diff --git a/src/rime_api.cc b/src/rime_api.cc
index 9740e88c2..e8e61f7d6 100644
--- a/src/rime_api.cc
+++ b/src/rime_api.cc
@@ -719,6 +719,24 @@ RIME_API Bool RimeConfigBeginList(RimeConfigIterator* iterator,
   iterator->list = new RimeConfigIteratorImpl<ConfigList>(*list, key);
   return True;
 }
+RIME_API Bool RimeConfigListAppendString(RimeConfig* config, const char* key, const char* value) {
+  if (!config) {
+    return False;
+  }
+  Config* c = reinterpret_cast<Config*>(config->ptr);
+  if (!c) {
+    return False;
+  }
+  an<ConfigList> list = c->GetList(key);
+  if (!list) {
+    return False;
+  }
+  auto val = New<ConfigValue>();
+  val->SetString(value);
+  if(!list->Append(val))
+    return False;
+  return True;
+}
 
 RIME_API Bool RimeConfigBeginMap(RimeConfigIterator* iterator,
                                  RimeConfig* config,
@@ -1172,6 +1190,7 @@ RIME_API RimeApi* rime_get_api() {
     s_api.config_create_map = &RimeConfigCreateMap;
     s_api.config_list_size = &RimeConfigListSize;
     s_api.config_begin_list = &RimeConfigBeginList;
+    s_api.config_list_append_string = &RimeConfigListAppendString;
     s_api.get_input = &RimeGetInput;
     s_api.get_caret_pos = &RimeGetCaretPos;
     s_api.select_candidate = &RimeSelectCandidate;
diff --git a/src/rime_api.h b/src/rime_api.h
index 1d6c6a7bc..157c7168a 100644
--- a/src/rime_api.h
+++ b/src/rime_api.h
@@ -291,6 +291,9 @@ RIME_API Bool RimeFreeStatus(RimeStatus* status);
 // Accessing candidate list
 RIME_API Bool RimeCandidateListBegin(RimeSessionId session_id,
                                      RimeCandidateListIterator* iterator);
+RIME_API Bool RimeConfigListAppendString(RimeConfig* config,
+                                         const char* key,
+                                         const char* value); 
 RIME_API Bool RimeCandidateListNext(RimeCandidateListIterator* iterator);
 RIME_API void RimeCandidateListEnd(RimeCandidateListIterator* iterator);
 RIME_API Bool RimeCandidateListFromIndex(RimeSessionId session_id,
@@ -578,7 +581,9 @@ typedef struct rime_api_t {
   Bool (*config_begin_list)(RimeConfigIterator* iterator,
                             RimeConfig* config,
                             const char* key);
-
+  Bool (*config_list_append_string)(RimeConfig* config,
+                                    const char* key,
+                                    const char* value);
   //! get raw input
   /*!
    *  NULL is returned if session does not exist.