pyproject.toml

[project]
name = "fastmcp"
dynamic = ["version", "dependencies", "optional-dependencies"]
description = "The fast, Pythonic way to build MCP servers and clients."
authors = [{ name = "Jeremiah Lowin" }]
requires-python = ">=3.10"
readme = "README.md"
license = "Apache-2.0"
keywords = [
    "mcp",
    "mcp server",
    "mcp client",
    "model context protocol",
    "fastmcp",
    "llm",
    "agent",
]
classifiers = [
    "Intended Audience :: Developers",
    "License :: OSI Approved :: Apache Software License",
    "Topic :: Scientific/Engineering :: Artificial Intelligence",
    "Programming Language :: Python :: 3.10",
    "Programming Language :: Python :: 3.11",
    "Programming Language :: Python :: 3.12",
    "Programming Language :: Python :: 3.13",
    "Typing :: Typed",
]

[project.urls]
Homepage = "https://gofastmcp.com"
Repository = "https://github.com/PrefectHQ/fastmcp"
Documentation = "https://gofastmcp.com"

[build-system]
requires = ["hatchling", "uv-dynamic-versioning>=0.7.0"]
build-backend = "hatchling.build"

[tool.hatch.version]
source = "uv-dynamic-versioning"

[tool.hatch.build.targets.wheel]
bypass-selection = true
only-include = []
exclude = ["/*"]

[tool.hatch.metadata]
allow-direct-references = true

[tool.hatch.metadata.hooks.uv-dynamic-versioning]
dependencies = [
    "fastmcp-slim[client,server]=={{ version }}",
]

[tool.hatch.metadata.hooks.uv-dynamic-versioning.optional-dependencies]
anthropic = ["fastmcp-slim[anthropic]=={{ version }}"]
apps = ["fastmcp-slim[apps]=={{ version }}"]
azure = ["fastmcp-slim[azure]=={{ version }}"]
code-mode = ["fastmcp-slim[code-mode]=={{ version }}"]
gemini = ["fastmcp-slim[gemini]=={{ version }}"]
openai = ["fastmcp-slim[openai]=={{ version }}"]
tasks = ["fastmcp-tasks=={{ version }}"]

[tool.uv-dynamic-versioning]
vcs = "git"
style = "pep440"
bump = true
fallback-version = "0.0.0"

[tool.uv.workspace]
members = ["fastmcp_slim", "fastmcp_remote", "fastmcp_tasks"]

[tool.uv]
default-groups = ["dev"]
exclude-newer = "1 week"
# The cooldown above refuses anything published in the last week. Exempt the
# first-party packages, whose fresh releases we install deliberately, the
# MCP SDK, where a new major is the only version satisfying our floor and so
# has nothing older to fall back to, and uncalled-for, the DI engine whose
# releases we adopt deliberately.
exclude-newer-package = { fastmcp = false, fastmcp-slim = false, fastmcp-remote = false, prefab-ui = false, mcp = false, mcp-types = false, uncalled-for = false, pydocket = false }

[dependency-groups]
dev = [
    "dirty-equals>=0.9.0",
    "fastmcp[anthropic,apps,azure,code-mode,gemini,openai,tasks]",
    "fastapi>=0.115.12",
    "fastmcp-remote",
    "opentelemetry-sdk>=1.20.0",
    "inline-snapshot[dirty-equals]>=0.27.2",
    "ipython>=8.12.3",
    "pdbpp>=0.11.7",
    "psutil>=7.0.0",
    "pyinstrument>=5.0.2",
    "pyperclip>=1.9.0",
    "pytest>=8.3.3",
    "pytest-asyncio>=1.2.0",
    "pytest-cov>=6.1.1",
    "pytest-env>=1.1.5",
    "pytest-flakefinder>=1.1.0",
    "pytest-report>=0.2.1",
    "pytest-retry>=1.7.0",
    "pytest-timeout>=2.4.0",
    "pytest-xdist>=3.6.1",
    "ruff>=0.12.8",
    "ty>=0.0.69",
    "prek>=0.2.12",
    "loq>=0.1.0a3",
    "opentelemetry-exporter-otlp-proto-grpc>=1.39.0",
    "pytest-examples>=0.0.18",
]

[tool.uv.sources]
fastmcp = { workspace = true }
fastmcp-slim = { workspace = true }
fastmcp-remote = { workspace = true }
fastmcp-tasks = { workspace = true }

