController(
     ): ApiResponseBody<WishDetailResponse> {
         val result = wishlistService.getWish(userId = userId, wishId = wishId)
         return ApiResponseBody.ok(
-            WishDetailResponse.from(result, sourcePlatformResolver.resolve(result.item.link), requesterId = userId),
+            WishDetailResponse.from(result, requesterId = userId),
         )
     }
 
diff --git a/src/main/kotlin/com/depromeet/piki/wishlist/controller/dto/WishDetailResponse.kt b/src/main/kotlin/com/depromeet/piki/wishlist/controller/dto/WishDetailResponse.kt
index 77e5ca4a8..473b06850 100644
--- a/src/main/kotlin/com/depromeet/piki/wishlist/controller/dto/WishDetailResponse.kt
+++ b/src/main/kotlin/com/depromeet/piki/wishlist/controller/dto/WishDetailResponse.kt
@@ -35,17 +35,15 @@ data class WishDetailResponse(
     val priceHistory: List<PriceHistoryEntry>,
 ) {
     companion object {
-        // sourcePlatform 은 SourcePlatformResolver(빈)의 판정이라 호출부(컨트롤러)가 풀어 넘긴다.
         // requesterId 는 editedByMe(수기 버전을 내가 넣었는지) 파생용 — 편집자 식별자(UUID)는 응답에 노출하지 않는다.
         fun from(
             detail: WishDetail,
-            sourcePlatform: String?,
             requesterId: UUID,
         ): WishDetailResponse =
             WishDetailResponse(
                 wish = WishItemResponse.WishView.from(detail.wish),
                 memo = detail.wish.memo,
-                item = WishItemResponse.ItemView.from(detail.item, detail.snapshot, sourcePlatform),
+                item = WishItemResponse.ItemView.from(detail.item, detail.snapshot, detail.sourcePlatform),
                 priceHistory = detail.history.map { PriceHistoryEntry.from(it, requesterId) },
             )
     }
diff --git a/src/main/kotlin/com/depromeet/piki/wishlist/controller/dto/WishItemResponse.kt b/src/main/kotlin/com/depromeet/piki/wishlist/controller/dto/WishItemResponse.kt
index 91b66271c..946105510 100644
--- a/src/main/kotlin/com/depromeet/piki/wishlist/controller/dto/WishItemResponse.kt
+++ b/src/main/kotlin/com/depromeet/piki/wishlist/controller/dto/WishItemResponse.kt
@@ -33,25 +33,19 @@ data class WishItemResponse(
 ) {
     companion object {
         fun from(
-            wish: Wish,
-            item: Item,
-            snapshot: ItemSnapshot,
-            sourcePlatform: String?,
+            result: WishWithItem,
         ): WishItemResponse =
             WishItemResponse(
-                wish = WishView.from(wish),
-                item = ItemView.from(item, snapshot, sourcePlatform),
+                wish = WishView.from(result.wish),
+                item = ItemView.from(result),
             )
 
         // URL 등록 응답 전용 — 공유 attach 메타(#853)까지 싣는다. 등록만 이 오버로드를 쓰고,
         // 목록·수정 등 다른 경로는 위 기본 from(플래그 null)을 유지한다.
-        fun fromRegistration(
-            result: WishWithItem,
-            sourcePlatform: String?,
-        ): WishItemResponse =
+        fun fromRegistration(result: WishWithItem): WishItemResponse =
             WishItemResponse(
                 wish = WishView.from(result.wish),
-                item = ItemView.from(result.item, result.snapshot, sourcePlatform),
+                item = ItemView.from(result),
                 reused = result.reused,
                 refreshNeeded = result.refreshNeeded,
             )
@@ -123,7 +117,8 @@ data class WishItemResponse(
         companion object {
             // 표시값(status·name·price·currency·imageUrl)은 활성 snapshot 에서,
             // 정체성(id·sourceUrl=상품 링크)은 item 에서 읽는다. snapshot 은 5단계 갱신에서 새 버전으로 스왑된다.
-            // sourcePlatform 은 SourcePlatformResolver(빈)의 판정이라 호출부(컨트롤러)가 풀어 넘긴다.
+            fun from(result: WishWithItem): ItemView = from(result.item, result.snapshot, result.sourcePlatform)
+
             fun from(
                 item: Item,
                 snapshot: ItemSnapshot,
diff --git a/src/main/kotlin/com/depromeet/piki/wishlist/service/WishlistService.kt b/src/main/kotlin/com/depromeet/piki/wishlist/service/WishlistService.kt
index f6502b6d7..f9e7881d8 100644
--- a/src/main/kotlin/com/depromeet/piki/wishlist/service/WishlistService.kt
+++ b/src/main/kotlin/com/depromeet/piki/wishlist/service/WishlistService.kt
@@ -15,6 +15,7 @@ import com.depromeet.piki.item.repository.ItemSnapshotRepository
 import com.depromeet.piki.item.service.ItemDisplayService
 import com.depromeet.piki.item.service.ItemRegistrar
 import com.depromeet.piki.product.domain.ProductLink
+import com.depromeet.piki.product.source.SourcePlatformResolver
 import com.depromeet.piki.user.domain.IdentityType
 import com.depromeet.piki.user.service.UserService
 import com.depromeet.piki.wishlist.domain.WishCursor
@@ -43,8 +44,11 @@ class WishlistService(
     private val itemDisplayService: ItemDisplayService,
     private val itemQuotaGuard: ItemQuotaGuard,
     private val userService: UserService,
+    private val sourcePlatformResolver: SourcePlatformResolver,
 ) {
 
