diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
new file mode 100644
index 000000000..f1b4a6f4e
--- /dev/null
+++ b/.github/workflows/mypy.yml
@@ -0,0 +1,29 @@
+name: "mypy check"
+on: [pull_request]
+
+jobs:
+
+  static-type-check:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-python@v3
+      with:
+        python-version: '3.x'
+    - run: pip install mypy
+    - name: Get Python changed files
+      id: changed-py-files
+      uses: tj-actions/changed-files@v23
+      with:
+        files: |
+          *.py
+          **/*.py
+
+    - name: Run if any of the listed files above is changed
+      if: steps.changed-py-files.outputs.any_changed == 'true'
+      run: mypy ${{ steps.changed-py-files.outputs.all_changed_files}} --install-types --non-interactive
+
+    - name: Set warning if previous step failed
+      if: failure()
+      # run: echo "::warning::The previous step failed but we are continuing."
+      run: echo "::warning file=app.py,line=10,col=5::Code formatting issues detected"
diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
new file mode 100644
index 000000000..f3d8d8b5f
--- /dev/null
+++ b/.github/workflows/pre-commit.yml
@@ -0,0 +1,25 @@
+name: pre-commit
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: 3.x
+
+      - name: Fetch repository
+        run: git fetch origin
+
+      - uses: pre-commit/action@v3.0.1
+        with:
+          # extra_args: --from-ref origin/HEAD --to-ref HEAD
+          # extra_args: --from-ref main --to-ref HEAD
+          # extra_args: --from-ref main
+          extra_args: --from-ref origin/main --to-ref HEAD
diff --git a/.mypy.ini b/.mypy.ini
index 976ba0294..f882692d0 100644
--- a/.mypy.ini
+++ b/.mypy.ini
@@ -1,2 +1,3 @@
 [mypy]
 ignore_missing_imports = True
+allow_untyped_globals = True
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 000000000..39fcbf2a2
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,93 @@
+# HOWTO: https://pre-commit.com/#usage
+# pip3 install pre-commit
+# pre-commit install -t pre-commit -t pre-push
+
+repos:
+  # - repo: https://github.com/psf/black
+  #   rev: 23.11.0
+  #   hooks:
+  #     - id: black
+  # - repo: https://github.com/pre-commit/mirrors-prettier
+  #   rev: v3.1.0
+  #   hooks:
+  #     - id: prettier
+  #       exclude: tests_recording/test_data/
+  # - repo: https://github.com/pre-commit/pre-commit-hooks
+  #   rev: v4.5.0
+  #   hooks:
+  #     - id: check-added-large-files
+  #       exclude: tests_recording/test_data/test_api/
+  #     - id: check-ast
+  #     - id: check-builtin-literals
+  #     - id: check-docstring-first
+  #     - id: check-executables-have-shebangs
+  #       exclude: (files/bash-completion/packit|tests/data/)
+  #     - id: check-merge-conflict
+  #     - id: check-symlinks
+  #     - id: check-yaml
+  #     - id: detect-private-key
+  #       exclude: tests/integration/conftest.py
+  #     - id: end-of-file-fixer
+  #       exclude: ^(tests/data/patches|tests/.+\.patch)
+  #     - id: mixed-line-ending
+  #     - id: trailing-whitespace
+  #       exclude: ^(tests/data/patches|tests/.+\.patch)
+  # - repo: https://github.com/astral-sh/ruff-pre-commit
+  #   rev: v0.1.6
+  #   hooks:
+  #     - id: ruff
+  #       args: [--fix, --exit-non-zero-on-fix]
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v1.7.1
+    hooks:
+      - id: mypy
+        args:
+          [
+            --no-strict-optional,
+            --ignore-missing-imports,
+            --explicit-package-bases,
+          ]
+        additional_dependencies:
+          [
+            types-six,
+            types-requests,
+            types-setuptools,
+            types-mock,
+            types-decorator,
+            types-pytz,
+            # types-click,
+            # types-pkg_resources,
+            # types-requests,
+            # types-tabulate,
+            # types-Deprecated,
+            # types-PyYAML,
+            # types-cachetools,
+          ]
+  # - repo: https://github.com/teemtee/tmt.git
+  #   rev: 1.29.0
+  #   hooks:
+  #     - id: tmt-lint
+  # - repo: https://github.com/packit/pre-commit-hooks
+  #   rev: v1.2.0
+  #   hooks:
+  #     - id: validate-config # passes when packit not installed (e.g. in CI)
+  #     - id: check-rebase
+  #       args:
+  #         - https://github.com/packit/packit.git
+  #       stages: [manual, push]
+  # - repo: https://github.com/python-jsonschema/check-jsonschema
+  #   rev: 0.28.0
+  #   hooks:
+  #     - id: check-github-workflows
+  #       args: ["--verbose"]
+  # - repo: https://github.com/Lucas-C/pre-commit-hooks
+  #   rev: v1.5.5
+  #   hooks:
+  #     - id: insert-license
+  #       files: \.py$
+  #       exclude: (tests/data/|tests_recording/test_data/)
+  #       args:
+  #         - --license-filepath
+  #         - LICENSE_HEADER.txt
+  #         - --comment-style
+  #         - "#"
diff --git a/cli/copr_cli/main.py b/cli/copr_cli/main.py
index 1a070a5aa..c071045f2 100644
--- a/cli/copr_cli/main.py
+++ b/cli/copr_cli/main.py
@@ -25,7 +25,7 @@
 try:
     import argcomplete
 except ImportError:
-    argcomplete = None
+    pass
 
