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Remove from_client classmethod (deprecated 2.8.0) #2343

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Merged
jlowin merged 2 commits into from
Nov 1, 2025
Merged

Remove from_client classmethod (deprecated 2.8.0) #2343

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da888ca
Remove deprecated from_client classmethod (fixes #2192)
jlowin Nov 1, 2025
396b46b
Remove unused Client import
jlowin Nov 1, 2025
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17 changes: 0 additions & 17 deletions src/fastmcp/server/server.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2483,23 +2483,6 @@ def proxy_client_factory():

return FastMCPProxy(client_factory=client_factory, **settings)

@classmethod
def from_client(
cls, client: Client[ClientTransportT], **settings: Any
) -> FastMCPProxy:
"""
Create a FastMCP proxy server from a FastMCP client.
"""
# Deprecated since 2.3.5
if fastmcp.settings.deprecation_warnings:
warnings.warn(
"FastMCP.from_client() is deprecated; use FastMCP.as_proxy() instead.",
DeprecationWarning,
stacklevel=2,
)

return cls.as_proxy(client, **settings)

def _should_enable_component(
self,
component: FastMCPComponent,
Expand Down
9 changes: 1 addition & 8 deletions tests/deprecated/test_deprecated.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
import pytest
from starlette.applications import Starlette

from fastmcp import Client, FastMCP
from fastmcp import FastMCP
from fastmcp.utilities.tests import temporary_settings

# reset deprecation warnings for this module
Expand Down Expand Up @@ -46,10 +46,3 @@ def test_http_app_with_sse_transport():
w for w in recorded_warnings if issubclass(w.category, DeprecationWarning)
]
assert len(deprecation_warnings) == 0


def test_from_client_deprecation_warning():
"""Test that FastMCP.from_client raises a deprecation warning."""
server = FastMCP("TestServer")
with pytest.warns(DeprecationWarning, match="from_client"):
FastMCP.from_client(Client(server))
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