diff --git a/src/engram/_base_client.py b/src/engram/_base_client.py
index 93cad73..59c7233 100644
--- a/src/engram/_base_client.py
+++ b/src/engram/_base_client.py
@@ -25,7 +25,7 @@ def __init__(
             raise ValidationError("Timeout must be greater than 0.")
 
         normalized_base_url = base_url.rstrip("/")
-        default_headers = _build_headers(api_key=api_key, header_overrides=headers or {})
+        default_headers = _build_headers(api_key=api_key, extra_headers=headers or {})
 
         self._config = ClientConfig(
             base_url=normalized_base_url,
@@ -43,16 +43,24 @@ def default_headers(self) -> dict[str, str]:
         return dict(self._config.headers)
 
 
+CLIENT_ORIGIN_HEADER = "X-Engram-Client"
+SDK_CLIENT_TOKEN = f"python-sdk/{__version__}"
+
+
 def _build_headers(
     *,
     api_key: str,
-    header_overrides: Mapping[str, str],
+    extra_headers: Mapping[str, str],
 ) -> dict[str, str]:
-    headers: dict[str, str] = {
-        "Accept": "application/json",
-        "Content-Type": "application/json",
-        "User-Agent": f"weaviate-engram/{__version__}",
-        "Authorization": f"Bearer {api_key}",
-    }
-    headers.update(header_overrides)
+    headers = dict(extra_headers)
+    headers.update(
+        {
+            "Accept": "application/json",
+            "Content-Type": "application/json",
+            "Authorization": f"Bearer {api_key}",
+        }
+    )
+
+    caller = extra_headers.get(CLIENT_ORIGIN_HEADER)
+    headers[CLIENT_ORIGIN_HEADER] = f"{caller} {SDK_CLIENT_TOKEN}" if caller else SDK_CLIENT_TOKEN
     return headers
diff --git a/tests/test_client_async.py b/tests/test_client_async.py
index c6ca3c0..faf9889 100644
--- a/tests/test_client_async.py
+++ b/tests/test_client_async.py
@@ -18,6 +18,7 @@
 )
 from engram.async_client import DEFAULT_BASE_URL, AsyncEngramClient
 from engram.errors import APIError, AuthenticationError, ValidationError
+from engram.version import __version__
 
 
 @pytest.mark.asyncio
@@ -29,6 +30,7 @@ async def test_async_client_defaults() -> None:
         assert client.default_headers["Accept"] == "application/json"
         assert client.default_headers["Content-Type"] == "application/json"
         assert client.default_headers["Authorization"] == "Bearer test-key"
+        assert client.default_headers["X-Engram-Client"] == f"python-sdk/{__version__}"
     finally:
         await client.aclose()
 
diff --git a/tests/test_client_sync.py b/tests/test_client_sync.py
index 94948e0..f71b327 100644
--- a/tests/test_client_sync.py
+++ b/tests/test_client_sync.py
@@ -18,6 +18,7 @@
 )
 from engram.client import DEFAULT_BASE_URL, EngramClient
 from engram.errors import APIError, AuthenticationError, ValidationError
+from engram.version import __version__
 
 
 def test_client_defaults() -> None:
@@ -28,6 +29,21 @@ def test_client_defaults() -> None:
         assert client.default_headers["Accept"] == "application/json"
         assert client.default_headers["Content-Type"] == "application/json"
         assert client.default_headers["Authorization"] == "Bearer test-key"
+        assert client.default_headers["X-Engram-Client"] == f"python-sdk/{__version__}"
+    finally:
+        client.close()
+
+
+def test_client_origin_header_composition() -> None:
+    client = EngramClient(
+        api_key="test-key",
+        headers={"X-Engram-Client": "example-integration/1.2.3"},
+    )
+    try:
+        assert (
+            client.default_headers["X-Engram-Client"]
+            == f"example-integration/1.2.3 python-sdk/{__version__}"
+        )
     finally:
         client.close()