Replace httpx and httpx-sse with httpx2 (#2972)

Co-authored-by: Max Isbey <224885523+maxisbey@users.noreply.github.com>

examples/clients/simple-auth-client/mcp_simple_auth_client/main.py

@@ -17,7 +17,7 @@ from http.server import BaseHTTPRequestHandler, HTTPServer
 from typing import Any
 from urllib.parse import parse_qs, urlparse
 
-import httpx
+import httpx2
 from mcp.client._transport import ReadStream, WriteStream
 from mcp.client.auth import AuthorizationCodeResult, OAuthClientProvider, TokenStorage
 from mcp.client.session import ClientSession
@@ -233,7 +233,7 @@ class SimpleAuthClient:
                     await self._run_session(read_stream, write_stream)
             else:
                 print("📡 Opening StreamableHTTP transport connection with auth...")
-                async with httpx.AsyncClient(auth=oauth_auth, follow_redirects=True) as custom_client:
+                async with httpx2.AsyncClient(auth=oauth_auth, follow_redirects=True) as custom_client:
                     async with streamable_http_client(url=self.server_url, http_client=custom_client) as (
                         read_stream,
                         write_stream,

examples/clients/simple-chatbot/mcp_simple_chatbot/main.py

@@ -8,7 +8,7 @@ import shutil
 from contextlib import AsyncExitStack
 from typing import Any
 
-import httpx
+import httpx2
 from dotenv import load_dotenv
 from mcp import ClientSession, StdioServerParameters
 from mcp.client.stdio import stdio_client
@@ -227,10 +227,7 @@ class LLMClient:
             messages: A list of message dictionaries.
 
         Returns:
-            The LLM's response as a string.
-
-        Raises:
-            httpx.RequestError: If the request to the LLM fails.
+            The LLM's response as a string, or an error message if the request fails.
         """
         url = "https://api.groq.com/openai/v1/chat/completions"
 
@@ -249,17 +246,17 @@ class LLMClient:
         }
 
         try:
-            with httpx.Client() as client:
+            with httpx2.Client() as client:
                 response = client.post(url, headers=headers, json=payload)
                 response.raise_for_status()
                 data = response.json()
                 return data["choices"][0]["message"]["content"]
 
-        except httpx.RequestError as e:
+        except httpx2.HTTPError as e:
             error_message = f"Error getting LLM response: {str(e)}"
             logging.error(error_message)
 
-            if isinstance(e, httpx.HTTPStatusError):
+            if isinstance(e, httpx2.HTTPStatusError):
                 status_code = e.response.status_code
                 logging.error(f"Status code: {status_code}")
                 logging.error(f"Response details: {e.response.text}")

examples/clients/sse-polling-client/mcp_sse_polling_client/main.py

@@ -92,8 +92,8 @@ def main(url: str, items: int, checkpoint_every: int, log_level: str) -> None:
         format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
     )
     # Suppress noisy HTTP client logging
-    logging.getLogger("httpx").setLevel(logging.WARNING)
-    logging.getLogger("httpcore").setLevel(logging.WARNING)
+    logging.getLogger("httpx2").setLevel(logging.WARNING)
+    logging.getLogger("httpcore2").setLevel(logging.WARNING)
 
     asyncio.run(run_demo(url, items, checkpoint_every))