diff --git a/src/pardner/__init__.py b/src/pardner/__init__.py
index 149291f..fa2db8d 100644
--- a/src/pardner/__init__.py
+++ b/src/pardner/__init__.py
@@ -1,2 +1,3 @@
+from pardner import exceptions as exceptions
 from pardner import services as services
 from pardner import verticals as verticals
diff --git a/src/pardner/exceptions.py b/src/pardner/exceptions.py
new file mode 100644
index 0000000..09be30c
--- /dev/null
+++ b/src/pardner/exceptions.py
@@ -0,0 +1,24 @@
+from pardner.verticals import Vertical
+
+
+class InsufficientScopeException(Exception):
+    def __init__(self, *unsupported_verticals: Vertical, service_name: str) -> None:
+        combined_verticals = ', '.join(unsupported_verticals)
+        super().__init__(
+            f'Cannot add {combined_verticals} to {service_name} with current scope.'
+        )
+
+
+class UnsupportedVerticalException(Exception):
+    def __init__(self, *unsupported_verticals: Vertical, service_name: str) -> None:
+        combined_verticals = ', '.join(unsupported_verticals)
+        is_more_than_one_vertical = len(unsupported_verticals) > 1
+        super().__init__(
+            f'Cannot fetch {combined_verticals} from {service_name} because '
+            f'{"they are" if is_more_than_one_vertical else "it is"} not supported.'
+        )
+
+
+class UnsupportedRequestException(Exception):
+    def __init__(self, service_name: str, message: str):
+        super().__init__(f'Cannot fetch data from {service_name}: {message}')
diff --git a/src/pardner/services/base.py b/src/pardner/services/base.py
index eee69f1..90c4598 100644
--- a/src/pardner/services/base.py
+++ b/src/pardner/services/base.py
@@ -5,35 +5,11 @@
 from requests import Response
 from requests_oauthlib import OAuth2Session
 
+from pardner.exceptions import InsufficientScopeException, UnsupportedVerticalException
 from pardner.services.utils import scope_as_set, scope_as_string
 from pardner.verticals import Vertical
 
 
-class InsufficientScopeException(Exception):
-    def __init__(
-        self, unsupported_verticals: Iterable[Vertical], service_name: str
-    ) -> None:
-        combined_verticals = ' '.join(unsupported_verticals)
-        super().__init__(
-            f'Cannot add {combined_verticals} to {service_name} with current scope.'
-        )
-
-
-class UnsupportedVerticalException(Exception):
-    def __init__(
-        self, unsupported_verticals: Iterable[Vertical], service_name: str
-    ) -> None:
-        combined_verticals = ' '.join(unsupported_verticals)
-        super().__init__(
-            f'Cannot add {combined_verticals} to {service_name} because they are not supported.'
-        )
-
-
-class UnsupportedRequestException(Exception):
-    def __init__(self, service_name: str, message: str):
-        super().__init__(f'Cannot fetch data from {service_name}: {message}')
-
-
 class BaseTransferService(ABC):
     """
     A base class to be extended by service-specific classes that implement logic for
@@ -118,10 +94,12 @@ def verticals(self, verticals: Iterable[Vertical]) -> None:
         unsupported_verticals = [
             vertical
             for vertical in verticals
-            if vertical not in self._supported_verticals
+            if not self.is_vertical_supported(vertical)
         ]
         if len(unsupported_verticals) > 0:
-            raise UnsupportedVerticalException(unsupported_verticals, self.name)
+            raise UnsupportedVerticalException(
+                *unsupported_verticals, service_name=self.name
+            )
         self._verticals = set(verticals)
 
     def _get_resource(self, uri: str, params: dict[str, Any] = {}) -> Response:
@@ -192,7 +170,7 @@ def add_verticals(
         new_scopes = self.scope_for_verticals(new_verticals)
 
         if not new_scopes.issubset(self.scope) and not should_reauth:
-            raise InsufficientScopeException(verticals, self.name)
+            raise InsufficientScopeException(*verticals, service_name=self.name)
         elif not new_scopes.issubset(self.scope):
             self.verticals = new_verticals | self.verticals
             del self._oAuth2Session.access_token
@@ -202,6 +180,16 @@ def add_verticals(
         self.verticals = new_verticals | self.verticals
         return True
 