+    private fun WishWithItem.withSourcePlatform(): WishWithItem = copy(sourcePlatform = sourcePlatformResolver.resolve(item.link))
+
     // TODO AOP
     private fun requireMember(userId: UUID) {
         val user = userService.findActiveById(userId)
@@ -59,7 +63,7 @@ class WishlistService(
         val link = ProductLink.parse(rawUrl)
         wishPersistenceService.rejectIfAlreadyRegistered(userId, link)
         itemRegistrar.accept(link, userId)
-        return wishPersistenceService.persist(userId, link)
+        return wishPersistenceService.persist(userId, link).withSourcePlatform()
     }
 
     fun presignImageUploads(
@@ -79,9 +83,10 @@ class WishlistService(
         requireMember(userId)
         if (imageKeys.size !in MIN_IMAGE_COUNT..MAX_IMAGE_COUNT) throw WishException.invalidImageCount()
         imagePresignService.verifyUploaded(imageKeys)
-        return imageKeys.mapNotNull { key ->
-            skippingDuplicateKey(Item.SOURCE_IMAGE_KEY_UNIQUE) { wishPersistenceService.registerImage(key, userId) }
-        }
+        return imageKeys
+            .mapNotNull { key ->
+                skippingDuplicateKey(Item.SOURCE_IMAGE_KEY_UNIQUE) { wishPersistenceService.registerImage(key, userId) }
+            }.map { it.withSourcePlatform() }
     }
 
     @Transactional(readOnly = true)
@@ -106,7 +111,11 @@ class WishlistService(
             pageWishes.map { wish ->
                 // item 은 wish 와 함께 영속화되며 병합 시 함께 옮겨진다(WishItemMergeListener). 없으면 영속화 경로가 깨진 코드 버그다.
                 val item = itemsById[wish.itemId] ?: error("wish ${wish.getId()} 의 item ${wish.itemId} 가 없다")
-                WishWithItem(wish = wish, item = item, snapshot = displayByCard.getValue(wish.displayCard()))
+                WishWithItem(
+                    wish = wish,
+                    item = item,
+                    snapshot = displayByCard.getValue(wish.displayCard()),
+                ).withSourcePlatform()
             }
 
         val nextCursor =
@@ -141,6 +150,7 @@ class WishlistService(
             item = item,
             snapshot = itemDisplayService.resolveDisplay(wish.displayCard()),
             history = history,
+            sourcePlatform = sourcePlatformResolver.resolve(item.link),
         )
     }
 
@@ -163,7 +173,7 @@ class WishlistService(
         if (listOfNotNull(name, price, currency, image).isEmpty()) {
             memo?.let {
                 // 응답의 item 은 updateMemo 가 행 락 안에서 표시값(#857)으로 맞춰 돌려준다.
-                return wishPersistenceService.updateMemo(userId = userId, wishId = wishId, memo = it)
+                return wishPersistenceService.updateMemo(userId = userId, wishId = wishId, memo = it).withSourcePlatform()
             }
         }
         // 이미지 형식 검증(빈 바이트·미지원 MIME) — 외부 호출 전에 동기로 거른다(400).
@@ -186,7 +196,7 @@ class WishlistService(
             imageUrl = imageUrl,
             currency = currency,
             memo = memo,
-        )
+        ).withSourcePlatform()
     }
 
