diff --git a/src/server.py b/src/server.py
index c50c013..4236bcb 100644
--- a/src/server.py
+++ b/src/server.py
@@ -7,7 +7,10 @@
 server = FastMCP("Wikidata MCP Server")
 
 WIKIDATA_URL = "https://www.wikidata.org/w/api.php"
-HEADER = {"Accept": "application/json", "User-Agent": "foobar"}
+HEADER = {
+    "Accept": "application/json",
+    "User-Agent": "mcp-wikidata/0.1 (https://github.com/zzaebok/mcp-wikidata)",
+}
 
 
 async def search_wikidata(query: str, is_entity: bool = True, limit: int=1) -> str:
@@ -108,7 +111,7 @@ async def execute_sparql(sparql_query: str) -> str:
     url = "https://query.wikidata.org/sparql"
     async with httpx.AsyncClient() as client:
         response = await client.get(
-            url, params={"query": sparql_query, "format": "json"}
+            url, headers=HEADER, params={"query": sparql_query, "format": "json"}
         )
     response.raise_for_status()
     result = response.json()["results"]["bindings"]
@@ -135,7 +138,7 @@ async def get_metadata(entity_id: str, language: str = "en") -> Dict[str, str]:
         "format": "json",
     }
     async with httpx.AsyncClient() as client:
-        response = await client.get(WIKIDATA_URL, params=params)
+        response = await client.get(WIKIDATA_URL, headers=HEADER, params=params)
     response.raise_for_status()
     data = response.json()
     entity_data = data.get("entities", {}).get(entity_id, {})