mcp local server without specific client failed with keyv error

npm install -g @neondatabase/mcp-server-neon

npx -y @neondatabase/mcp-server-neon start <YOUR_NEON_API_KEY>

error:  Clients keyv error: {"err":{"address":"127.0.0.1","code":"ECONNREFUSED","errno":-111,"port":5432,"syscall":"connect"},"timestamp":"2025-05-10T17:13:29.226Z"}
error:  Tokens keyv error: {"err":{"address":"127.0.0.1","code":"ECONNREFUSED","errno":-111,"port":5432,"syscall":"connect"},"timestamp":"2025-05-10T17:13:29.227Z"}
error:  Refresh tokens keyv error: {"err":{"address":"127.0.0.1","code":"ECONNREFUSED","errno":-111,"port":5432,"syscall":"connect"},"timestamp":"2025-05-10T17:13:29.227Z"}
error:  Authorization codes keyv error: {"err":{"address":"127.0.0.1","code":"ECONNREFUSED","errno":-111,"port":5432,"syscall":"connect"},"timestamp":"2025-05-10T17:13:29.227Z"}

error:  Server error: Unexpected end of JSON input {"error":{},"timestamp":"2025-05-10T17:13:54.417Z"}