diff --git a/apps/backend/src/services/claim/claim-service.js b/apps/backend/src/services/claim/claim-service.ts
similarity index 68%
rename from apps/backend/src/services/claim/claim-service.js
rename to apps/backend/src/services/claim/claim-service.ts
index 0882fdc6..5c32645e 100644
--- a/apps/backend/src/services/claim/claim-service.js
+++ b/apps/backend/src/services/claim/claim-service.ts
@@ -3,11 +3,15 @@ import { createClaimToken } from '../../repositories/claim-token-repo.js'
 import { addHours, nowIso } from '../../utils/time.js'
 import { randomToken } from '../../utils/random.js'
 
-export async function createTaskClaimToken(taskId) {
+type TaskClaimToken = NonNullable<Awaited<ReturnType<typeof createClaimToken>>> & {
+  claimUrl: string
+}
+
+export async function createTaskClaimToken(taskId: number | string): Promise<TaskClaimToken> {
   const createdAt = nowIso()
   const expiredAt = addHours(createdAt, Number(runtimeConfig.orders.tokenTtlHours || 24))
   const token = await createClaimToken({
-    taskId,
+    taskId: Number(taskId),
     token: randomToken(24),
     status: 'active',
     expiredAt,
@@ -18,13 +22,17 @@ export async function createTaskClaimToken(taskId) {
     updatedAt: createdAt,
   })
 
+  if (!token) {
+    throw new Error('领取 token 创建失败')
+  }
+
   return {
     ...token,
     claimUrl: buildClaimUrl(token.token),
   }
 }
 
-export function buildClaimUrl(token) {
+export function buildClaimUrl(token: string): string {
   const baseUrl = String(runtimeConfig.orders.claimBaseUrl || '').trim()
   return baseUrl ? `${baseUrl.replace(/\/+$/, '')}/${token}` : token
 }
diff --git a/docs/backend-typescript-migration-plan.md b/docs/backend-typescript-migration-plan.md
index 967fba7a..407419c7 100644
--- a/docs/backend-typescript-migration-plan.md
+++ b/docs/backend-typescript-migration-plan.md
@@ -305,6 +305,13 @@
     - `npm run typecheck`
     - `npm run build`
     - `npm test` 共 128 个用例通过
+42. claim 基础服务迁移到 `.ts`：
+    - `src/services/claim/claim-service.ts`
+43. 领取 token 创建与 claim URL 生成已显式类型化，并在 token 写入失败时显式抛错
+44. Docker 内验证通过：
+    - `npm run typecheck`
+    - `npm run build`
+    - `npm test` 共 128 个用例通过
 
 ## 下一步建议