diff --git a/hwe/sammo/API/Global/GetCachedMap.php b/hwe/sammo/API/Global/GetCachedMap.php
index a41aa452..8735a01d 100644
--- a/hwe/sammo/API/Global/GetCachedMap.php
+++ b/hwe/sammo/API/Global/GetCachedMap.php
@@ -41,7 +41,7 @@ class GetCachedMap extends \sammo\BaseAPI
 
   public function getRequiredSessionMode(): int
   {
-    return static::NO_SESSION;
+    return static::DUMMY_SESSION;
   }
 
   public function launch(Session $session, ?DateTimeInterface $modifiedSince, ?string $reqEtag)
diff --git a/hwe/sammo/API/Global/GetConst.php b/hwe/sammo/API/Global/GetConst.php
index 970cf14a..e1913101 100644
--- a/hwe/sammo/API/Global/GetConst.php
+++ b/hwe/sammo/API/Global/GetConst.php
@@ -32,7 +32,7 @@ class GetConst extends \sammo\BaseAPI
 
     public function getRequiredSessionMode(): int
     {
-        return static::REQ_LOGIN | static::REQ_READ_ONLY;
+        return static::DUMMY_SESSION;
     }
 
     public function findLastModified(): ?int
diff --git a/src/sammo/API/Login/LoginByID.php b/src/sammo/API/Login/LoginByID.php
index 3e4ed269..a71519bf 100644
--- a/src/sammo/API/Login/LoginByID.php
+++ b/src/sammo/API/Login/LoginByID.php
@@ -32,7 +32,7 @@ class LoginByID extends \sammo\BaseAPI
 
     public function getRequiredSessionMode(): int
     {
-        return BaseAPI::NO_SESSION;
+        return BaseAPI::NO_LOGIN;
     }
 
     public function scrubToken(int $userID)
diff --git a/src/sammo/API/Login/LoginByToken.php b/src/sammo/API/Login/LoginByToken.php
index cc3593b1..af8a9333 100644
--- a/src/sammo/API/Login/LoginByToken.php
+++ b/src/sammo/API/Login/LoginByToken.php
@@ -17,7 +17,7 @@ class LoginByToken extends LoginByID
 
     public function getRequiredSessionMode(): int
     {
-        return \sammo\BaseAPI::NO_SESSION; //XXX: Token 때문에 엄밀히는 NO_SESSION이 아님
+        return \sammo\BaseAPI::NO_LOGIN;
     }
 
     public function validateArgs(): ?string
diff --git a/src/sammo/API/Login/ReqNonce.php b/src/sammo/API/Login/ReqNonce.php
index 1b4d24bf..4c04fa7e 100644
--- a/src/sammo/API/Login/ReqNonce.php
+++ b/src/sammo/API/Login/ReqNonce.php
@@ -15,7 +15,7 @@ use sammo\Validator;
 class ReqNonce extends BaseAPI{
 
     public function getRequiredSessionMode(): int {
-        return \sammo\BaseAPI::NO_SESSION;
+        return \sammo\BaseAPI::NO_LOGIN;
     }
 
     public function validateArgs(): ?string
diff --git a/src/sammo/APIHelper.php b/src/sammo/APIHelper.php
index 6f90af2e..c73f46d9 100644
--- a/src/sammo/APIHelper.php
+++ b/src/sammo/APIHelper.php
@@ -45,15 +45,15 @@ class APIHelper
             }
 
             $sessionMode = $obj->getRequiredSessionMode();
-            if ($sessionMode === BaseAPI::NO_SESSION) {
-                $session = Session::getInstance(); //XXX: NoSession이면 진짜 NoSession이어야..?
+            if ($sessionMode === BaseAPI::DUMMY_SESSION) {
+                $session = new DummySession();
             } else {
                 if ($sessionMode & BaseAPI::REQ_GAME_LOGIN) {
                     $session = Session::requireGameLogin();
                 } else if ($sessionMode & BaseAPI::REQ_LOGIN) {
                     $session = Session::requireLogin();
                 } else {
-                    Json::dieWithReason("올바르지 않은 SessionMode: {$sessionMode}");
+                    $session = Session::getInstance();
                 }
 
                 if ($sessionMode & BaseAPI::REQ_READ_ONLY) {
diff --git a/src/sammo/BaseAPI.php b/src/sammo/BaseAPI.php
index d4919b4d..59a7d21e 100644
--- a/src/sammo/BaseAPI.php
+++ b/src/sammo/BaseAPI.php
@@ -4,7 +4,8 @@ namespace sammo;
 
 abstract class BaseAPI
 {
-    const NO_SESSION = 0;
+    const DUMMY_SESSION = -1;
+    const NO_LOGIN = 0;
     const REQ_LOGIN = 1;
     const REQ_GAME_LOGIN = 2;
     const REQ_READ_ONLY = 4;