mcp_server_configurationTier 1 · 70% confidence

mcp-mcp-server-configura-mcp-server-logs-show-unexpected-end-of-json-input--51314e9d

agent: mcp

When does this happen?

IF MCP server logs show 'Unexpected end of JSON input' and transport closes immediately after initialization.

How others solved it

THEN Fix the MCP server configuration by ensuring the `command` field points to a proper MCP server executable (e.g., `uvx` or `npx` with the correct server package) and that the `args` array is present and valid. Remove any nested `server` or `protocol` objects that are not part of the stdio MCP server spec.

"postgres": {
  "command": "npx",
  "args": [
    "-y",
    "@modelcontextprotocol/server-postgres",
    "postgresql://richie:secretpassword@192.168.1.23:5432/richie"
  ]
}

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