Fix MCP endpoint for Claude.ai connector (serve at root path)

FastMCP defaults to /mcp but Claude.ai sends requests to /.
Add MCP_PATH env var to configure the endpoint path, set to /
in docker-compose for the connector subdomain.

Makefile

@@ -5,7 +5,7 @@ dev:
 	@echo "Starting mcnoaa-tides in development mode..."
 	APP_ENV=dev docker compose up -d --build
 	@echo "Docs: https://$(shell grep DOMAIN .env | head -1 | cut -d= -f2)"
-	@echo "MCP:  https://mcp.$(shell grep DOMAIN .env | head -1 | cut -d= -f2)/mcp"
+	@echo "MCP:  https://mcp.$(shell grep DOMAIN .env | head -1 | cut -d= -f2)/"
 	@sleep 2
 	docker compose logs -f
 
@@ -13,7 +13,7 @@ prod:
 	@echo "Starting mcnoaa-tides in production mode..."
 	APP_ENV=prod docker compose up -d --build
 	@echo "Docs: https://$(shell grep DOMAIN .env | head -1 | cut -d= -f2)"
-	@echo "MCP:  https://mcp.$(shell grep DOMAIN .env | head -1 | cut -d= -f2)/mcp"
+	@echo "MCP:  https://mcp.$(shell grep DOMAIN .env | head -1 | cut -d= -f2)/"
 	@sleep 3
 	docker compose logs --tail=20
 

docker-compose.yml

@@ -39,6 +39,7 @@ services:
       - MCP_TRANSPORT=streamable-http
       - MCP_HOST=0.0.0.0
       - MCP_PORT=8000
+      - MCP_PATH=/
     networks:
       - caddy
     labels:

src/mcnoaa_tides/server.py

@@ -73,6 +73,7 @@ def main():
     if transport == "streamable-http":
         host = os.environ.get("MCP_HOST", "0.0.0.0")
         port = int(os.environ.get("MCP_PORT", "8000"))
-        mcp.run(transport="streamable-http", host=host, port=port)
+        path = os.environ.get("MCP_PATH", "/mcp")
+        mcp.run(transport="streamable-http", host=host, port=port, path=path)
     else:
         mcp.run()