Cursor MCP via HTTP Streamable (oAuth) server not working anymore
Users of the Cursor IDE are reporting issues with its HTTP Streamable (oAuth) server, which has stopped working for remote MCP connections. This functionality, which previously worked, now fails specifically within Cursor, while other MCP clients like Codex and Claude can still connect to the same servers without error. The problem appears to be related to Streamable HTTP errors, with logs indicating failed SSE streams and tombstoning of the transport after repeated 404 responses. AI
IMPACT Potential disruption for developers using Cursor for AI-assisted coding workflows.