Create http utility

src/fastmcp/client/auth.py

@@ -25,9 +25,9 @@ from pydantic import AnyHttpUrl, ValidationError
 
 from fastmcp.client.oauth_callback import (
     create_oauth_callback_server,
-    find_available_port,
 )
 from fastmcp.settings import settings as fastmcp_global_settings
+from fastmcp.utilities.http import find_available_port
 from fastmcp.utilities.logging import get_logger
 
 __all__ = ["OAuth"]

src/fastmcp/client/oauth_callback.py

@@ -8,7 +8,6 @@ and display styled responses to users.
 from __future__ import annotations
 
 import asyncio
-import socket
 from dataclasses import dataclass
 
 from starlette.applications import Starlette
@@ -17,6 +16,7 @@ from starlette.responses import HTMLResponse
 from starlette.routing import Route
 from uvicorn import Config, Server
 
+from fastmcp.utilities.http import find_available_port
 from fastmcp.utilities.logging import get_logger
 
 logger = get_logger(__name__)
@@ -179,13 +179,6 @@ def create_callback_html(
     """
 
 
-def find_available_port() -> int:
-    """Find an available port by letting the OS assign one."""
-    with socket.socket() as s:
-        s.bind(("127.0.0.1", 0))
-        return s.getsockname()[1]
-
-
 @dataclass
 class CallbackResponse:
     code: str | None = None

src/fastmcp/server/auth/auth.py

@@ -23,6 +23,16 @@ class OAuthProvider(
         revocation_options: RevocationOptions | None = None,
         required_scopes: list[str] | None = None,
     ):
+        """
+        Initialize the OAuth provider.
+
+        Args:
+            issuer_url: The URL of the OAuth issuer.
+            service_documentation_url: The URL of the service documentation.
+            client_registration_options: The client registration options.
+            revocation_options: The revocation options.
+            required_scopes: Scopes that are required for all requests.
+        """
         super().__init__()
         if isinstance(issuer_url, str):
             issuer_url = AnyHttpUrl(issuer_url)

src/fastmcp/utilities/http.py

@@ -0,0 +1,8 @@
+import socket
+
+
+def find_available_port() -> int:
+    """Find an available port by letting the OS assign one."""
+    with socket.socket() as s:
+        s.bind(("127.0.0.1", 0))
+        return s.getsockname()[1]

tests/auth/test_oauth_client.py

@@ -11,7 +11,7 @@ import fastmcp.client.auth  # Import module, not the function directly
 from fastmcp.client import Client
 from fastmcp.client.transports import StreamableHttpTransport
 from fastmcp.server.auth.auth import ClientRegistrationOptions
-from fastmcp.server.auth.in_memory_provider import InMemoryOAuthProvider
+from fastmcp.server.auth.providers.in_memory import InMemory
 from fastmcp.server.server import FastMCP
 from fastmcp.utilities.tests import run_server_in_process
 
@@ -20,7 +20,7 @@ def fastmcp_server(issuer_url: str):
     """Create a FastMCP server with OAuth authentication."""
     server = FastMCP(
         "TestServer",
-        auth=InMemoryOAuthProvider(
+        auth=InMemory(
             issuer_url=issuer_url,
             client_registration_options=ClientRegistrationOptions(enabled=True),
         ),