fix: use streamable_http_client instead of deprecated streamablehttp_client

- Update import in mcp_proxy_for_aws/client.py to use streamable_http_client
- Update fastmcp dependency from (>=2.13.1,<2.14.1) to (>=2.14.1,<3.0.0)
- Adapt to new API where httpx client is created and passed instead of factory
- Update test mocks to reflect the new API structure
- Resolves deprecation warning introduced in fastmcp 2.14.1+

Fixes #128

Author: dap0am

mcp_proxy_for_aws/client.py

@@ -18,7 +18,7 @@
 from botocore.credentials import Credentials
 from contextlib import _AsyncGeneratorContextManager
 from datetime import timedelta
-from mcp.client.streamable_http import GetSessionIdCallback, streamablehttp_client
+from mcp.client.streamable_http import GetSessionIdCallback, streamable_http_client
 from mcp.shared._httpx_utils import McpHttpClientFactory, create_mcp_http_client
 from mcp.shared.message import SessionMessage
 from mcp_proxy_for_aws.sigv4_helper import SigV4HTTPXAuth
@@ -114,7 +114,7 @@ def aws_iam_streamablehttp_client(
     auth = SigV4HTTPXAuth(creds, aws_service, region)
 
     # Return the streamable HTTP client context manager with AWS IAM authentication
-    return streamablehttp_client(
+    return streamable_http_client(
         url=endpoint,
         headers=headers,
         timeout=timeout,

pyproject.toml

@@ -16,7 +16,7 @@ description = "MCP Proxy for AWS"
 readme = "README.md"
 requires-python = ">=3.10,<3.15"
 dependencies = [
-    "fastmcp (>=2.13.1,<2.14.1)",
+    "fastmcp>=2.14.1,<3.0.0",
     "boto3>=1.41.0",
     "botocore[crt]>=1.41.0",
 ]

tests/unit/test_client.py

@@ -60,7 +60,7 @@ async def test_boto3_session_parameters(
     mock_read, mock_write, mock_get_session = mock_streams
 
     with patch('boto3.Session', return_value=mock_session) as mock_boto:
-        with patch('mcp_proxy_for_aws.client.streamablehttp_client') as mock_stream_client:
+        with patch('mcp_proxy_for_aws.client.streamable_http_client') as mock_stream_client:
             mock_stream_client.return_value.__aenter__ = AsyncMock(
                 return_value=(mock_read, mock_write, mock_get_session)
             )
@@ -94,7 +94,7 @@ async def test_sigv4_auth_is_created_and_used(mock_session, mock_streams, servic
 
     with patch('boto3.Session', return_value=mock_session):
         with patch('mcp_proxy_for_aws.client.SigV4HTTPXAuth') as mock_auth_cls:
-            with patch('mcp_proxy_for_aws.client.streamablehttp_client') as mock_stream_client:
+            with patch('mcp_proxy_for_aws.client.streamable_http_client') as mock_stream_client:
                 mock_auth = Mock()
                 mock_auth_cls.return_value = mock_auth
                 mock_stream_client.return_value.__aenter__ = AsyncMock(
@@ -137,7 +137,7 @@ async def test_streamable_client_parameters(
     mock_read, mock_write, mock_get_session = mock_streams
 
     with patch('boto3.Session', return_value=mock_session):
-        with patch('mcp_proxy_for_aws.client.streamablehttp_client') as mock_stream_client:
+        with patch('mcp_proxy_for_aws.client.streamable_http_client') as mock_stream_client:
             mock_stream_client.return_value.__aenter__ = AsyncMock(
                 return_value=(mock_read, mock_write, mock_get_session)
             )
@@ -170,7 +170,7 @@ async def test_custom_httpx_client_factory_is_passed(mock_session, mock_streams)
     custom_factory = Mock()
 
     with patch('boto3.Session', return_value=mock_session):
-        with patch('mcp_proxy_for_aws.client.streamablehttp_client') as mock_stream_client:
+        with patch('mcp_proxy_for_aws.client.streamable_http_client') as mock_stream_client:
             mock_stream_client.return_value.__aenter__ = AsyncMock(
                 return_value=(mock_read, mock_write, mock_get_session)
             )
@@ -198,7 +198,7 @@ async def mock_aexit(*_):
         cleanup_called = True
 
     with patch('boto3.Session', return_value=mock_session):
-        with patch('mcp_proxy_for_aws.client.streamablehttp_client') as mock_stream_client:
+        with patch('mcp_proxy_for_aws.client.streamable_http_client') as mock_stream_client:
             mock_stream_client.return_value.__aenter__ = AsyncMock(
                 return_value=(mock_read, mock_write, mock_get_session)
             )
@@ -220,7 +220,7 @@ async def test_credentials_parameter_with_region(mock_streams):
     creds = Credentials('test_key', 'test_secret', 'test_token')
 
     with patch('mcp_proxy_for_aws.client.SigV4HTTPXAuth') as mock_auth_cls:
-        with patch('mcp_proxy_for_aws.client.streamablehttp_client') as mock_stream_client:
+        with patch('mcp_proxy_for_aws.client.streamable_http_client') as mock_stream_client:
             mock_auth = Mock()
             mock_auth_cls.return_value = mock_auth
             mock_stream_client.return_value.__aenter__ = AsyncMock(
@@ -264,7 +264,7 @@ async def test_credentials_parameter_bypasses_boto3_session(mock_streams):
 
     with patch('boto3.Session') as mock_boto:
         with patch('mcp_proxy_for_aws.client.SigV4HTTPXAuth'):
-            with patch('mcp_proxy_for_aws.client.streamablehttp_client') as mock_stream_client:
+            with patch('mcp_proxy_for_aws.client.streamable_http_client') as mock_stream_client:
                 mock_stream_client.return_value.__aenter__ = AsyncMock(
                     return_value=(mock_read, mock_write, mock_get_session)
                 )