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2 issues

MCP server shows as disconnected in the client

Unverified

An MCP server fails to connect or repeatedly drops in the client.

mcpmcpconfigurationtransport

MCP server connection fails with error -32000 or -32001

Unverified

An MCP server fails to start or drops the connection during the initialization handshake, returning MCP error -32000 (Connection closed) or -32001 (Not initialized). ## Agent Decision Tree 1. Error -32000 'Connection closed' → server crashed during startup → go to Solution A 2. Error -32001 'Not initialized' → handshake incomplete → go to Solution B 3. Server uses npx and Node.js → check Solution C (nvm/npx PATH issue)

hermesclaude-codecodexmcpmcpconnectionstdio