+    def is_vertical_supported(self, vertical: Vertical) -> bool:
+        """
+        Utility for indicating whether ``vertical`` is supported by the service or not.
+
+        :param vertical: the ``vertical`` from which validity is checked.
+
+        :returns: ``True`` if supported, ``False`` otherwise.
+        """
+        return vertical in self._supported_verticals
+
     def fetch_token(
         self,
         code: Optional[str] = None,
@@ -252,3 +240,28 @@ def scope_for_verticals(self, verticals: Iterable[Vertical]) -> set[str]:
         :returns: Scope names corresponding to `verticals`.
         """
         pass
+
+    def fetch(
+        self, vertical: Vertical, request_params: dict[str, Any] = {}, **params: Any
+    ) -> Any:
+        """
+        Generic method for fetching data of a specific vertical.
+
+        :param vertical: the :class:`Vertical` to fetch from the
+        service.
+        :param request_params: additional request parameters to be sent with the HTTP
+        request. Requires familiarity with the API of the service being used.
+        :param params: optional keyword arguments to be passed to the methods for
+        fetching ``vertical``.
+
+        :returns: the JSON response resulting from making the request.
+
+        :raises: :class:`UnsupportedVerticalException` if the vertical is not supported.
+        """
+        if not self.is_vertical_supported(vertical):
+            raise UnsupportedVerticalException(
+                vertical, service_name=self._service_name
+            )
+
+        method_name = f'fetch_{vertical.plural}'
+        getattr(self, method_name)(request_params=request_params, **params)
diff --git a/src/pardner/services/groupme.py b/src/pardner/services/groupme.py
index 114fec5..4c59667 100644
--- a/src/pardner/services/groupme.py
+++ b/src/pardner/services/groupme.py
@@ -6,7 +6,8 @@
 from requests import Response
 from requests_oauthlib import OAuth2Session
 
-from pardner.services.base import BaseTransferService, UnsupportedRequestException
+from pardner.exceptions import UnsupportedRequestException
+from pardner.services import BaseTransferService
 from pardner.verticals import Vertical
 
 
@@ -113,24 +114,28 @@ def scope_for_verticals(self, verticals: Iterable[Vertical]) -> set[str]:
         # GroupMe does not require scope
         return set()
 
-    def fetch_user_data(self) -> Any:
+    def fetch_user_data(self, request_params: dict[str, Any] = {}) -> Any:
         """
         Fetches user identifiers and profile data. Also sets ``self._user_id``, which
         is necessary for most requests.
 
         :returns: user identifiers and profile data in dictionary format.
         """
-        user_data = self._get_resource_from_path('users/me').json().get('response')
+        user_data = (
+            self._get_resource_from_path('users/me', request_params)
+            .json()
+            .get('response')
+        )
         self._user_id = user_data['id']
         return user_data
 
-    def fetch_blocked_users(self) -> Any:
+    def fetch_blocked_users(self, request_params: dict[str, Any] = {}) -> Any:
         """
         Sends a GET request to fetch the users blocked by the authenticated user.
 
         :returns: a JSON object with the result of the request.
         """
-        blocked_users = self._fetch_resource_common('blocks')
+        blocked_users = self._fetch_resource_common('blocks', request_params)
 
         if 'blocks' not in blocked_users:
             raise ValueError(
@@ -139,15 +144,17 @@ def fetch_blocked_users(self) -> Any:
 
         return blocked_users['blocks']
 
-    def fetch_chat_bots(self) -> Any:
+    def fetch_chat_bots(self, request_params: dict[str, Any] = {}) -> Any:
         """
         Sends a GET request to fetch the chat bots created by the authenticated user.
 
