diff --git a/add_data_to_graph.sh b/add_data_to_graph.sh
index 592a6d0..705f979 100755
--- a/add_data_to_graph.sh
+++ b/add_data_to_graph.sh
@@ -3,10 +3,11 @@
 # ARG_HELP([Upload JSONLD and Turtle data to a Neurobagel graph])
 # ARG_POSITIONAL_SINGLE([dir],[Path to directory containing .jsonld and/or .ttl files. ALL .jsonld and .ttl files in this directory will be uploaded.])
 # ARG_POSITIONAL_SINGLE([graph-url],[Host and port at which to access the graph database to add data to (e.g., localhost:7200)])
-# ARG_POSITIONAL_SINGLE([graph-db],[Name of graph database to add data to])
+# ARG_POSITIONAL_SINGLE([graph-database],[Name of graph database to add data to])
 # ARG_POSITIONAL_SINGLE([user],[Username for graph database access])
 # ARG_POSITIONAL_SINGLE([password],[Password for graph database user])
 # ARG_OPTIONAL_BOOLEAN([clear-data],[],[Whether or not to first clear all existing data from the graph database],[off])
+# ARG_OPTIONAL_BOOLEAN([use-graphdb-syntax],[],[Whether or not to use GraphDB API endpoints to update the specified graph database. If off, assumes the graph database is a Stardog database.],[off])
 # ARGBASH_GO()
 # needed because of Argbash --> m4_ignore([
 ### START OF CODE GENERATED BY Argbash v2.9.0 one line above ###
@@ -35,19 +36,21 @@ begins_with_short_option()
 _positionals=()
 # THE DEFAULTS INITIALIZATION - OPTIONALS
 _arg_clear_data="off"
+_arg_use_graphdb_syntax="off"
 
 
 print_help()
 {
 	printf '%s\n' "Upload JSONLD and Turtle data to a Neurobagel graph"
-	printf 'Usage: %s [-h|--help] [--(no-)clear-data] <dir> <graph-url> <graph-db> <user> <password>\n' "$0"
+	printf 'Usage: %s [-h|--help] [--(no-)clear-data] [--(no-)use-graphdb-syntax] <dir> <graph-url> <graph-database> <user> <password>\n' "$0"
 	printf '\t%s\n' "<dir>: Path to directory containing .jsonld and/or .ttl files. ALL .jsonld and .ttl files in this directory will be uploaded."
 	printf '\t%s\n' "<graph-url>: Host and port at which to access the graph database to add data to (e.g., localhost:7200)"
-	printf '\t%s\n' "<graph-db>: Name of graph database to add data to"
+	printf '\t%s\n' "<graph-database>: Name of graph database to add data to"
 	printf '\t%s\n' "<user>: Username for graph database access"
 	printf '\t%s\n' "<password>: Password for graph database user"
 	printf '\t%s\n' "-h, --help: Prints help"
 	printf '\t%s\n' "--clear-data, --no-clear-data: Whether or not to first clear all existing data from the graph database (off by default)"
+	printf '\t%s\n' "--use-graphdb-syntax, --no-use-graphdb-syntax: Whether or not to use GraphDB API endpoints to update the specified graph database. If off, assumes the graph database is a Stardog database. (off by default)"
 }
 
 
@@ -70,6 +73,10 @@ parse_commandline()
 				_arg_clear_data="on"
 				test "${1:0:5}" = "--no-" && _arg_clear_data="off"
 				;;
+			--no-use-graphdb-syntax|--use-graphdb-syntax)
+				_arg_use_graphdb_syntax="on"
+				test "${1:0:5}" = "--no-" && _arg_use_graphdb_syntax="off"
+				;;
 			*)
 				_last_positional="$1"
 				_positionals+=("$_last_positional")
@@ -83,7 +90,7 @@ parse_commandline()
 
 handle_passed_args_count()
 {
-	local _required_args_string="'dir', 'graph-url', 'graph-db', 'user' and 'password'"
+	local _required_args_string="'dir', 'graph-url', 'graph-database', 'user' and 'password'"
 	test "${_positionals_count}" -ge 5 || _PRINT_HELP=yes die "FATAL ERROR: Not enough positional arguments - we require exactly 5 (namely: $_required_args_string), but got only ${_positionals_count}." 1
 	test "${_positionals_count}" -le 5 || _PRINT_HELP=yes die "FATAL ERROR: There were spurious positional arguments --- we expect exactly 5 (namely: $_required_args_string), but got ${_positionals_count} (the last one was: '${_last_positional}')." 1
 }
@@ -92,7 +99,7 @@ handle_passed_args_count()
 assign_positional_args()
 {
 	local _positional_name _shift_for=$1
-	_positional_names="_arg_dir _arg_graph_url _arg_graph_db _arg_user _arg_password "
+	_positional_names="_arg_dir _arg_graph_url _arg_graph_database _arg_user _arg_password "
 
 	shift "$_shift_for"
 	for _positional_name in ${_positional_names}
@@ -116,9 +123,10 @@ assign_positional_args 1 "${_positionals[@]}"
 jsonld_dir=$_arg_dir
 user=$_arg_user
 password=$_arg_password
-graph_db=$_arg_graph_db
+graph_db=$_arg_graph_database
 graph_url=$_arg_graph_url
 clear_data=$_arg_clear_data  # value is either on or off (https://argbash.readthedocs.io/en/stable/guide.html#optional-arguments)
+use_graphdb_syntax=$_arg_use_graphdb_syntax
 