 import copr.exceptions as copr_exceptions
 from copr.v3 import (
@@ -62,11 +62,6 @@
     None: "default",
 }
 
-try:
-    input = raw_input
-except NameError:
-    pass
-
 
 class FrontendOutdatedCliException(Exception):
     """
@@ -1900,7 +1895,7 @@ def __call__(self, parser, args, argument, option_string=None):
     # package monitoring
     cli_monitor_parser(subparsers)
 
-    if argcomplete:
+    if "argcomplete" in sys.modules:
         argcomplete.autocomplete(parser)
     return parser
 
diff --git a/frontend/coprs_frontend/coprs/__init__.py b/frontend/coprs_frontend/coprs/__init__.py
index d6b8f5ae4..848567bcb 100644
--- a/frontend/coprs_frontend/coprs/__init__.py
+++ b/frontend/coprs_frontend/coprs/__init__.py
@@ -19,7 +19,7 @@
 from coprs.redis_session import RedisSessionInterface
 from coprs.request import get_request_class
 
-app = flask.Flask(__name__)
+app : flask.Flask = flask.Flask(__name__)
 if "COPRS_ENVIRON_PRODUCTION" in os.environ:
     app.config.from_object("coprs.config.ProductionConfig")
 elif "COPRS_ENVIRON_UNITTEST" in os.environ:
@@ -42,7 +42,7 @@
 session = Session(app)
 
 # Set `future=True` to ensure compatibility between SQLAlchemy 1.x and 2.0
-db = SQLAlchemy(app, engine_options={"future": True})
+db : SQLAlchemy = SQLAlchemy(app, engine_options={"future": True})
 
 @contextmanager
 def db_session_scope():
diff --git a/keygen/run/dev_run.py b/keygen/run/dev_run.py
deleted file mode 100755
index 3f75e4efe..000000000
--- a/keygen/run/dev_run.py
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/usr/bin/python3
-
-import sys
-sys.path.append("../src/")
-
-import os
-import glob
-os.environ["COPR_KEYGEN_CONFIG"] = glob.glob("./run/dev_run.conf")
-
-for d in [
-    "/tmp/copr-keygen/var/lib/copr-keygen/phrases/",
-    "/tmp/copr-keygen/var/lib/copr-keygen/gnupg",
-    "/tmp/copr-keygen/var/log/copr-keygen"
-]:
-    if not os.path.exists(d):
-        os.makedirs(d)
-
-from copr_keygen import app
-
-import logging
-
-logging.basicConfig(
-    level=logging.DEBUG,
-    format= '[%(asctime)s] {%(pathname)s:%(lineno)d} %(levelname)s - %(message)s',
-    datefmt='%H:%M:%S'
-)
-
-if __name__ == '__main__':
-    app.run()
diff --git a/python/copr/v3/auth/base.py b/python/copr/v3/auth/base.py
index 2f3e45480..2b62a0ab1 100644
--- a/python/copr/v3/auth/base.py
+++ b/python/copr/v3/auth/base.py
@@ -11,7 +11,7 @@
 try:
     from urllib.parse import urlparse
 except ImportError:
-    from urlparse import urlparse
+    from urlparse import urlparse  # type: ignore [no-redef]
 
 
 class BaseAuth(object):
diff --git a/python/copr/v3/pagination.py b/python/copr/v3/pagination.py
index a145d8220..9032d45ad 100644
--- a/python/copr/v3/pagination.py
+++ b/python/copr/v3/pagination.py
@@ -5,7 +5,7 @@
 
 try:
     import urlparse
-    from urllib import urlencode
+    from urllib import urlencode  # type: ignore [attr-defined]
 except ImportError:
     import urllib.parse as urlparse
     from urllib.parse import urlencode
diff --git a/rpmbuild/copr_rpmbuild/providers/__init__.py b/rpmbuild/copr_rpmbuild/providers/__init__.py
index 4178bd9c3..9bb294cc4 100644
--- a/rpmbuild/copr_rpmbuild/providers/__init__.py
+++ b/rpmbuild/copr_rpmbuild/providers/__init__.py
@@ -8,10 +8,6 @@
 from .distgit import DistGitProvider
 
