diff --git a/mem0-ts/src/oss/src/memory/index.ts b/mem0-ts/src/oss/src/memory/index.ts
index 5ad72dd0c..d21951bb3 100644
--- a/mem0-ts/src/oss/src/memory/index.ts
+++ b/mem0-ts/src/oss/src/memory/index.ts
@@ -126,18 +126,19 @@ function rejectTopLevelEntityParams(
 
 /**
  * Validates and normalizes an entity ID.
+ * - Coerces non-string ids (e.g. numeric database keys) to string
  * - Trims leading/trailing whitespace
  * - Rejects empty or whitespace-only strings
  * - Rejects strings containing internal whitespace
- * @returns The trimmed entity ID, or undefined if input is undefined
+ * @returns The trimmed entity ID, or undefined if input is undefined/null
  * @throws Error if entity ID is invalid
  */
 function validateAndTrimEntityId(
-  value: string | undefined,
+  value: string | number | undefined | null,
   name: string,
 ): string | undefined {
-  if (value === undefined) return undefined;
-  const trimmed = value.trim();
+  if (value == null) return undefined;
+  const trimmed = String(value).trim();
   if (trimmed === "") {
     throw new Error(
       `Invalid ${name}: cannot be empty or whitespace-only. Provide a valid identifier.`,
diff --git a/mem0-ts/src/oss/tests/memory.validation.test.ts b/mem0-ts/src/oss/tests/memory.validation.test.ts
index 5503a8902..9efd96b6f 100644
--- a/mem0-ts/src/oss/tests/memory.validation.test.ts
+++ b/mem0-ts/src/oss/tests/memory.validation.test.ts
@@ -253,6 +253,34 @@ describe("Memory Input Validation", () => {
     });
   });
 
+  describe("non-string entity ID coercion", () => {
+    it("coerces an integer user_id in getAll filters to its string form", async () => {
+      const listSpy = jest
+        .spyOn((memory as any).vectorStore, "list")
+        .mockResolvedValue([[], 0]);
+
+      await memory.getAll({ filters: { user_id: 42 as any } });
+
+      const passedFilters = listSpy.mock.calls[0][0] as Record<string, any>;
+      expect(passedFilters.user_id).toBe("42");
+
+      listSpy.mockRestore();
+    });
+
+    it("coerces an integer user_id in search filters to its string form", async () => {
+      const searchSpy = jest
+        .spyOn((memory as any).vectorStore, "search")
+        .mockResolvedValue([]);
+
+      await memory.search("q", { filters: { user_id: 42 as any } });
+
+      const passedFilters = searchSpy.mock.calls[0][2] as Record<string, any>;
+      expect(passedFilters.user_id).toBe("42");
+
+      searchSpy.mockRestore();
+    });
+  });
+
   describe("search() filter entity ID validation", () => {
     it("should throw error when user_id in filters is whitespace-only", async () => {
       await expect(