Enable basic transport configuration

Author: xOxD

README.md

@@ -94,6 +94,20 @@ Make sure you complete the various fields.
 ```
 </details>
 
+## Transport Configuration
+
+By default, STDIO transport is used.
+
+To configure [SSE](https://modelcontextprotocol.io/specification/2024-11-05/basic/transports#http-with-sse) or [Streamable HTTP](https://modelcontextprotocol.io/specification/2025-03-26/basic/transports#streamable-http), set the `MCP_PROTOCOL` environment variable.
+
+Example:
+
+```bash
+MCP_PROTOCOL=streamable-http \
+POLYGON_API_KEY=<your_api_key_here> \
+uv run entrypoint.py
+```
+
 ## Usage Examples
 
 Once integrated, you can prompt Claude to access Polygon.io data:

entrypoint.py

@@ -10,7 +10,9 @@ def start_server():
     else:
         print("Starting Polygon MCP server with API key configured.")
 
-    server.run()
+    mcp_transport = os.environ.get("MCP_TRANSPORT") or "stdio"
+
+    server.run(mcp_transport)
 
 if __name__ == "__main__":
     start_server()

pyproject.toml

@@ -5,7 +5,7 @@ description = "A MCP server project"
 readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
- "mcp[cli]>=1.4.1",
+    "mcp[cli]>=1.9.3",
  "polygon-api-client>=1.14.5",
 ]
 [[project.authors]]

src/mcp_polygon/server.py

@@ -936,6 +936,6 @@ async def list_treasury_yields(
 # Directly expose the MCP server object
 # It will be run from entrypoint.py
 
-def run():
+def run(transport):
     """Run the Polygon MCP server."""
-    poly_mcp.run()
+    poly_mcp.run(transport)