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Add FastMCPApp — a Provider for composable MCP applications #3385

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Merged
jlowin merged 10 commits into from
Mar 9, 2026
+1,375 −18
Merged

Add FastMCPApp — a Provider for composable MCP applications #3385

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665b8ae
Add FastMCPApp — a Provider for composable MCP applications
jlowin Mar 4, 2026
9177a42
Wire Prefab callable resolver via to_json(tool_resolver=) parameter
jlowin Mar 4, 2026
f74db07
Remove inspect.signature compat check, use try/except until prefab 0.…
jlowin Mar 4, 2026
4ff28a6
Address review: fix add_tool registry gaps, normalize auth errors, bu…
jlowin Mar 4, 2026
a2a9da4
Register global key after _add_component succeeds
jlowin Mar 4, 2026
483b030
Simplify: extract decorator dispatch, use get_fastmcp_meta, expose ge…
jlowin Mar 4, 2026
e78db79
Remove prek from Marvin workflows
jlowin Mar 7, 2026
26e74f5
Return ResolvedTool from callable resolver, add contacts example
jlowin Mar 8, 2026
2a8ca73
Bump prefab-ui requirement to >=0.11.0
jlowin Mar 9, 2026
ede26e2
Remove stale ty ignore comments now that prefab-ui 0.11 is published
jlowin Mar 9, 2026
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6 changes: 6 additions & 0 deletions src/fastmcp/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@

if TYPE_CHECKING:
from fastmcp.client import Client as Client
from fastmcp.server.app import FastMCPApp as FastMCPApp

settings = Settings()
if settings.log_enabled:
Expand Down Expand Up @@ -40,6 +41,10 @@ def __getattr__(name: str) -> object:
from fastmcp.client import Client

return Client
if name == "FastMCPApp":
from fastmcp.server.app import FastMCPApp

return FastMCPApp
if name == "client":
return importlib.import_module("fastmcp.client")
raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
Expand All @@ -49,5 +54,6 @@ def __getattr__(name: str) -> object:
"Client",
"Context",
"FastMCP",
"FastMCPApp",
"settings",
]
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