# nrm > npm registry manager. > Helps to easily switch between different npm registries. > More information: . - List all registries: `nrm ls` - Change to a particular registry: `nrm use {{registry}}` - Show the response time for all registries: `nrm test` - Add a custom registry: `nrm add {{registry}} {{url}}` - Delete a registry: `nrm del {{registry}}`