diff --git a/27-01-2021-grepString/grepgFeedService.sh b/27-01-2021-grepString/grepgFeedService.sh
new file mode 100644
index 0000000..0ed0eb3
--- /dev/null
+++ b/27-01-2021-grepString/grepgFeedService.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+out=`find . -name '*.java' -exec grep 'gfeed.d4science.org' /dev/null {} + || echo 'empty'`
+if [[ ["${out}" != "empty"] && "$(grep '\.java' <<< ${out})" ]]; then
+    echo "gFeed endpoint found in "
+    echo "${out}"
+else
+    echo "gFeed endpoint not found"
+fi