chore: import upstream snapshot with attribution

examples/servers/simple-tool/README.md

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+
+A simple MCP server that exposes a website fetching tool.
+
+## Usage
+
+Start the server using either stdio (default) or Streamable HTTP transport:
+
+```bash
+# Using stdio transport (default)
+uv run mcp-simple-tool
+
+# Using Streamable HTTP transport on custom port
+uv run mcp-simple-tool --transport streamable-http --port 8000
+```
+
+The server exposes a tool named "fetch" that accepts one required argument:
+
+- `url`: The URL of the website to fetch
+
+## Example
+
+Using the MCP client, you can use the tool like this using the STDIO transport:
+
+```python
+import asyncio
+from mcp.client.session import ClientSession
+from mcp.client.stdio import StdioServerParameters, stdio_client
+
+
+async def main():
+    async with stdio_client(
+        StdioServerParameters(command="uv", args=["run", "mcp-simple-tool"])
+    ) as (read, write):
+        async with ClientSession(read, write) as session:
+            await session.initialize()
+
+            # List available tools
+            tools = await session.list_tools()
+            print(tools)
+
+            # Call the fetch tool
+            result = await session.call_tool("fetch", {"url": "https://example.com"})
+            print(result)
+
+
+asyncio.run(main())
+
+```

examples/servers/simple-tool/mcp_simple_tool/__main__.py

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+import sys
+
+from .server import main
+
+sys.exit(main())  # type: ignore[call-arg]

examples/servers/simple-tool/mcp_simple_tool/server.py

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+import anyio
+import click
+import mcp_types as types
+from mcp.server import Server, ServerRequestContext
+from mcp.shared._httpx_utils import create_mcp_http_client
+
+
+async def fetch_website(
+    url: str,
+) -> list[types.ContentBlock]:
+    headers = {"User-Agent": "MCP Test Server (github.com/modelcontextprotocol/python-sdk)"}
+    async with create_mcp_http_client(headers=headers) as client:
+        response = await client.get(url)
+        response.raise_for_status()
+        return [types.TextContent(type="text", text=response.text)]
+
+
+async def handle_list_tools(
+    ctx: ServerRequestContext, params: types.PaginatedRequestParams | None
+) -> types.ListToolsResult:
+    return types.ListToolsResult(
+        tools=[
+            types.Tool(
+                name="fetch",
+                title="Website Fetcher",
+                description="Fetches a website and returns its content",
+                input_schema={
+                    "type": "object",
+                    "required": ["url"],
+                    "properties": {
+                        "url": {
+                            "type": "string",
+                            "description": "URL to fetch",
+                        }
+                    },
+                },
+            )
+        ]
+    )
+
+
+async def handle_call_tool(ctx: ServerRequestContext, params: types.CallToolRequestParams) -> types.CallToolResult:
+    if params.name != "fetch":
+        raise ValueError(f"Unknown tool: {params.name}")
+    arguments = params.arguments or {}
+    if "url" not in arguments:
+        raise ValueError("Missing required argument 'url'")
+    content = await fetch_website(arguments["url"])
+    return types.CallToolResult(content=content)
+
+
+@click.command()
+@click.option("--port", default=8000, help="Port to listen on for HTTP")
+@click.option(
+    "--transport",
+    type=click.Choice(["stdio", "streamable-http"]),
+    default="stdio",
+    help="Transport type",
+)
+def main(port: int, transport: str) -> int:
+    app = Server(
+        "mcp-website-fetcher",
+        on_list_tools=handle_list_tools,
+        on_call_tool=handle_call_tool,
+    )
+
+    if transport == "streamable-http":
+        import uvicorn
+
+        uvicorn.run(app.streamable_http_app(), host="127.0.0.1", port=port)
+    else:
+        from mcp.server.stdio import stdio_server
+
+        async def arun():
+            async with stdio_server() as streams:
+                await app.run(streams[0], streams[1], app.create_initialization_options())
+
+        anyio.run(arun)
+
+    return 0

examples/servers/simple-tool/pyproject.toml

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+[project]
+name = "mcp-simple-tool"
+version = "0.1.0"
+description = "A simple MCP server exposing a website fetching tool"
+readme = "README.md"
+requires-python = ">=3.10"
+authors = [{ name = "Model Context Protocol a Series of LF Projects, LLC." }]
+keywords = ["mcp", "llm", "automation", "web", "fetch"]
+license = { text = "MIT" }
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+]
+dependencies = ["anyio>=4.5", "click>=8.2.0", "httpx>=0.27", "mcp"]
+
+[project.scripts]
+mcp-simple-tool = "mcp_simple_tool.server:main"
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = ["mcp_simple_tool"]
+
+[tool.pyright]
+include = ["mcp_simple_tool"]
+venvPath = "."
+venv = ".venv"
+
+[tool.ruff.lint]
+select = ["E", "F", "I"]
+ignore = []
+
+[tool.ruff]
+line-length = 120
+target-version = "py310"
+
+[dependency-groups]
+dev = ["pyright>=1.1.378", "pytest>=8.3.3", "ruff>=0.6.9"]