[tool.pytest.ini_options]
asyncio_mode = "auto"
asyncio_default_fixture_loop_scope = "function"
filterwarnings = [
    "ignore:Using in-memory token storage:UserWarning",
    "error:coroutine .* was never awaited:RuntimeWarning",
    "error:Exception ignored in.*coroutine:pytest.PytestUnraisableExceptionWarning",
]
timeout = 5
env = [
    "FASTMCP_TEST_MODE=1",
    'D:FASTMCP_LOG_LEVEL=DEBUG',
    'D:FASTMCP_ENABLE_RICH_TRACEBACKS=0',
]
markers = [
    "integration: marks tests as integration tests (deselect with '-m \"not integration\"')",
    "client_process: marks tests that spawn client processes via stdio transport. These can create issues when run in the same CI environment as other subprocess-based tests.",
    "subprocess_heavy: marks tests that spawn a fresh Python interpreter which imports FastMCP. Each one costs a full interpreter's memory and startup, so they run serially alongside client_process tests rather than competing with parallel xdist workers.",
    "conformance: marks MCP conformance tests (require Node.js/npx)",
]
pythonpath = ["fastmcp_slim", "fastmcp_remote", "fastmcp_tasks"]
testpaths = ["tests"]
python_files = ["test_*.py", "*_test.py"]
python_classes = ["Test*"]
python_functions = ["test_*"]
addopts = ["--inline-snapshot=disable"]

[tool.ty.src]
include = ["fastmcp_slim", "fastmcp_remote", "fastmcp_tasks", "tests", "examples"]
exclude = [
    "**/node_modules",
    "**/__pycache__",
    ".venv",
    ".git",
    "dist",
    # Example subtrees excluded from the ty gate. Each either pins its own
    # fastmcp (resolved against a different install) or requires a third-party
    # dependency not installed in this tree.
    "examples/testing_demo",             # own uv.lock, targets fastmcp v1 on purpose
    "examples/atproto_mcp",              # needs atproto (+ its own package)
    "examples/smart_home",              # needs phue
    "examples/apps/qr_server",          # needs qrcode
    "examples/providers/sqlite",        # needs aiosqlite
    "examples/fastmcp_config_demo",     # needs pyautogui, Pillow
    "examples/screenshot.py",           # needs pyautogui, Pillow
    "examples/memory.py",               # needs asyncpg, numpy, pydantic_ai, pgvector
    "examples/get_file.py",             # needs aiohttp
]

[tool.ty.environment]
python-version = "3.10"

[tool.ty.analysis]
# prefab_ui is the apps SDK and is not installed here.
replace-imports-with-any = ["prefab_ui.**"]

[tool.ty.rules]
division-by-zero = "warn"
possibly-missing-attribute = "warn"
possibly-missing-import = "warn"
possibly-unresolved-reference = "warn"
unsupported-dynamic-base = "warn"
unsupported-operator = "warn"
unused-ignore-comment = "warn"

[tool.ty.terminal]
error-on-warning = true

[tool.ruff.lint]
fixable = ["ALL"]
ignore = [
    "COM812",
    "PERF203",
    "PLR0913",
    "SIM102",
]
extend-select = [
    "B",
    "C4",
    "DTZ",
    "ERA",
    "FA",
    "FLY",
    "I",
    "INP",
    "ISC",
    "LOG",
    "PERF",
    "PIE",
    "PLE",
    "RSE",
    "RUF",
    "SIM",
    "SLOT",
    "T20",
    "TID",
    "UP",
]

[tool.ruff.lint.isort]
known-first-party = ["fastmcp", "fastmcp_remote"]

[tool.ruff.lint.per-file-ignores]
"__init__.py" = ["F401", "I001", "RUF013"]
"fastmcp_slim/fastmcp/__init__.py" = ["E402"]
"fastmcp_slim/fastmcp/cli/**.py" = ["T20"]
"fastmcp_slim/fastmcp/client/oauth_callback.py" = ["T20"]
"fastmcp_slim/fastmcp/contrib/**/example.py" = ["T20"]
"!fastmcp_slim/fastmcp/**.py" = [
    "B",
    "C4",
    "DTZ",
    "ERA",
    "FA",
    "FLY",
    "INP",
    "ISC",
    "LOG",
    "PERF",
    "PIE",
    "PLE",
    "RSE",
    "RUF",
    "SIM",
    "SLOT",
    "T20",
    "TID",
]

[tool.codespell]
ignore-words-list = "asend,shttp,te"