Rename streamablehttp_client to streamable_http_client

Author: Kludex

README.md

@@ -2241,12 +2241,12 @@ Run from the repository root:
 import asyncio
 
 from mcp import ClientSession
-from mcp.client.streamable_http import streamablehttp_client
+from mcp.client.streamable_http import streamable_http_client
 
 
 async def main():
     # Connect to a streamable HTTP server
-    async with streamablehttp_client("http://localhost:8000/mcp") as (
+    async with streamable_http_client("http://localhost:8000/mcp") as (
         read_stream,
         write_stream,
         _,
@@ -2374,7 +2374,7 @@ from pydantic import AnyUrl
 
 from mcp import ClientSession
 from mcp.client.auth import OAuthClientProvider, TokenStorage
-from mcp.client.streamable_http import streamablehttp_client
+from mcp.client.streamable_http import streamable_http_client
 from mcp.shared.auth import OAuthClientInformationFull, OAuthClientMetadata, OAuthToken
 
 
@@ -2428,7 +2428,7 @@ async def main():
         callback_handler=handle_callback,
     )
 
-    async with streamablehttp_client("http://localhost:8001/mcp", auth=oauth_auth) as (read, write, _):
+    async with streamable_http_client("http://localhost:8001/mcp", auth=oauth_auth) as (read, write, _):
         async with ClientSession(read, write) as session:
             await session.initialize()
 

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

@@ -19,7 +19,7 @@
 from mcp.client.auth import OAuthClientProvider, TokenStorage
 from mcp.client.session import ClientSession
 from mcp.client.sse import sse_client
-from mcp.client.streamable_http import streamablehttp_client
+from mcp.client.streamable_http import streamable_http_client
 from mcp.shared.auth import OAuthClientInformationFull, OAuthClientMetadata, OAuthToken
 
 
@@ -212,7 +212,7 @@ async def _default_redirect_handler(authorization_url: str) -> None:
                     await self._run_session(read_stream, write_stream, None)
             else:
                 print("📡 Opening StreamableHTTP transport connection with auth...")
-                async with streamablehttp_client(
+                async with streamable_http_client(
                     url=self.server_url,
                     auth=oauth_auth,
                     timeout=timedelta(seconds=60),

examples/snippets/clients/oauth_client.py

@@ -14,7 +14,7 @@
 
 from mcp import ClientSession
 from mcp.client.auth import OAuthClientProvider, TokenStorage
-from mcp.client.streamable_http import streamablehttp_client
+from mcp.client.streamable_http import streamable_http_client
 from mcp.shared.auth import OAuthClientInformationFull, OAuthClientMetadata, OAuthToken
 
 
@@ -68,7 +68,7 @@ async def main():
         callback_handler=handle_callback,
     )
 
-    async with streamablehttp_client("http://localhost:8001/mcp", auth=oauth_auth) as (read, write, _):
+    async with streamable_http_client("http://localhost:8001/mcp", auth=oauth_auth) as (read, write, _):
         async with ClientSession(read, write) as session:
             await session.initialize()
 

examples/snippets/clients/streamable_basic.py

@@ -6,12 +6,12 @@
 import asyncio
 
 from mcp import ClientSession
-from mcp.client.streamable_http import streamablehttp_client
+from mcp.client.streamable_http import streamable_http_client
 
 
 async def main():
     # Connect to a streamable HTTP server
-    async with streamablehttp_client("http://localhost:8000/mcp") as (
+    async with streamable_http_client("http://localhost:8000/mcp") as (
         read_stream,
         write_stream,
         _,

src/mcp/client/session_group.py

@@ -25,7 +25,7 @@
 from mcp.client.session import ElicitationFnT, ListRootsFnT, LoggingFnT, MessageHandlerFnT, SamplingFnT
 from mcp.client.sse import sse_client
 from mcp.client.stdio import StdioServerParameters
-from mcp.client.streamable_http import streamablehttp_client
+from mcp.client.streamable_http import streamable_http_client
 from mcp.shared.exceptions import McpError
 from mcp.shared.session import ProgressFnT
 
@@ -47,7 +47,7 @@ class SseServerParameters(BaseModel):
 
 
 class StreamableHttpParameters(BaseModel):
-    """Parameters for intializing a streamablehttp_client."""
+    """Parameters for intializing a streamable_http_client."""
 
