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Change default binding from 0.0.0.0 to 127.0.0.1 to align with security recommendations (#738)

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ciccolo-anthropic 2025-05-20 12:23:19 -07:00 • committed by GitHub
commit 2ca2de767b
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7 changed files with 7 additions and 7 deletions
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2
examples/servers/simple-prompt/mcp_simple_prompt/server.py
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@ -114,7 +114,7 @@ def main(port: int, transport: str) -> int:
import uvicorn
uvicorn.run(starlette_app, host="0.0.0.0", port=port)
uvicorn.run(starlette_app, host="127.0.0.1", port=port)
else:
from mcp.server.stdio import stdio_server

2
examples/servers/simple-resource/mcp_simple_resource/server.py
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@ -72,7 +72,7 @@ def main(port: int, transport: str) -> int:
import uvicorn
uvicorn.run(starlette_app, host="0.0.0.0", port=port)
uvicorn.run(starlette_app, host="127.0.0.1", port=port)
else:
from mcp.server.stdio import stdio_server

2
examples/servers/simple-streamablehttp-stateless/mcp_simple_streamablehttp_stateless/server.py
View file

@ -136,6 +136,6 @@ def main(
import uvicorn
uvicorn.run(starlette_app, host="0.0.0.0", port=port)
uvicorn.run(starlette_app, host="127.0.0.1", port=port)
return 0

2
examples/servers/simple-streamablehttp/mcp_simple_streamablehttp/server.py
View file

@ -164,6 +164,6 @@ def main(
import uvicorn
uvicorn.run(starlette_app, host="0.0.0.0", port=port)
uvicorn.run(starlette_app, host="127.0.0.1", port=port)
return 0

2
examples/servers/simple-tool/mcp_simple_tool/server.py
View file

@ -84,7 +84,7 @@ def main(port: int, transport: str) -> int:
import uvicorn
uvicorn.run(starlette_app, host="0.0.0.0", port=port)
uvicorn.run(starlette_app, host="127.0.0.1", port=port)
else:
from mcp.server.stdio import stdio_server

2
src/mcp/server/fastmcp/server.py
View file

@ -87,7 +87,7 @@ class Settings(BaseSettings, Generic[LifespanResultT]):
log_level: Literal["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"] = "INFO"
# HTTP settings
host: str = "0.0.0.0"
host: str = "127.0.0.1"
port: int = 8000
mount_path: str = "/" # Mount path (e.g. "/github", defaults to root path)
sse_path: str = "/sse"

2
src/mcp/server/sse.py
View file

@ -27,7 +27,7 @@ Example usage:
# Create and run Starlette app
starlette_app = Starlette(routes=routes)
uvicorn.run(starlette_app, host="0.0.0.0", port=port)
uvicorn.run(starlette_app, host="127.0.0.1", port=port)
```
Note: The handle_sse function must return a Response to avoid a "TypeError: 'NoneType'