diff --git a/CHANGELOG.md b/CHANGELOG.md
index 11bc25b..9e1fe3a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 3.6.3
+
+### Changed
+
+- Use `socket-sdk-python/<version>` as the default User-Agent. Explicit caller
+  overrides continue to identify the calling application.
+
 ## 3.6.2
 
 ### Fixed: reject retired API credentials before use
diff --git a/README.rst b/README.rst
index 0ac5262..c4c77a0 100644
--- a/README.rst
+++ b/README.rst
@@ -27,7 +27,7 @@ Initializing the module
 - **token (str)** - The Socket API Key for your Organization
 - **timeout (int)** - The number of seconds to wait before failing the connection
 - **allow_unverified (bool)** - Whether to skip SSL certificate verification (default: False). Set to True for testing with self-signed certificates.
-- **user_agent (str, optional)** - Custom User-Agent string to use in API requests. If not provided, defaults to "SocketSDKPython/{version}"
+- **user_agent (str, optional)** - Custom User-Agent string to use in API requests. If not provided, defaults to "socket-sdk-python/{version}". Applications such as the Socket CLI can override this with their own product name and version.
 
 Supported Functions
 -------------------
diff --git a/socketdev/core/api.py b/socketdev/core/api.py
index 73692f9..07bd61d 100644
--- a/socketdev/core/api.py
+++ b/socketdev/core/api.py
@@ -17,7 +17,7 @@
     APIInsufficientPermissions,
     APIOrganizationNotAllowed,
 )
-from socketdev.version import __version__
+from socketdev.user_agent import USER_AGENT
 from requests.exceptions import Timeout, ConnectionError
 import time
 
@@ -57,7 +57,7 @@ def do_request(
             raise APIKeyMissing
 
         if headers is None:
-            user_agent_string = self.user_agent if self.user_agent is not None else f"SocketSDKPython/{__version__}"
+            user_agent_string = self.user_agent if self.user_agent is not None else USER_AGENT
             headers = {
                 "Authorization": f"Basic {self.encoded_key}",
                 "User-Agent": user_agent_string,
diff --git a/socketdev/user_agent.py b/socketdev/user_agent.py
new file mode 100644
index 0000000..3328ecc
--- /dev/null
+++ b/socketdev/user_agent.py
@@ -0,0 +1,4 @@
+from socketdev.version import __version__
+
+USER_AGENT_NAME = "socket-sdk-python"
+USER_AGENT = f"{USER_AGENT_NAME}/{__version__}"
diff --git a/socketdev/version.py b/socketdev/version.py
index 4f82193..6a45bf5 100644
--- a/socketdev/version.py
+++ b/socketdev/version.py
@@ -1 +1 @@
-__version__ = "3.6.2"
+__version__ = "3.6.3"
diff --git a/tests/unit/test_user_agent.py b/tests/unit/test_user_agent.py
new file mode 100644
index 0000000..7dd3632
--- /dev/null
+++ b/tests/unit/test_user_agent.py
@@ -0,0 +1,66 @@
+import pytest
+import requests
+
+from socketdev import socketdev
+from socketdev.version import __version__
+
+
+@pytest.mark.parametrize("method", ["GET", "POST"])
+@pytest.mark.parametrize(
+    "user_agent",
+    [
+        None,
+        "SocketPythonCLI/2.11.7",
+        "socket-python-cli/2.11.7",
+        "socket-basics/3.4.1",
+        "custom-client/1.0.0",
+        "",
+    ],
+)
+def test_prepared_requests_use_sdk_identity_or_explicit_caller(
+    monkeypatch, method, user_agent
+):
+    captured = []
+
+    def send(session, request, **kwargs):
+        captured.append(request)
+        response = requests.Response()
+        response.status_code = 200
+        response._content = b"{}"
+        return response
+
+    monkeypatch.setattr(requests.sessions.Session, "send", send)
+    sdk = socketdev(token="synthetic-test-token", user_agent=user_agent)
+    files = [("manifest", ("package.json", b"{}"))] if method == "POST" else None
+
+    sdk.api.do_request("organizations", method=method, files=files)
+
+    assert len(captured) == 1
+    expected = user_agent if user_agent is not None else f"socket-sdk-python/{__version__}"
+    assert captured[0].headers["User-Agent"] == expected
+    assert captured[0].headers["Authorization"].startswith("Basic ")
+    if files:
+        assert captured[0].headers["Content-Type"].startswith("multipart/form-data;")
+
+
+def test_endpoint_wrappers_share_the_sdk_identity(monkeypatch):
+    captured = []
+
+    def send(session, request, **kwargs):
+        captured.append(request)
+        response = requests.Response()
+        response.status_code = 200
+        response._content = b"{}"
+        return response
+
+    monkeypatch.setattr(requests.sessions.Session, "send", send)
+    sdk = socketdev(token="synthetic-test-token")
+
+    sdk.org.get()
+    sdk.basics.get_config("test-org")
+
+    assert len(captured) == 2
+    assert all(
+        request.headers["User-Agent"] == f"socket-sdk-python/{__version__}"
+        for request in captured
+    )