     # The endpoint URL.
     url: str
@@ -309,7 +309,7 @@ async def _establish_session(
                 )
                 read, write = await session_stack.enter_async_context(client)
             else:
-                client = streamablehttp_client(
+                client = streamable_http_client(
                     url=server_params.url,
                     headers=server_params.headers,
                     timeout=server_params.timeout,

src/mcp/client/streamable_http.py

@@ -17,6 +17,7 @@
 from anyio.abc import TaskGroup
 from anyio.streams.memory import MemoryObjectReceiveStream, MemoryObjectSendStream
 from httpx_sse import EventSource, ServerSentEvent, aconnect_sse
+from typing_extensions import deprecated
 
 from mcp.shared._httpx_utils import McpHttpClientFactory, create_mcp_http_client
 from mcp.shared.message import ClientMessageMetadata, SessionMessage
@@ -560,7 +561,7 @@ def get_session_id(self) -> str | None:
 
 
 @asynccontextmanager
-async def streamablehttp_client(
+async def streamable_http_client(
     url: str,
     headers: dict[str, str] | None = None,
     timeout: float | timedelta = 30,
@@ -629,3 +630,23 @@ def start_get_stream() -> None:
         finally:
             await read_stream_writer.aclose()
             await write_stream.aclose()
+
+
+@deprecated("Use `streamable_http_client` instead.")
+@asynccontextmanager
+async def streamablehttp_client(
+    url: str,
+    headers: dict[str, str] | None = None,
+    timeout: float | timedelta = 30,
+    sse_read_timeout: float | timedelta = 60 * 5,
+    terminate_on_close: bool = True,
+) -> AsyncGenerator[
+    tuple[
+        MemoryObjectReceiveStream[SessionMessage | Exception],
+        MemoryObjectSendStream[SessionMessage],
+        GetSessionIdCallback,
+    ],
+    None,
+]:
+    async with streamable_http_client(url, headers, timeout, sse_read_timeout, terminate_on_close) as streams:
+        yield streams

tests/client/test_session_group.py

@@ -280,7 +280,7 @@ async def test_disconnect_non_existent_server(self):
             (
                 StreamableHttpParameters(url="http://test.com/stream", terminate_on_close=False),
                 "streamablehttp",
-                "mcp.client.session_group.streamablehttp_client",
+                "mcp.client.session_group.streamable_http_client",
             ),  # url, headers, timeout, sse_read_timeout, terminate_on_close
         ],
     )
@@ -296,7 +296,7 @@ async def test_establish_session_parameterized(
                 mock_read_stream = mock.AsyncMock(name=f"{client_type_name}Read")
                 mock_write_stream = mock.AsyncMock(name=f"{client_type_name}Write")
 
-                # streamablehttp_client's __aenter__ returns three values
+                # streamable_http_client's __aenter__ returns three values
                 if client_type_name == "streamablehttp":
                     mock_extra_stream_val = mock.AsyncMock(name="StreamableExtra")
                     mock_client_cm_instance.__aenter__.return_value = (

tests/server/fastmcp/test_integration.py

@@ -34,10 +34,7 @@
 )
 from mcp.client.session import ClientSession
 from mcp.client.sse import sse_client
-from mcp.client.streamable_http import GetSessionIdCallback, streamablehttp_client
-from mcp.shared.context import RequestContext
-from mcp.shared.message import SessionMessage
-from mcp.shared.session import RequestResponder
+from mcp.client.streamable_http import streamable_http_client
 from mcp.types import (
     ClientResult,
     CreateMessageRequestParams,
@@ -179,7 +176,7 @@ def create_client_for_transport(transport: str, server_url: str):
         return sse_client(endpoint)
     elif transport == "streamable-http":
         endpoint = f"{server_url}/mcp"
-        return streamablehttp_client(endpoint)
+        return streamable_http_client(endpoint)
     else:  # pragma: no cover
         raise ValueError(f"Invalid transport: {transport}")