chore: import upstream snapshot with attribution

examples/mcp/manager_example/mcp_server.py

@@ -0,0 +1,26 @@
+import os
+
+from mcp.server.fastmcp import FastMCP
+
+STREAMABLE_HTTP_HOST = os.getenv("STREAMABLE_HTTP_HOST", "127.0.0.1")
+STREAMABLE_HTTP_PORT = int(os.getenv("STREAMABLE_HTTP_PORT", "8000"))
+
+mcp = FastMCP(
+    "FastAPI Example Server",
+    host=STREAMABLE_HTTP_HOST,
+    port=STREAMABLE_HTTP_PORT,
+)
+
+
+@mcp.tool()
+def add(a: int, b: int) -> int:
+    return a + b
+
+
+@mcp.tool()
+def echo(message: str) -> str:
+    return f"echo: {message}"
+
+
+if __name__ == "__main__":
+    mcp.run(transport="streamable-http")