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{
lib,
stdenv,
buildPythonPackage,
fetchFromGitHub,
# build-system
hatchling,
uv-dynamic-versioning,
# dependencies
anyio,
httpx,
httpx-sse,
jsonschema,
pydantic,
pydantic-settings,
pyjwt,
python-multipart,
sse-starlette,
starlette,
uvicorn,
# optional-dependencies
# cli
python-dotenv,
typer,
# rich
rich,
# ws
websockets,
# tests
dirty-equals,
inline-snapshot,
pytest-asyncio,
pytest-examples,
pytest-xdist,
pytestCheckHook,
requests,
}:
buildPythonPackage rec {
pname = "mcp";
version = "1.25.0";
pyproject = true;
src = fetchFromGitHub {
owner = "modelcontextprotocol";
repo = "python-sdk";
tag = "v${version}";
hash = "sha256-fSQCvKaNMeCzguM2tcTJJlAeZQmzSJmbfEK35D8pQcs=";
};
# time.sleep(0.1) feels a bit optimistic and it has been flaky whilst
# testing this on macOS under load.
postPatch = lib.optionalString stdenv.buildPlatform.isDarwin ''
substituteInPlace tests/client/test_stdio.py \
--replace-fail "time.sleep(0.1)" "time.sleep(1)"
'';
build-system = [
hatchling
uv-dynamic-versioning
];
pythonRelaxDeps = [
"pydantic-settings"
];
dependencies = [
anyio
httpx
httpx-sse
jsonschema
pydantic
pydantic-settings
pyjwt
python-multipart
sse-starlette
starlette
uvicorn
];
optional-dependencies = {
cli = [
python-dotenv
typer
];
rich = [
rich
];
ws = [
websockets
];
};
pythonImportsCheck = [ "mcp" ];
nativeCheckInputs = [
dirty-equals
inline-snapshot
pytest-asyncio
pytest-examples
pytest-xdist
pytestCheckHook
requests
]
++ lib.concatAttrValues optional-dependencies;
disabledTests = [
# attempts to run the package manager uv
"test_command_execution"
# ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)
"test_lifespan_cleanup_executed"
# AssertionError: Child process should be writing
"test_basic_child_process_cleanup"
# AssertionError: parent process should be writing
"test_nested_process_tree"
# AssertionError: Child should be writing
"test_early_parent_exit"
# pytest.PytestUnraisableExceptionWarning: Exception ignored in: <_io.FileIO ...
"test_list_tools_returns_all_tools"
# AssertionError: Server startup marker not created
"test_stdin_close_triggers_cleanup"
# pytest.PytestUnraisableExceptionWarning: Exception ignored in: <function St..
"test_resource_template_client_interaction"
# Flaky: https://github.com/modelcontextprotocol/python-sdk/pull/1171
"test_notification_validation_error"
# Flaky: httpx.ConnectError: All connection attempts failed
"test_sse_security_"
"test_streamable_http_"
# This just feels a bit optimistic...
# assert duration < 3 * _sleep_time_seconds
# AssertionError: assert 0.0733884589999434 < (3 * 0.01)
"test_messages_are_executed_concurrently"
# ExceptionGroup: unhandled errors in a TaskGroup (1 sub-exception)
"test_tool_progress"
];
__darwinAllowLocalNetworking = true;
meta = {
changelog = "https://github.com/modelcontextprotocol/python-sdk/releases/tag/${src.tag}";
description = "Official Python SDK for Model Context Protocol servers and clients";
homepage = "https://github.com/modelcontextprotocol/python-sdk";
license = lib.licenses.mit;
maintainers = with lib.maintainers; [
bryanhonof
josh
];
};
}
|
