René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"ClientSession.initialize gets stuck if the MCP server process exits","articleBody":"**Describe the bug**\n\nI'm using the [brave_search](https://github.com/modelcontextprotocol/servers/blob/main/src/brave-search) MCP server which exits(1) if BRAVE_API_KEY is not set. https://github.com/modelcontextprotocol/servers/blob/main/src/brave-search/index.ts#L85\n\nThis causes ClientSession.initialize to get stuck forever.\n\n**To Reproduce**\n\nSteps to reproduce the behavior:\n\nUse brave_search without setting BRAVE_API_KEY.\n\n**Expected behavior**\n\nWhen the process of an stdio_client exits an exception should be raised. \n\n**Screenshots**\n\nFrom this client implementation https://github.com/evilsocket/nerve/blob/main/nerve/tools/mcp/client.py\n\n![Image](https://github.com/user-attachments/assets/380f014b-d811-44b3-ac7f-7103bf34ba07)\n","author":{"url":"https://github.com/evilsocket","@type":"Person","name":"evilsocket"},"datePublished":"2025-04-04T13:01:45.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/428/python-sdk/issues/428"}