diff --git a/agent/component/iteration.py b/agent/component/iteration.py
index cff09d622..ae5c0b677 100644
--- a/agent/component/iteration.py
+++ b/agent/component/iteration.py
@@ -32,7 +32,7 @@ class IterationParam(ComponentParamBase):
     def __init__(self):
         super().__init__()
         self.items_ref = ""
-        self.veriable={}
+        self.variable={}
 
     def get_input_form(self) -> dict[str, dict]:
         return {
diff --git a/api/apps/__init__.py b/api/apps/__init__.py
index a53f67c06..a6e33c13b 100644
--- a/api/apps/__init__.py
+++ b/api/apps/__init__.py
@@ -24,7 +24,7 @@ from flasgger import Swagger
 from itsdangerous.url_safe import URLSafeTimedSerializer as Serializer
 from quart_cors import cors
 from common.constants import StatusEnum
-from api.db.db_models import close_connection
+from api.db.db_models import close_connection, APIToken
 from api.db.services import UserService
 from api.utils.json_encode import CustomJSONEncoder
 from api.utils import commands
@@ -124,6 +124,10 @@ def _load_user():
         user = UserService.query(
             access_token=access_token, status=StatusEnum.VALID.value
         )
+        if not user and len(authorization.split()) == 2:
+            objs = APIToken.query(token=authorization.split()[1])
+            if objs:
+                user = UserService.query(id=objs[0].tenant_id, status=StatusEnum.VALID.value)
         if user:
             if not user[0].access_token or not user[0].access_token.strip():
                 logging.warning(f"User {user[0].email} has empty access_token in database")
diff --git a/api/apps/sdk/doc.py b/api/apps/sdk/doc.py
index 30fbd835e..52acebc43 100644
--- a/api/apps/sdk/doc.py
+++ b/api/apps/sdk/doc.py
@@ -1434,6 +1434,7 @@ async def retrieval_test(tenant_id):
     question = req["question"]
     doc_ids = req.get("document_ids", [])
     use_kg = req.get("use_kg", False)
+    toc_enhance = req.get("toc_enhance", False)
     langs = req.get("cross_languages", [])
     if not isinstance(doc_ids, list):
         return get_error_data_result("`documents` should be a list")
@@ -1487,6 +1488,11 @@ async def retrieval_test(tenant_id):
             highlight=highlight,
             rank_feature=label_question(question, kbs),
         )
+        if toc_enhance:
+            chat_mdl = LLMBundle(kb.tenant_id, LLMType.CHAT)
+            cks = settings.retriever.retrieval_by_toc(question, ranks["chunks"], tenant_ids, chat_mdl, size)
+            if cks:
+                ranks["chunks"] = cks
         if use_kg:
             ck = settings.kg_retriever.retrieval(question, [k.tenant_id for k in kbs], kb_ids, embd_mdl, LLMBundle(kb.tenant_id, LLMType.CHAT))
             if ck["content_with_weight"]:
diff --git a/docs/references/http_api_reference.md b/docs/references/http_api_reference.md
index bc1b15670..253745432 100644
--- a/docs/references/http_api_reference.md
+++ b/docs/references/http_api_reference.md
@@ -2072,6 +2072,7 @@ Retrieves chunks from specified datasets.
   - `"cross_languages"`: `list[string]`
   - `"metadata_condition"`: `object`
   - `"use_kg"`: `boolean`
+  - `"toc_enhance"`: `boolean`
 ##### Request example
 
 ```bash
@@ -2122,6 +2123,8 @@ curl --request POST \
   The number of chunks engaged in vector cosine computation. Defaults to `1024`.
 - `"use_kg"`: (*Body parameter*), `boolean`  
   The search includes text chunks related to the knowledge graph of the selected dataset to handle complex multi-hop queries. Defaults to `False`.
+- `"toc_enhance"`: (*Body parameter*), `boolean`  
+  The search includes table of content enhancement in order to boost rank of relevant chunks. Files parsed with `TOC Enhance` enabled is prerequisite. Defaults to `False`.
 - `"rerank_id"`: (*Body parameter*), `integer`  
   The ID of the rerank model.
 - `"keyword"`: (*Body parameter*), `boolean`  
@@ -2136,6 +2139,9 @@ curl --request POST \
   The languages that should be translated into, in order to achieve keywords retrievals in different languages.
 - `"metadata_condition"`: (*Body parameter*), `object`  
   The metadata condition used for filtering chunks:  
+  - `"logic"`: (*Body parameter*), `string`
+    - `"and"` Intersection of the result from each condition (default).
+    - `"or"` union of the result from each condition.
   - `"conditions"`: (*Body parameter*), `array`  
     A list of metadata filter conditions.  
     - `"name"`: `string` - The metadata field name to filter by, e.g., `"author"`, `"company"`, `"url"`. Ensure this parameter before use. See [Set metadata](../guides/dataset/set_metadata.md) for details.