         :returns: a JSON object with the result of the request.
         """
-        return self._fetch_resource_common('bots')
+        return self._fetch_resource_common('bots', request_params)
 
-    def fetch_conversations_direct(self, count: int = 10) -> Any:
+    def fetch_conversations_direct(
+        self, request_params: dict[str, Any] = {}, count: int = 10
+    ) -> Any:
         """
         Sends a GET request to fetch the conversations the authenticated user is a part
         of with only one other member (i.e., a direct message). The response will
@@ -159,13 +166,17 @@ def fetch_conversations_direct(self, count: int = 10) -> Any:
         :returns: a JSON object with the result of the request.
         """
         if count <= 10:
-            return self._fetch_resource_common('chats', params={'per_page': count})
+            return self._fetch_resource_common(
+                'chats', params={**request_params, 'per_page': count}
+            )
         raise UnsupportedRequestException(
             self._service_name,
             'can only make a request for at most 10 direct conversations at a time.',
         )
 
-    def fetch_conversations_group(self, count: int = 10) -> Any:
+    def fetch_conversations_group(
+        self, request_params: dict[str, Any] = {}, count: int = 10
+    ) -> Any:
         """
         Sends a GET request to fetch the group conversations the authenticated user is
         a part of. The response will include metadata associated with the conversation,
@@ -176,7 +187,9 @@ def fetch_conversations_group(self, count: int = 10) -> Any:
         :returns: a JSON object with the result of the request.
         """
         if count <= 10:
-            return self._fetch_resource_common('groups', params={'per_page': count})
+            return self._fetch_resource_common(
+                'groups', params={**request_params, 'per_page': count}
+            )
         raise UnsupportedRequestException(
             self._service_name,
             'can only make a request for at most 10 group conversations at a time.',
diff --git a/src/pardner/services/strava.py b/src/pardner/services/strava.py
index 46a07d1..ea3a6c0 100644
--- a/src/pardner/services/strava.py
+++ b/src/pardner/services/strava.py
@@ -1,10 +1,7 @@
 from typing import Any, Iterable, Optional, override
 
-from pardner.services.base import (
-    BaseTransferService,
-    UnsupportedRequestException,
-    UnsupportedVerticalException,
-)
+from pardner.exceptions import UnsupportedRequestException, UnsupportedVerticalException
+from pardner.services import BaseTransferService
 from pardner.services.utils import scope_as_set, scope_as_string
 from pardner.verticals import Vertical
 
@@ -59,14 +56,16 @@ def fetch_token(
     def scope_for_verticals(self, verticals: Iterable[Vertical]) -> set[str]:
         sub_scopes: set[str] = set()
         for vertical in verticals:
-            if vertical not in self._supported_verticals:
-                raise UnsupportedVerticalException([vertical], self._service_name)
+            if not self.is_vertical_supported(vertical):
+                raise UnsupportedVerticalException(
+                    vertical, service_name=self._service_name
+                )
             if vertical == Vertical.PhysicalActivity:
                 sub_scopes.update(['activity:read', 'profile:read_all'])
         return sub_scopes
 
-    def fetch_athlete_activities(
-        self, count: int = 30, request_params: dict[str, Any] = {}
+    def fetch_physical_activities(
+        self, request_params: dict[str, Any] = {}, count: int = 30
     ) -> list[Any]:
         """
         Fetches and returns activities completed by the authorized user.
diff --git a/src/pardner/services/tumblr.py b/src/pardner/services/tumblr.py
index af4f523..856f1b4 100644
--- a/src/pardner/services/tumblr.py
+++ b/src/pardner/services/tumblr.py
@@ -1,7 +1,7 @@
 from typing import Any, Iterable, Optional, override
 
+from pardner.exceptions import UnsupportedRequestException
 from pardner.services import BaseTransferService
-from pardner.services.base import UnsupportedRequestException
 from pardner.verticals import Vertical
 