 
-__all__ = [RubyGemsProvider, PyPIProvider,
-           UrlProvider, ScmProvider]
-
-
 def factory(source_type):
     try:
         return {
diff --git a/rpmbuild/tests/test_base.py b/rpmbuild/tests/test_base.py
index 5ecbd1e60..a8ca9903e 100644
--- a/rpmbuild/tests/test_base.py
+++ b/rpmbuild/tests/test_base.py
@@ -10,7 +10,7 @@
      builtins = 'builtins'
 except ImportError:
      # Python 2 version depends on mock
-     import mock
+     import mock  # type: ignore [no-redef]
      builtins = '__builtin__'
 
 class TestProvider(TestCase):
diff --git a/rpmbuild/tests/test_distgit.py b/rpmbuild/tests/test_distgit.py
index 08fa6c987..c9d128b5c 100644
--- a/rpmbuild/tests/test_distgit.py
+++ b/rpmbuild/tests/test_distgit.py
@@ -18,7 +18,7 @@
     from unittest import mock
 except ImportError:
     # Python 2 version depends on mock
-    import mock
+    import mock  # type: ignore [no-redef]
 
 from tests import TestCase
 
diff --git a/rpmbuild/tests/test_main.py b/rpmbuild/tests/test_main.py
index 17f2e1d37..9214d23cb 100644
--- a/rpmbuild/tests/test_main.py
+++ b/rpmbuild/tests/test_main.py
@@ -12,7 +12,7 @@
      from unittest import mock
 except ImportError:
      # Python 2 version depends on mock
-     import mock
+     import mock  # type: ignore [no-redef]
 
 
 class TestTmpCleanup(TestCase):
diff --git a/rpmbuild/tests/test_mock.py b/rpmbuild/tests/test_mock.py
index 9b6cc7a98..522d92943 100644
--- a/rpmbuild/tests/test_mock.py
+++ b/rpmbuild/tests/test_mock.py
@@ -14,7 +14,7 @@
      builtins = 'builtins'
 except ImportError:
      # Python 2 version depends on mock
-     import mock
+     import mock  # type: ignore [no-redef]
      builtins = '__builtin__'
 
 @pytest.yield_fixture
diff --git a/rpmbuild/tests/test_pypi.py b/rpmbuild/tests/test_pypi.py
index 34443bfe9..0477d8b72 100644
--- a/rpmbuild/tests/test_pypi.py
+++ b/rpmbuild/tests/test_pypi.py
@@ -6,7 +6,7 @@
      builtins = 'builtins'
 except ImportError:
      # Python 2 version depends on mock
-     import mock
+     import mock  # type: ignore [no-redef]
      builtins = '__builtin__'
 
 
diff --git a/rpmbuild/tests/test_rubygems.py b/rpmbuild/tests/test_rubygems.py
index 495bd2ca6..0f280b410 100644
--- a/rpmbuild/tests/test_rubygems.py
+++ b/rpmbuild/tests/test_rubygems.py
@@ -9,7 +9,7 @@
      builtins = 'builtins'
 except ImportError:
      # Python 2 version depends on mock
-     import mock
+     import mock  # type: ignore [no-redef]
      builtins = '__builtin__'
 
 
diff --git a/rpmbuild/tests/test_scm.py b/rpmbuild/tests/test_scm.py
index 801d42202..15a7c7588 100644
--- a/rpmbuild/tests/test_scm.py
+++ b/rpmbuild/tests/test_scm.py
@@ -13,7 +13,7 @@
      builtins = 'builtins'
 except ImportError:
      # Python 2 version depends on mock
-     import mock
+     import mock  # type: ignore [no-redef]
      builtins = '__builtin__'
 
 RPKG_CONF_JINJA = """
diff --git a/rpmbuild/tests/test_spec.py b/rpmbuild/tests/test_spec.py
index e74983700..cb6269c96 100644
--- a/rpmbuild/tests/test_spec.py
+++ b/rpmbuild/tests/test_spec.py
@@ -23,7 +23,7 @@ def example_com_match(url, request):
      builtins = 'builtins'
 except ImportError:
      # Python 2 version depends on mock
-     import mock
+     import mock  # type: ignore [no-redef]
      builtins = '__builtin__'