diff --git a/README.md b/README.md
index 6a4237f..8e56109 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,88 @@
 # mikrus
 
-Go client library for [MIKRUS VPS](https://mikr.us) Provider
+`mikrus` is a Go library and command-line client for the the [MIKRUS VPS](https://mikr.us) provider. It allows you to interact with provisioned servers and perform various tasks, for example:
+
+- show information about your server
+- list provisioned servers
+- restart your server
+- check last log messages
+- boost your server performance by turning on Amfetamina functionality
+- show config for your DB(s) (Postgres, MySQL)
+- execute remote commands on your server
+- show usage / resource utilization statistics
+- show ports assigned to your server
+- show cloud functions assigned to your account (including stats)
+- add / change domain assigned to your server
+
+## Installing the command-line client
+
+To install the client binary, run:
+
+```shell
+go install github.com/qba73/mikrus/cmd/mikctl@latest
+```
+
+## Using the command-line client
+
+To see help on using the client, run:
+
+```shell
+mikctl -h
+```
+
+## Setting your API key and Server ID
+
+To use the client with your Mikrus account, you will need the API Key and Server ID provisioned in your Mikrus account. Go to the [Mikrus page](https://mikr.us/#pricing), sign up for the service. When your account is ready, go to the panel page and get your `server ID` and corresponding `API key`.
+
+There are three ways to pass your API key to the client: in a config file, in an environment variable, or on the command line.
+
+### In a config file
+
+The `mikctl` client will read a config file named `.mikrus.yaml` (or `.mikrus.json`, or any other extension that Viper supports) in your home directory, or in the current directory.
+
+For example, you can put your API key and sever ID in the file `$HOME/.mikrus.yaml`, and `mikctl` will find and read them automatically (replace `XXX` with your own API key, and `YYY` with your server ID):
+
+```yaml
+apiKey: XXX
+srvID: YYY
+```
+
+### In an environment variable
+
+`mikctl` will look for the API key and server ID in an environment variable named MIKRUS_API_KEY and MIKRUS_SRV_ID:
+
+```shell
+export MIKRUS_API_KEY=XXX
+export MIKRUS_SRV_ID=YYY
+mikctl ...
+```
+
+### On the command line
+
+You can also pass your API key and server ID to the `mikctl` client using the `--apiKey` and `--srvID` flags like this:
+
+```shell
+mikctl --apiKey XXX --srvID YYY
+```
+
+## Testing your configuration
+
+To test that your API key is correct and `mikctl` is reading it properly, run:
+
+```shell
+mikctl server
+```
+
+or
+
+```shell
+ mikctl --srvID YYY --apiKey XXX server
+```
+
+## Bugs and feature requests
+
+If you find a bug in the `mikrus` client or library, please [open an issue](https://github.com/qba73/mikrus/issues). Similarly, if you'd like a feature added or improved, let me know via an issue.
+
+Not all the functionality of the [Mikrus API](https://api.mikr.us) is implemented yet.
+
+Pull requests welcome!
diff --git a/cmd/root.go b/cmd/root.go
index c1854f9..93b7085 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -32,15 +32,13 @@ func Execute() {
 }
 
 var (
-	apiKey  string
-	srvID   string
-	cfgFile string
-	client  mikrus.Client
+	apiKey string
+	srvID  string
+	client mikrus.Client
 )
 
 func init() {
 	viper.SetConfigName(".mikrus")
-	viper.SetConfigType("yaml")
 	viper.AddConfigPath("$HOME")
 	viper.AddConfigPath(".")
 	if err := viper.ReadInConfig(); err != nil {
@@ -52,13 +50,12 @@ func init() {
 	cobra.OnInitialize(func() {
 		client = mikrus.New(viper.GetString("apiKey"), viper.GetString("srvID"))
 	})
+
 	rootCmd.PersistentFlags().StringVar(&apiKey, "apiKey", "", "Mikrus server API key")
-	rootCmd.PersistentFlags().StringVar(&srvID, "srvID", "", "Mikrus server ID")
 	viper.BindPFlag("apiKey", rootCmd.PersistentFlags().Lookup("apiKey"))
-	viper.BindEnv("apiKey", "API_KEY")
-	viper.BindPFlag("srvID", rootCmd.PersistentFlags().Lookup("srvID"))
-	viper.BindEnv("apiKey", "SRV_ID")
+	viper.BindEnv("apiKey", "MIKRUS_API_KEY")
 
-	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.mikrus.yaml)")
-	rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+	rootCmd.PersistentFlags().StringVar(&srvID, "srvID", "", "Mikrus server ID")
+	viper.BindPFlag("srvID", rootCmd.PersistentFlags().Lookup("srvID"))
+	viper.BindEnv("apiKey", "MIKRUS_SRV_ID")
 }