Add SSE polling support (SEP-1699) (#1654)

examples/servers/sse-polling-demo/pyproject.toml

@@ -0,0 +1,36 @@
+[project]
+name = "mcp-sse-polling-demo"
+version = "0.1.0"
+description = "Demo server showing SSE polling with close_sse_stream for long-running tasks"
+readme = "README.md"
+requires-python = ">=3.10"
+authors = [{ name = "Anthropic, PBC." }]
+keywords = ["mcp", "sse", "polling", "streamable", "http"]
+license = { text = "MIT" }
+dependencies = ["anyio>=4.5", "click>=8.2.0", "httpx>=0.27", "mcp", "starlette", "uvicorn"]
+
+[project.scripts]
+mcp-sse-polling-demo = "mcp_sse_polling_demo.server:main"
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = ["mcp_sse_polling_demo"]
+
+[tool.pyright]
+include = ["mcp_sse_polling_demo"]
+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"]