new file mode 100644
--- /dev/null
+++ b/tools/lint/flake8.lint
@@ -0,0 +1,62 @@
+# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import json
+import os
+import subprocess
+from collections import defaultdict
+
+from mozlint import result
+
+
+FLAKE8_NOT_FOUND = """
+Could not find flake8! Install flake8 and try again.
+""".strip()
+
+
+def lint(files, **lintargs):
+    import which
+
+    binary = os.environ.get('FLAKE8')
+    if not binary:
+        try:
+            binary = which.which('flake8')
+        except which.WhichError:
+            pass
+
+    if not binary:
+        print(FLAKE8_NOT_FOUND)
+        return 1
+
+    cmdargs = [
+        binary,
+        '--format',
+        '{"path":"%(path)s","lineno":%(row)s,"column":%(col)s,"rule":"%(code)s","message":"%(text)s"}',
+    ] + files
+
+    proc = subprocess.Popen(cmdargs, stdout=subprocess.PIPE, env=os.environ)
+    output = proc.communicate()[0]
+
+    if not output:
+        return []
+
+    results = []
+    for line in output.splitlines():
+        res = json.loads(line)
+        if 'code' in res and res['code'].startswith('W'):
+            res['level'] = 'warning'
+        results.append(result.from_linter(LINTER, **res))
+
+    return results
+
+
+LINTER = {
+    'name': "flake8",
+    'description': "Python linter",
+    'include': ['**/*.py'],
+    'type': 'external',
+    'payload': lint,
+}