diff --git a/.gitignore b/.gitignore
index 1a4e9b5..d282cad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,9 +1,9 @@
-__pycache__/
-.pytest_cache/
-.env
-node_modules
-build
-.svelte-kit
-package
-vite.config.js.timestamp-*
-vite.config.ts.timestamp-*
+__pycache__/
+.pytest_cache/
+.env
+node_modules
+build
+.svelte-kit
+package
+vite.config.js.timestamp-*
+vite.config.ts.timestamp-*
diff --git a/foxnouns/auth.py b/foxnouns/auth.py
deleted file mode 100644
index 83d2765..0000000
--- a/foxnouns/auth.py
+++ /dev/null
@@ -1,24 +0,0 @@
-from functools import wraps
-
-from quart import g
-
-from foxnouns.exceptions import ErrorCode, ForbiddenError
-
-
-def require_auth(*, scope: str | None = None):
-    def decorator(func):
-        @wraps(func)
-        async def wrapper(*args, **kwargs):
-            if "user" not in g or "token" not in g:
-                raise ForbiddenError("Not authenticated", type=ErrorCode.Forbidden)
-
-            if scope and not g.token.has_scope(scope):
-                raise ForbiddenError(
-                    f"Missing scope '{scope}'", type=ErrorCode.MissingScope
-                )
-
-            return await func(*args, **kwargs)
-
-        return wrapper
-
-    return decorator
diff --git a/foxnouns/blueprints/v2/auth/discord.py b/foxnouns/blueprints/v2/auth/discord.py
index 5f873b7..f641490 100644
--- a/foxnouns/blueprints/v2/auth/discord.py
+++ b/foxnouns/blueprints/v2/auth/discord.py
@@ -1,14 +1,16 @@
 from quart import Blueprint
 from quart_schema import validate_request, validate_response
 
-from foxnouns.settings import BASE_DOMAIN
+from foxnouns import settings
+from foxnouns.decorators import require_config_key
 
 from . import BaseCallbackResponse, OAuthCallbackRequest
 
 bp = Blueprint("discord_v2", __name__)
 
 
-@bp.post("/api/v2/auth/discord/callback", host=BASE_DOMAIN)
+@bp.post("/api/v2/auth/discord/callback", host=settings.BASE_DOMAIN)
+@require_config_key(keys=[settings.DISCORD_CLIENT_ID, settings.DISCORD_CLIENT_SECRET])
 @validate_request(OAuthCallbackRequest)
 @validate_response(BaseCallbackResponse)
 async def discord_callback(data: OAuthCallbackRequest):
diff --git a/foxnouns/blueprints/v2/members.py b/foxnouns/blueprints/v2/members.py
index 613fa35..b8f541b 100644
--- a/foxnouns/blueprints/v2/members.py
+++ b/foxnouns/blueprints/v2/members.py
@@ -3,7 +3,7 @@ from quart import Blueprint, g
 from quart_schema import validate_request, validate_response
 
 from foxnouns import tasks
-from foxnouns.auth import require_auth
+from foxnouns.decorators import require_auth
 from foxnouns.db import Member
 from foxnouns.db.aio import async_session
 from foxnouns.db.util import user_from_ref
diff --git a/foxnouns/blueprints/v2/users.py b/foxnouns/blueprints/v2/users.py
index 2f42cfd..9bd7042 100644
--- a/foxnouns/blueprints/v2/users.py
+++ b/foxnouns/blueprints/v2/users.py
@@ -4,7 +4,7 @@ from quart_schema import validate_request, validate_response
 from sqlalchemy import select
 
 from foxnouns import tasks
-from foxnouns.auth import require_auth
+from foxnouns.decorators import require_auth
 from foxnouns.db import User
 from foxnouns.db.aio import async_session
 from foxnouns.db.snowflake import Snowflake
diff --git a/foxnouns/decorators.py b/foxnouns/decorators.py
new file mode 100644
index 0000000..61368b6
--- /dev/null
+++ b/foxnouns/decorators.py
@@ -0,0 +1,45 @@
+from typing import Any
+from functools import wraps
+
+from quart import g
+
+from foxnouns.exceptions import ErrorCode, ForbiddenError, UnsupportedEndpointError
+
+
+def require_auth(*, scope: str | None = None):
+    """Decorator that requires a token with the given scopes.
+    If no token is given or the required scopes aren't set on it, execution is aborted."""
+
+    def decorator(func):
+        @wraps(func)
+        async def wrapper(*args, **kwargs):
+            if "user" not in g or "token" not in g:
+                raise ForbiddenError("Not authenticated", type=ErrorCode.Forbidden)
+
+            if scope and not g.token.has_scope(scope):
+                raise ForbiddenError(
+                    f"Missing scope '{scope}'", type=ErrorCode.MissingScope
+                )
+
+            return await func(*args, **kwargs)
+
+        return wrapper
+
+    return decorator
+
+
+def require_config_key(*, keys: list[Any]):
+    """Decorator that requires one or more config keys to be set.
+    If any of them are None, execution is aborted."""
+
+    def decorator(func):
+        @wraps(func)
+        async def wrapper(*args, **kwargs):
+            for key in keys:
+                if not key:
+                    raise UnsupportedEndpointError()
+            return await func(*args, **kwargs)
+
+        return wrapper
+
+    return decorator
diff --git a/foxnouns/exceptions.py b/foxnouns/exceptions.py
index 63739cc..832a3ec 100644
--- a/foxnouns/exceptions.py
+++ b/foxnouns/exceptions.py
@@ -80,3 +80,14 @@ class ForbiddenError(ExpectedError):
     def __init__(self, msg: str, type=ErrorCode.Forbidden):
         self.type = type
         super().__init__(msg, type)
+
+
+class UnsupportedEndpointError(ExpectedError):
+    status_code = 404
+
+    def __init__(self):
+        self.type = ErrorCode.NotFound
+        super().__init__(
+            "Endpoint is not supported on this instance",
+            type=ErrorCode.NotFound,
+        )
diff --git a/foxnouns/settings.py b/foxnouns/settings.py
index 480243d..b89d796 100644
--- a/foxnouns/settings.py
+++ b/foxnouns/settings.py
@@ -27,6 +27,10 @@ with env.prefixed("MINIO_"):
         "REGION": env("REGION", "auto"),
     }
 
+# Discord OAuth credentials. If these are not set the Discord OAuth endpoints will not work.
+DISCORD_CLIENT_ID = env("DISCORD_CLIENT_ID", None)
+DISCORD_CLIENT_SECRET = env("DISCORD_CLIENT_SECRET", None)
+
 # The base domain the API is served on. This must be set.
 BASE_DOMAIN = env("BASE_DOMAIN")
 # The base domain for short URLs.