diff --git a/ratatoskr.sh b/ratatoskr.sh
index 08da983..de9d0bf 100755
--- a/ratatoskr.sh
+++ b/ratatoskr.sh
@@ -3,6 +3,22 @@
 # Hopefully one day this will be a full featured Pleroma client.
 # Let's see how far we can get. :)
 
+# Display usage information.
+help() {
+    echo "${0##*/}"
+    echo "Released under the terms of the WTFPL License"
+    echo -e "Usage:\n"
+    echo "With no arguments, open the interactive client."
+    for i in "${!command[@]}" ; do
+        echo "-${i/:/ <parameter>}: ${command[${i}]}"
+    done | sort
+    echo
+    echo "Configuration files can be found in ${configPath}"
+    echo
+    exit 0
+}
+
+
 # Get an oauth token
 get_oauth_token() {
     echo "Welcome to ${softwareName}!"
@@ -22,7 +38,7 @@ get_oauth_token() {
         # Load the new variables from the configuration file
         source "${configPath}/${configFile}"
     # Create the url to get the oauth token
-    local url="${instanceURL}/oauth/authorize?client_id=${client_id}&redirect_uri=https://billy.wolfe.casa/ratatoskr-success.html&response_type=code&scope=read%20write%20follow%20push"
+    local url="${instanceURL}/oauth/authorize?client_id=${client_id}&redirect_uri=${redirectURI}&response_type=code&scope=read%20write%20follow%20push"
     echo "Please open the following url in your browser."
     echo "Copy the generated token, and paste it here, then press enter to continue."
     echo
@@ -37,6 +53,15 @@ get_oauth_token() {
 }
 
 
+# Functions that deal with posting.
+
+# Post music with -M flag
+post_music() {
+    echo "Work in progress..."
+    exit 0
+}
+
+
 # Variable initialization
 configPath="${XDG_CONFIG_HOME:-$HOME/.config}/ratatoskr" # Path for settings, usually ~/.config/ratatoskr
 configFile="default.conf" # The default config file, eventually will support multiple accounts.
@@ -48,9 +73,30 @@ softwareName="Ratatoskr" # The name of the client.
 # make sure the configuration path exists:
 mkdir -p "${configPath}"
 
+# Associative array of command line parameters and short description of what they do.
+declare -A command=(
+    [h]="Help, show usage information for ${0##*/}."
+    [M]="Post the currently playing music track, requires playerctl."
+)
+
 # if the default file doesn't exist, create it
 if [[ ! -e "${configPath}/${configFile}" ]]; then
     get_oauth_token
+else
+    # Read configuration file
+    source "${configPath}/${configFile}"
 fi
 
+# Handle command line parameters
+# Convert the keys of the associative array to a format usable by getopts
+args="${!command[*]}"
+args="${args//[[:space:]]/}"
+while getopts "${args}" i ; do
+    case "$i" in
+        h) help;;
+        M) post_music;;
+    esac
+done
+
+
 exit 0