René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"401 from /sse after upgrading to 1.7.0","articleBody":"**Describe the bug**\nMCP stop working due to auth error after upgrading from 1.6.0 to 1.7.0\n\n**To Reproduce**\n```\nmcp: FastMCP = FastMCP()\n\n@mcp.tool()\ndef add_two_integers(a: int, b: int) -\u003e int:\n    \"\"\"\n    Adds two integers.\n\n    Args:\n        a (int): The first integer.\n        b (int): The second integer.\n\n    Returns:\n        int: The sum of the two integers.\n    \"\"\"\n    return a + b\n\napp: FastAPI = FastAPI()\n\napp.mount(\"/\", mcp.sse_app())\n```\n\n**Expected behavior**\nAbove is a super simple example to bind mcp to fastapi, I start with uvicorn, it works just fine with 1.6.0 but stop working in 1.7.0 due to 401 from /sse. Here I'm not configuring any auth so expecting no auth check.\n\n","author":{"url":"https://github.com/xwhysi","@type":"Person","name":"xwhysi"},"datePublished":"2025-05-02T00:40:24.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/613/python-sdk/issues/613"}