diff --git a/curl-ia b/curl-ia
index 676d3b2..4b56367 100755
--- a/curl-ia
+++ b/curl-ia
@@ -1,11 +1,15 @@
 #!/bin/bash
-if [[ "$#" -eq 0 || "$1" == '-h' || "$1" == '--help' ]]
+if [[ "$#" -eq 0 || ( "$1" != 'cookie' && "$1" != 'header' ) ]]
 then
-	echo 'Usage: curl-ia CURL-ARGUMENTS...' >&2
+	echo 'Usage: curl-ia MODE CURL-ARGUMENTS...' >&2
 	echo 'Runs curl with the cookies from `ia`'"'s"' config file' >&2
+	echo "MODE must be either cookie or header; in the latter case, the 'Authorization' header is added to *all* requests!" >&2
 	exit 1
 fi
 
+mode="$1"
+shift
+
 # Logic for the config file location is the same as upstream: the first one of $IA_CONFIG_FILE, ${XDG_CONFIG_HOME}/internetarchive/ia.ini, ~/.config/ia.ini, ~/.ia that exists is used.
 if [[ -z "${XDG_CONFIG_HOME}" || "${XDG_CONFIG_HOME}" != /* || ! -d "${XDG_CONFIG_HOME}" ]]
 then
@@ -24,4 +28,10 @@ then
 	exit 1
 fi
 
-exec curl --cookie <(python3 -c 'import configparser, sys; config = configparser.RawConfigParser(); config.read(sys.argv[1]); {print(f".archive.org\tTRUE\t/\tFALSE\t0\t{k}\t{v}") for k, v in config["cookies"].items()}' "${path}") "$@"
+if [[ "${mode}" == 'cookie' ]]
+then
+	exec curl --cookie <(python3 -c 'import configparser, sys; config = configparser.RawConfigParser(); config.read(sys.argv[1]); {print(f".archive.org\tTRUE\t/\tFALSE\t0\t{k}\t{v}") for k, v in config["cookies"].items()}' "${path}") "$@"
+else
+	header="$(python3 -c 'import configparser, sys; config = configparser.RawConfigParser(); config.read(sys.argv[1]); print("LOW " + config["s3"]["access"] + ":" + config["s3"]["secret"])' "${path}")"
+	exec curl --header "Authorization: ${header}" "$@"
+fi