 DELETE_TRIPLES_QUERY="
 DELETE { 
@@ -127,34 +135,81 @@ DELETE {
 	?s ?p ?o .
 }"
 
+# Depending on the graph backend used, set URLs for uploading data to and clearing data in graph database
+base_url="http://${graph_url}/${graph_db}"
+if [ "$use_graphdb_syntax" = "on" ]; then
+	upload_data_url="${base_url}/statements"
+	clear_data_url=$upload_data_url
+else
+	upload_data_url=$base_url
+	clear_data_url="${base_url}/update"
+fi
+
 
 # Clear existing data in graph database if requested
 if [ "$clear_data" = "on" ]; then
-	echo -e "\nClearing existing data from ${graph_db}..."
+	echo -e "\nCLEARING EXISTING DATA FROM ${graph_db}..."
 
-	curl -u "${user}:${password}" -X POST http://${graph_url}/${graph_db}/update \
+	response=$(curl -u "${user}:${password}" --no-progress-meter -i -w "\n%{http_code}\n" \
+		-X POST $clear_data_url \
 		-H "Content-Type: application/sparql-update" \
-		--data-binary "${DELETE_TRIPLES_QUERY}"
-
-	echo -e "Done clearing existing data from ${graph_db}.\n"
+		--data-binary "${DELETE_TRIPLES_QUERY}")
+
+	# Extract and check status code outputted as final line of response
+	httpcode=$(tail -n1 <<< "$response")
+	if (( $httpcode < 200 || $httpcode >= 300 )); then
+		echo -e "\nERROR: Failed to clear ${graph_db}:"
+		echo "$(sed '$d' <<< "$response")"
+		echo -e "\nEXITING..."
+		exit 1
+	fi
 fi
 
 
 # Add data to specified graph database
-echo "Uploading data from ${jsonld_dir} to ${graph_db}..."
+echo -e "\nUPLOADING DATA FROM ${jsonld_dir} TO ${graph_db}...\n"
+
+upload_failed=()
 
 for db in ${jsonld_dir}/*.jsonld; do
-	curl -u "${user}:${password}" -i -X POST http://${graph_url}/${graph_db} \
-	-H "Content-Type: application/ld+json" \
-	--data-binary @${db}
+	# Prevent edge case where no matching files are present in directory and so loop executes once with glob pattern string itself
+	[ -e "$db" ] || continue
+
+	echo "$(basename ${db}):"
+	response=$(curl -u "${user}:${password}" --no-progress-meter -i -w "\n%{http_code}\n" \
+				-X POST $upload_data_url \
+				-H "Content-Type: application/ld+json" \
+				--data-binary @${db})
+
+	httpcode=$(tail -n1 <<< "$response")
+	if (( $httpcode < 200 || $httpcode >= 300 )); then
+		upload_failed+=("${db}")
+	fi
+	# Print rest of response to stdout
+	echo -e "$(sed '$d' <<< "$response")\n"
 done
 
 for file in ${jsonld_dir}/*.ttl; do
-	curl -u "${user}:${password}" -i -X POST http://${graph_url}/${graph_db} \
-	-H "Content-Type: text/turtle" \
-	--data-binary @${file}
+	[ -e "$file" ] || continue
+
+	echo "$(basename ${file}):"
+	response=$(curl -u "${user}:${password}" --no-progress-meter -i -w "\n%{http_code}\n" \
+				-X POST $upload_data_url \
+				-H "Content-Type: text/turtle" \
+				--data-binary @${file})
+
+	httpcode=$(tail -n1 <<< "$response")
+	if (( $httpcode < 200 || $httpcode >= 300 )); then
+		upload_failed+=("${file}")
+	fi
+	echo -e "$(sed '$d' <<< "$response")\n"
 done
 
-echo "Finished uploading data from ${jsonld_dir} to ${graph_db}"
+echo "FINISHED UPLOADING DATA FROM ${jsonld_dir} TO ${graph_db}."
+
+if (( ${#upload_failed[@]} != 0 )); then
+	echo -e "\nERROR: Upload failed for these files:"
+	printf '%s\n' "${upload_failed[@]}"
+fi
 
 # ] <-- needed because of Argbash