 
@@ -50,9 +50,9 @@ def fetch_token(
 
     def fetch_feed_posts(
         self,
+        request_params: dict[str, Any] = {},
         count: int = 20,
         text_only: bool = True,
-        request_params: dict[str, Any] = {},
     ) -> list[Any]:
         """
         Fetches posts from Tumblr feed for user account whose token was
diff --git a/src/pardner/verticals/base.py b/src/pardner/verticals/base.py
index 4cef5b4..89b2fd3 100644
--- a/src/pardner/verticals/base.py
+++ b/src/pardner/verticals/base.py
@@ -1,16 +1,25 @@
 from enum import StrEnum
+from typing import Optional
 
 
 class Vertical(StrEnum):
     """
-    Represents the verticals, or categories of data, that are supported by `pardner`.
+    Represents the verticals, or categories of data, that are supported by this library.
     Not all verticals are supported by every transfer service.
     """
 
     BlockedUser = 'blocked_user'
     ChatBot = 'chat_bot'
-    ConversationDirect = 'conversation_direct'
-    ConversationGroup = 'conversation_group'
+    ConversationDirect = 'conversation_direct', 'conversations_direct'
+    ConversationGroup = 'conversation_group', 'conversations_group'
     ConversationMessage = 'conversation_message'
     FeedPost = 'feed_post'
-    PhysicalActivity = 'physical_activity'
+    PhysicalActivity = 'physical_activity', 'physical_activities'
+
+    plural: str
+
+    def __new__(cls, singular: str, plural: Optional[str] = None) -> 'Vertical':
+        vertical_obj = str.__new__(cls, singular)
+        vertical_obj._value_ = singular
+        vertical_obj.plural = plural if plural else f'{singular}s'
+        return vertical_obj
diff --git a/tests/test_transfer_services/conftest.py b/tests/test_transfer_services/conftest.py
index 4ac42d7..fbe78cc 100644
--- a/tests/test_transfer_services/conftest.py
+++ b/tests/test_transfer_services/conftest.py
@@ -12,6 +12,18 @@
 # FIXTURES
 
 
+@pytest.fixture
+def mock_nested_dict(mocker):
+    def nested_dict():
+        mock_dict = mocker.MagicMock(spec=dict, name='mock_nested_dict')
+        mock_dict.__getitem__.side_effect = lambda _: nested_dict()
+        mock_dict.get.side_effect = lambda _, default=None: nested_dict()
+        mock_dict.__contains__.side_effect = lambda _: True
+        return mock_dict
+
+    return nested_dict()
+
+
 @pytest.fixture
 def mock_oauth2_session_request(mocker):
     return mocker.patch('requests_oauthlib.OAuth2Session.request')
@@ -76,6 +88,23 @@ def mock_oauth2_session_get_bad_response(mocker, mock_oauth2_bad_response):
     return oauth2_session_get
 
 
+@pytest.fixture
+def mock_oauth2_good_response(mocker, mock_nested_dict):
+    mock_response = mocker.create_autospec(Response)
+    mock_response.ok = True
+    mock_response.status_code = 200
+    mock_response.url = 'fake url'
+    mock_response.json.return_value = mock_nested_dict
+    return mock_response
+
+
+@pytest.fixture
+def mock_oauth2_session_get_good_response(mocker, mock_oauth2_good_response):
+    oauth2_session_get = mocker.patch.object(OAuth2Session, 'get', autospec=True)
+    oauth2_session_get.return_value = mock_oauth2_good_response
+    return oauth2_session_get
+
+
 # HELPERS
 
 
diff --git a/tests/test_transfer_services/test_groupme.py b/tests/test_transfer_services/test_groupme.py
index bd6be83..f2e27c6 100644
--- a/tests/test_transfer_services/test_groupme.py
+++ b/tests/test_transfer_services/test_groupme.py
@@ -1,6 +1,6 @@
 import pytest
 
-from pardner.services.base import UnsupportedRequestException
+from pardner.exceptions import UnsupportedRequestException
 from tests.test_transfer_services.conftest import mock_oauth2_session_get
 
 USER_ID = 'fake_user_id'
diff --git a/tests/test_transfer_services/test_strava.py b/tests/test_transfer_services/test_strava.py
index 5a3944c..659e4e2 100644
--- a/tests/test_transfer_services/test_strava.py
+++ b/tests/test_transfer_services/test_strava.py
@@ -1,10 +1,7 @@
 import pytest
 from requests import HTTPError
 
