diff --git a/.github/workflows/version.yml b/.github/workflows/version.yml
new file mode 100644
index 000000000..ddce2cd9a
--- /dev/null
+++ b/.github/workflows/version.yml
@@ -0,0 +1,48 @@
+#
+#  Copyright (c) 2020, The OpenThread Authors.
+#  All rights reserved.
+#
+#  Redistribution and use in source and binary forms, with or without
+#  modification, are permitted provided that the following conditions are met:
+#  1. Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+#  2. Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#  3. Neither the name of the copyright holder nor the
+#     names of its contributors may be used to endorse or promote products
+#     derived from this software without specific prior written permission.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+#  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+#  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+#  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+#  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+#  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+#  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+#  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+#  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+#  POSSIBILITY OF SUCH DAMAGE.
+#
+
+name: Build
+
+on: [pull_request]
+
+jobs:
+  cancel-previous-runs:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: rokroskar/workflow-run-cleanup-action@master
+      env:
+        GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+      if: "github.ref != 'refs/heads/master'"
+
+  api-version:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+    - name: Check
+      run: |
+        script/check-api-version
diff --git a/script/check-api-version b/script/check-api-version
new file mode 100755
index 000000000..351d14455
--- /dev/null
+++ b/script/check-api-version
@@ -0,0 +1,73 @@
+#!/bin/bash
+#
+#  Copyright (c) 2020, The OpenThread Authors.
+#  All rights reserved.
+#
+#  Redistribution and use in source and binary forms, with or without
+#  modification, are permitted provided that the following conditions are met:
+#  1. Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+#  2. Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#  3. Neither the name of the copyright holder nor the
+#     names of its contributors may be used to endorse or promote products
+#     derived from this software without specific prior written permission.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+#  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+#  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+#  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+#  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+#  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+#  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+#  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+#  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+#  POSSIBILITY OF SUCH DAMAGE.
+#
+
+set -euo pipefail
+
+readonly OT_SHA_OLD="$(git cat-file -p HEAD | grep 'parent ' | head -n1 | cut -d' ' -f2)"
+readonly OT_VERSIONS_FILE=tmp/api_versions
+
+die()
+{
+    echo >&2 "ERROR: $*"
+    exit 1
+}
+
+main()
+{
+    mkdir -p tmp
+
+    echo "The master branch must be ${OT_SHA_OLD}"
+
+    git fetch --depth 1 origin "${OT_SHA_OLD}"
+
+    if git diff --quiet "${OT_SHA_OLD}" -- include; then
+        echo 'No OpenThread public APIs updates.'
+        exit 0
+    fi
+
+    git diff "${OT_SHA_OLD}" -- include | tee >(cat >&2) | grep -aP '[-+]#define OPENTHREAD_API_VERSION (.+)' >"${OT_VERSIONS_FILE}" || die 'Version number is not updated!'
+
+    [[ $(wc -l <"${OT_VERSIONS_FILE}") == 2 ]] || die 'Multiple OPENTHREAD_API_VERSION definitions found!'
+
+    old_version=$(grep -aoP '(?<=-#define OPENTHREAD_API_VERSION ).+' "${OT_VERSIONS_FILE}") || die 'Failed to find old version!'
+    new_version=$(grep -aoP '(?<=\+#define OPENTHREAD_API_VERSION ).+' "${OT_VERSIONS_FILE}") || die 'Failed to find new version!'
+
+    echo -e '\n--------------------------\n'
+
+    echo "Old version: ${old_version}"
+    echo "New version: ${new_version}"
+
+    [[ $((new_version - old_version)) -gt 0 ]] || die 'Version is not increased!'
+
+    echo -e '\n--------------------------\n'
+
+    echo 'PASS: version check.'
+}
+
+main "$@"