     // 위시 item 의 상품 정보를 원본 링크로 재추출해 최신화한다(수동 새로고침). 추출(Gemini)은 디스패처가 비동기로
@@ -201,7 +211,7 @@ class WishlistService(
         // refresh 계약 검증(링크 없음·FAILED 항목 등)은 persistence 안쪽이라 여기선 앞서 깎이는데, 그 두 사유는
         // 클라가 refresh 버튼을 띄우지 않는 상태라 정상 흐름에서 반복 호출되지 않는다.
         itemQuotaGuard.consume(userId, 1, ItemErrorCode.QUOTA_EXCEEDED)
-        return wishPersistenceService.refresh(userId = userId, wishId = wishId)
+        return wishPersistenceService.refresh(userId = userId, wishId = wishId).withSourcePlatform()
     }
 
     // 멱등 삭제: 없거나 이미 삭제됐으면 "이미 목표 상태(없음)"이므로 성공으로 본다(no-op).
diff --git a/src/main/kotlin/com/depromeet/piki/wishlist/service/dto/WishDetail.kt b/src/main/kotlin/com/depromeet/piki/wishlist/service/dto/WishDetail.kt
index 70eb1c678..f63d7c84e 100644
--- a/src/main/kotlin/com/depromeet/piki/wishlist/service/dto/WishDetail.kt
+++ b/src/main/kotlin/com/depromeet/piki/wishlist/service/dto/WishDetail.kt
@@ -16,4 +16,5 @@ data class WishDetail(
     val item: Item,
     val snapshot: ItemSnapshot,
     val history: List<ItemSnapshot>,
+    val sourcePlatform: String?,
 )
diff --git a/src/main/kotlin/com/depromeet/piki/wishlist/service/dto/WishWithItem.kt b/src/main/kotlin/com/depromeet/piki/wishlist/service/dto/WishWithItem.kt
index e2420c600..e42fbb0b4 100644
--- a/src/main/kotlin/com/depromeet/piki/wishlist/service/dto/WishWithItem.kt
+++ b/src/main/kotlin/com/depromeet/piki/wishlist/service/dto/WishWithItem.kt
@@ -7,10 +7,12 @@ import com.depromeet.piki.wishlist.domain.Wish
 // wish 기록과 그 wish 가 가리키는 상품의 정체성(item)·활성 버전(snapshot) 묶음. 등록 결과·조회 항목이 공유한다.
 // 표시값(name/price/image/status)은 snapshot 에서, 정체성(id·sourceUrl=link)은 item 에서 온다.
 // reused·refreshNeeded 는 공유 등록(#853)의 attach 메타 — 등록 경로만 채우고 그 외(조회·수기 수정 등)는 기본값 false.
+// sourcePlatform 은 응답 경계(WishlistService)가 링크에서 판정해 채운다. 영속화 계층은 비워 둔다.
 data class WishWithItem(
     val wish: Wish,
     val item: Item,
     val snapshot: ItemSnapshot,
     val reused: Boolean = false,
     val refreshNeeded: Boolean = false,
+    val sourcePlatform: String? = null,
 )
diff --git a/src/test/kotlin/com/depromeet/piki/wishlist/controller/WishDisplayIntegrationTest.kt b/src/test/kotlin/com/depromeet/piki/wishlist/controller/WishDisplayIntegrationTest.kt
index 1ec548944..f6d1f267e 100644
--- a/src/test/kotlin/com/depromeet/piki/wishlist/controller/WishDisplayIntegrationTest.kt
+++ b/src/test/kotlin/com/depromeet/piki/wishlist/controller/WishDisplayIntegrationTest.kt
@@ -62,6 +62,7 @@ class WishDisplayIntegrationTest : IntegrationTestSupport() {
             .andExpect(status().isOk)
             .andExpect(jsonPath("$.data[0].item.name").value("새 기계값"))
             .andExpect(jsonPath("$.data[0].item.price").value(90_000))
+            .andExpect(jsonPath("$.data[0].item.sourcePlatform").value("example"))
         mockMvc
             .perform(get("/api/v1/wishlists/$wishId").header(HttpHeaders.AUTHORIZATION, "Bearer ${memberToken(userA)}"))
             .andExpect(status().isOk)