-from pardner.services.base import (
-    UnsupportedRequestException,
-    UnsupportedVerticalException,
-)
+from pardner.exceptions import UnsupportedRequestException, UnsupportedVerticalException
 from pardner.verticals import Vertical
 from tests.test_transfer_services.conftest import mock_oauth2_session_get
 
@@ -26,19 +23,19 @@ def test_scope_for_verticals_raises_error(mock_strava_transfer_service, mock_ver
         mock_strava_transfer_service.scope_for_verticals([Vertical.NEW_VERTICAL])
 
 
-def test_fetch_athlete_activities_raises_exception(mock_strava_transfer_service):
+def test_fetch_physical_activities_raises_exception(mock_strava_transfer_service):
     with pytest.raises(UnsupportedRequestException):
-        mock_strava_transfer_service.fetch_athlete_activities(count=31)
+        mock_strava_transfer_service.fetch_physical_activities(count=31)
 
 
-def test_fetch_athlete_activities_raises_http_exception(
+def test_fetch_physical_activities_raises_http_exception(
     mock_strava_transfer_service, mock_oauth2_session_get_bad_response
 ):
     with pytest.raises(HTTPError):
-        mock_strava_transfer_service.fetch_athlete_activities()
+        mock_strava_transfer_service.fetch_physical_activities()
 
 
-def test_fetch_athlete_activities(mocker, mock_strava_transfer_service):
+def test_fetch_physical_activities(mocker, mock_strava_transfer_service):
     sample_response = [{'object': 1}, {'object': 2}]
 
     response_object = mocker.MagicMock()
@@ -46,7 +43,7 @@ def test_fetch_athlete_activities(mocker, mock_strava_transfer_service):
 
     oauth2_session_get = mock_oauth2_session_get(mocker, response_object)
 
-    assert mock_strava_transfer_service.fetch_athlete_activities() == sample_response
+    assert mock_strava_transfer_service.fetch_physical_activities() == sample_response
     assert (
         oauth2_session_get.call_args.args[1]
         == 'https://www.strava.com/api/v3/athlete/activities'
diff --git a/tests/test_transfer_services/test_transfer_services_common.py b/tests/test_transfer_services/test_transfer_services_common.py
index 0d1cd06..64eb519 100644
--- a/tests/test_transfer_services/test_transfer_services_common.py
+++ b/tests/test_transfer_services/test_transfer_services_common.py
@@ -1,5 +1,8 @@
 import pytest
 
+from pardner.exceptions import UnsupportedVerticalException
+from pardner.verticals import Vertical
+
 
 @pytest.mark.parametrize(
     'mock_transfer_service_name',
@@ -19,3 +22,23 @@ def test_fetch_token(
         mock_oauth2_session_request.call_args.kwargs['data']['client_id']
         == 'fake_client_id'
     )
+
+
+@pytest.mark.parametrize(
+    'mock_transfer_service_name',
+    [
+        'mock_tumblr_transfer_service',
+        'mock_strava_transfer_service',
+        'mock_groupme_transfer_service',
+    ],
+)
+def test_fetch_vertical_generic(
+    request, mock_oauth2_session_get_good_response, mock_transfer_service_name
+):
+    mock_transfer_service = request.getfixturevalue(mock_transfer_service_name)
+    for vertical in Vertical:
+        if not mock_transfer_service.is_vertical_supported(vertical):
+            with pytest.raises(UnsupportedVerticalException):
+                mock_transfer_service.fetch(vertical)
+        else:
+            mock_transfer_service.fetch(vertical)
diff --git a/tests/test_transfer_services/test_tumblr.py b/tests/test_transfer_services/test_tumblr.py
index 2ce6d80..77688d7 100644
--- a/tests/test_transfer_services/test_tumblr.py
+++ b/tests/test_transfer_services/test_tumblr.py
@@ -1,7 +1,7 @@
 import pytest
 from requests import HTTPError
 
-from pardner.services.base import UnsupportedRequestException
+from pardner.exceptions import UnsupportedRequestException
 from pardner.verticals import Vertical
 from tests.test_transfer_services.conftest import mock_oauth2_session_get