diff --git a/mem0-ts/src/oss/src/memory/index.ts b/mem0-ts/src/oss/src/memory/index.ts
index 5cef1c256..8ad92df5c 100644
--- a/mem0-ts/src/oss/src/memory/index.ts
+++ b/mem0-ts/src/oss/src/memory/index.ts
@@ -137,6 +137,27 @@ function rejectTopLevelEntityParams(
   }
 }
 
+const ENTITY_ID_ALIASES: Record<string, string> = {
+  userId: "user_id",
+  agentId: "agent_id",
+  runId: "run_id",
+};
+
+/** Rewrites camelCase entity ids inside filters to the snake_case keys vector stores index on. */
+function normalizeEntityFilterKeys(
+  filters: Record<string, any>,
+): Record<string, any> {
+  const normalized = { ...filters };
+  for (const [camelKey, snakeKey] of Object.entries(ENTITY_ID_ALIASES)) {
+    if (!(camelKey in normalized)) continue;
+    if (normalized[snakeKey] === undefined) {
+      normalized[snakeKey] = normalized[camelKey];
+    }
+    delete normalized[camelKey];
+  }
+  return normalized;
+}
+
 /**
  * Validates and normalizes an entity ID.
  * - Coerces non-string ids (e.g. numeric database keys) to string
@@ -1356,16 +1377,20 @@ export class Memory {
     // receive `agent_id: undefined` / `run_id: undefined` and fail
     // (Qdrant rejects the malformed match, pgvector binds NULL, Redis
     // emits a literal "undefined" string in TAG filters).
+    const requestedFilters = normalizeEntityFilterKeys(config.filters ?? {});
     const normalizedFilters: Record<string, any> = config.filters
       ? Object.fromEntries(
           Object.entries({
-            ...config.filters,
-            user_id: validateAndTrimEntityId(config.filters.user_id, "user_id"),
+            ...requestedFilters,
+            user_id: validateAndTrimEntityId(
+              requestedFilters.user_id,
+              "user_id",
+            ),
             agent_id: validateAndTrimEntityId(
-              config.filters.agent_id,
+              requestedFilters.agent_id,
               "agent_id",
             ),
-            run_id: validateAndTrimEntityId(config.filters.run_id, "run_id"),
+            run_id: validateAndTrimEntityId(requestedFilters.run_id, "run_id"),
           }).filter(([, v]) => v !== undefined),
         )
       : {};
@@ -1864,12 +1889,16 @@ export class Memory {
     // Validate and trim entity IDs in filters. Drop keys that resolve to
     // undefined so downstream vector stores don't receive
     // `agent_id: undefined` / `run_id: undefined` and fail.
+    const requestedFilters = normalizeEntityFilterKeys(config.filters || {});
     const filters: Record<string, any> = Object.fromEntries(
       Object.entries({
-        ...(config.filters || {}),
-        user_id: validateAndTrimEntityId(config.filters?.user_id, "user_id"),
-        agent_id: validateAndTrimEntityId(config.filters?.agent_id, "agent_id"),
-        run_id: validateAndTrimEntityId(config.filters?.run_id, "run_id"),
+        ...requestedFilters,
+        user_id: validateAndTrimEntityId(requestedFilters.user_id, "user_id"),
+        agent_id: validateAndTrimEntityId(
+          requestedFilters.agent_id,
+          "agent_id",
+        ),
+        run_id: validateAndTrimEntityId(requestedFilters.run_id, "run_id"),
       }).filter(([, v]) => v !== undefined),
     );
 
diff --git a/mem0-ts/src/oss/tests/memory.validation.test.ts b/mem0-ts/src/oss/tests/memory.validation.test.ts
index 02aad751f..a80147c2a 100644
--- a/mem0-ts/src/oss/tests/memory.validation.test.ts
+++ b/mem0-ts/src/oss/tests/memory.validation.test.ts
@@ -281,6 +281,66 @@ describe("Memory Input Validation", () => {
     });
   });
 
+  describe("camelCase entity IDs in filters", () => {
+    it("maps camelCase filter keys to snake_case in search", async () => {
+      const searchSpy = jest
+        .spyOn((memory as any).vectorStore, "search")
+        .mockResolvedValue([]);
+
+      await memory.search("q", {
+        filters: { userId: "alice", agentId: "bot", runId: "run-1" },
+      });
+
+      const passedFilters = searchSpy.mock.calls[0][2] as Record<string, any>;
+      expect(passedFilters).toMatchObject({
+        user_id: "alice",
+        agent_id: "bot",
+        run_id: "run-1",
+      });
+      expect(passedFilters.userId).toBeUndefined();
+      expect(passedFilters.agentId).toBeUndefined();
+      expect(passedFilters.runId).toBeUndefined();
+
+      searchSpy.mockRestore();
+    });
+
+    it("maps camelCase filter keys to snake_case in getAll", async () => {
+      const listSpy = jest
+        .spyOn((memory as any).vectorStore, "list")
+        .mockResolvedValue([[], 0]);
+
+      await memory.getAll({ filters: { userId: "alice" } });
+
+      const passedFilters = listSpy.mock.calls[0][0] as Record<string, any>;
+      expect(passedFilters.user_id).toBe("alice");
+      expect(passedFilters.userId).toBeUndefined();
+
+      listSpy.mockRestore();
+    });
+
+    it("prefers an explicit snake_case value over its camelCase alias", async () => {
+      const listSpy = jest
+        .spyOn((memory as any).vectorStore, "list")
+        .mockResolvedValue([[], 0]);
+
+      await memory.getAll({
+        filters: { user_id: "snake", userId: "camel" },
+      });
+
+      const passedFilters = listSpy.mock.calls[0][0] as Record<string, any>;
+      expect(passedFilters.user_id).toBe("snake");
+      expect(passedFilters.userId).toBeUndefined();
+
+      listSpy.mockRestore();
+    });
+
+    it("validates camelCase filter values like their snake_case counterparts", async () => {
+      await expect(
+        memory.search("q", { filters: { userId: "user 123" } }),
+      ).rejects.toThrow("Invalid user_id: cannot contain whitespace");
+    });
+  });
+
   describe("search() filter entity ID validation", () => {
     it("should throw error when user_id in filters is whitespace-only", async () => {
       await expect(