diff --git a/centos-mirror-tools/mirror-check.sh b/centos-mirror-tools/mirror-check.sh
new file mode 100755
index 00000000..6a8c4776
--- /dev/null
+++ b/centos-mirror-tools/mirror-check.sh
@@ -0,0 +1,147 @@
+#!/bin/bash
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+# This script checks if the required packages in the .lst file list is
+# actually downloadable. Sometimes, the release number in upstream is
+# changed and that causes a mismatch in the build requirements.
+# We can find this problems in an early stage without the need to
+# download all the packages.
+#
+# The yum cache contains this information, more specific the primary_db
+# files, so iterating over the content of .lst, parse the name of the
+# package and get the information on what is available to download
+# should be enough to know the status of the mirror.
+#
+# If a package is not found then the script will try to get the avai-
+# lable version and log that into the error log. By this way we get
+# notified on what changed in the external repositories.
+#
+# How to run:
+# This script is intended to be run inside the downloader container.
+# It needs that all the CentOS repositories are well setup.
+#
+# ./mirror-check.sh
+#
+# And you should see the checking in progress.
+
+_print_msg() { echo -en "$(date -u +"%Y-%m-%d %H-%M-%S") ==> $1"; }
+info() { _print_msg "INFO: $1\n"; }
+info_c() { _print_msg "INFO: $1"; }
+warning() { _print_msg "WARN: $1\n"; }
+error() { _print_msg "ERROR: $1\n"; }
+
+RPMS_CENTOS_LIST="rpms_centos.lst"
+RPMS_3RD_PARTY_LIST="rpms_centos3rdparties.lst"
+ERROR_LOG_FILE="mirror-check-failures.log"
+truncate -s 0 $ERROR_LOG_FILE
+retcode=0
+extra_opts=""
+
+usage() {
+    echo "$0 [-c <yum.conf>]"
+    echo ""
+    echo "Options:"
+    echo "  -c: Use an alternate yum.conf rather than the system file (option passed"
+    echo "      on to subscripts when appropriate)"
+    echo ""
+}
+
+get_rpm_name() {
+    _rpm_file_name=$1
+    rpm_name=$(echo "$_rpm_file_name" | rev | cut -d'-' -f3- | rev)
+    echo "$rpm_name"
+}
+
+get_rpm_full_name() {
+    _rpm_file_name=$1
+    rpm_name=$(echo "$_rpm_file_name" | rev | cut -d'.' -f2- | rev)
+    echo "$rpm_name"
+}
+
+get_rpm_arch() {
+    arch=$(echo "$1" | rev | cut -d'.' -f2 | rev)
+    echo "$arch"
+}
+
+get_repoquery_info() {
+    _arch=$1
+    _package_name=$2
+    if [ "$_arch" == "x86_64" ]; then
+        # To filter out the i686 packages
+        repoquery_opts="--archlist=x86_64"
+    elif [ "$_arch" == "src" ]; then
+        repoquery_opts="--archlist=src"
+    else
+        repoquery_opts=
+    fi
+    repoquery $extra_opts -C --qf '%{NAME}-%{VERSION}-%{RELEASE}.%{ARCH}' \
+              $repoquery_opts "$_package_name"
+}
+
+_check_rpms() {
+    p=$1
+    full_name=$(get_rpm_full_name "$p")
+    rpm_name=$(get_rpm_name "$p")
+    arch=$(get_rpm_arch "$p")
+    info_c "Checking $full_name... "
+    _repoquery=$(get_repoquery_info "$arch" "$full_name")
+    if [ -z "$_repoquery" ]; then
+        echo -e "FAILED!"
+        available_pkgs=$(get_repoquery_info "$arch" "$rpm_name")
+        echo -e "Package $full_name not found, available $available_pkgs" >> $ERROR_LOG_FILE
+        retcode=1
+    else
+        if [ "$full_name" == "$_repoquery" ]; then
+            echo -e "OK"
+        else
+            echo -e "FAILED!"
+            retcode=1
+            echo -e "Required $full_name but found $_repoquery" >> $ERROR_LOG_FILE
+        fi
+    fi
+}
+
+check_rpms() {
+    _rpms_list=$1
+    for p in $_rpms_list; do
+        _check_rpms "$p"
+    done
+}
+
+while getopts "c:" opt; do
+    case $opt in
+        c)
+            extra_opts="-c ${OPTARG}"
+            ;;
+        \?)
+            echo "Invalid option: -$OPTARG" >&2
+            usage
+            exit 1
+            ;;
+    esac
+done
+
+info "Getting yum cache"
+if ! yum $extra_opts makecache; then
+    error "There was a problem getting yum cache"
+    exit 1
+fi
+
+for rpm_list in "$RPMS_CENTOS_LIST" "$RPMS_3RD_PARTY_LIST"; do
+    info "Reading $rpm_list..."
+    for arch in "src" "noarch" "x86_64"; do
+        info "Getting info for $arch packages..."
+        rpms=$(echo "$(grep -F "$arch.rpm" < $rpm_list)")
+        check_rpms "$rpms"
+    done
+done
+
+if [ $retcode -ne 0 ]; then
+    error "Failures found, error log:"
+    error "=========================="
+    cat $ERROR_LOG_FILE
+fi
+
+exit $retcode