diff --git a/swh/web/ui/converters.py b/swh/web/ui/converters.py
--- a/swh/web/ui/converters.py
+++ b/swh/web/ui/converters.py
@@ -165,6 +165,7 @@
     return from_swh(revision,
                     hashess=set(['id', 'directory', 'parents', 'children']),
                     bytess=set(['name',
+                                'fullname',
                                 'email',
                                 'message']),
                     dates={'date', 'committer_date'})
diff --git a/swh/web/ui/service.py b/swh/web/ui/service.py
--- a/swh/web/ui/service.py
+++ b/swh/web/ui/service.py
@@ -216,6 +216,37 @@
         'Only sha1_git is supported.')
 
     res = backend.revision_get(sha1_git_bin)
+    res.pop('message', None)
+    return converters.from_revision(res)
+
+
+def lookup_revision_message(rev_sha1_git):
+    """Return the raw message of the revision with sha1 revision_sha1_git.
+
+    Args:
+        revision_sha1_git: The revision's sha1 as hexadecimal
+
+    Returns:
+        Decoded revision message as dict {'message': <the_message>}
+
+    Raises:
+        ValueError if the identifier provided is not of sha1 nature.
+        NotFoundExc if the revision is not found, or if it has no message
+
+    """
+    _, sha1_git_bin = query.parse_hash_with_algorithms_or_throws(
+        rev_sha1_git,
+        ['sha1'],
+        'Only sha1_git is supported.')
+
+    revision = backend.revision_get(sha1_git_bin)
+    if not revision:
+        raise NotFoundExc('Revision with sha1_git %s not found.'
+                          % rev_sha1_git)
+    if 'message' not in revision:
+        raise NotFoundExc('No message for revision with sha1_git %s.'
+                          % rev_sha1_git)
+    res = {'message': revision['message']}
     return converters.from_revision(res)
 
 
diff --git a/swh/web/ui/tests/test_service.py b/swh/web/ui/tests/test_service.py
--- a/swh/web/ui/tests/test_service.py
+++ b/swh/web/ui/tests/test_service.py
@@ -929,7 +929,6 @@
                 'name': 'boule & bill',
                 'email': 'boule@bill.org',
             },
-            'message': 'elegant fix for bug 31415957',
             'date': "2000-01-17T11:23:54+00:00",
             'committer_date': "2000-01-17T11:23:54+00:00",
             'synthetic': False,
@@ -943,6 +942,122 @@
 
     @patch('swh.web.ui.service.backend')
     @istest
+    def lookup_revision_msg_ok(self, mock_backend):
+        # given
+        mock_backend.revision_get.return_value = {
+            'id': hex_to_hash('18d8be353ed3480476f032475e7c233eff7371d5'),
+            'directory': hex_to_hash(
+                '7834ef7e7c357ce2af928115c6c6a42b7e2a44e6'),
+            'author': {
+                'name': b'bill & boule',
+                'email': b'bill@boule.org',
+            },
+            'committer': {
+                'name': b'boule & bill',
+                'email': b'boule@bill.org',
+            },
+            'message': b'elegant fix for bug 31415957',
+            'date': {
+                'timestamp': datetime.datetime(
+                    2000, 1, 17, 11, 23, 54,
+                    tzinfo=datetime.timezone.utc,
+                ).timestamp(),
+                'offset': 0,
+                'negative_utc': False,
+            },
+            'committer_date': {
+                'timestamp': datetime.datetime(
+                    2000, 1, 17, 11, 23, 54,
+                    tzinfo=datetime.timezone.utc,
+                ).timestamp(),
+                'offset': 0,
+                'negative_utc': False,
+            },
+            'synthetic': False,
+            'type': 'git',
+            'parents': [],
+            'metadata': [],
+        }
+
+        # when
+        rv = service.lookup_revision_message(
+            '18d8be353ed3480476f032475e7c233eff7371d5')
+
+        # then
+        self.assertEquals(rv, {'message': 'elegant fix for bug 31415957'})
+        mock_backend.revision_get.assert_called_with(
+            hex_to_hash('18d8be353ed3480476f032475e7c233eff7371d5'))
+
+    @patch('swh.web.ui.service.backend')
+    @istest
+    def lookup_revision_msg_absent(self, mock_backend):
+        # given
+        mock_backend.revision_get.return_value = {
+            'id': hex_to_hash('18d8be353ed3480476f032475e7c233eff7371d5'),
+            'directory': hex_to_hash(
+                '7834ef7e7c357ce2af928115c6c6a42b7e2a44e6'),
+            'author': {
+                'name': b'bill & boule',
+                'email': b'bill@boule.org',
+            },
+            'committer': {
+                'name': b'boule & bill',
+                'email': b'boule@bill.org',
+            },
+            'date': {
+                'timestamp': datetime.datetime(
+                    2000, 1, 17, 11, 23, 54,
+                    tzinfo=datetime.timezone.utc,
+                ).timestamp(),
+                'offset': 0,
+                'negative_utc': False,
+            },
+            'committer_date': {
+                'timestamp': datetime.datetime(
+                    2000, 1, 17, 11, 23, 54,
+                    tzinfo=datetime.timezone.utc,
+                ).timestamp(),
+                'offset': 0,
+                'negative_utc': False,
+            },
+            'synthetic': False,
+            'type': 'git',
+            'parents': [],
+            'metadata': [],
+        }
+
+        # when
+        with self.assertRaises(NotFoundExc) as cm:
+            service.lookup_revision_message(
+                '18d8be353ed3480476f032475e7c233eff7371d5')
+
+            # then
+            mock_backend.revision_get.assert_called_with(
+                hex_to_hash('18d8be353ed3480476f032475e7c233eff7371d5'))
+            self.assertEqual(cm.exception.args[0], 'No message for revision '
+                             'with sha1_git '
+                             '18d8be353ed3480476f032475e7c233eff7371d5.')
+
+    @patch('swh.web.ui.service.backend')
+    @istest
+    def lookup_revision_msg_norev(self, mock_backend):
+        # given
+        mock_backend.revision_get.return_value = None
+
+        # when
+        with self.assertRaises(NotFoundExc) as cm:
+            service.lookup_revision_message(
+                '18d8be353ed3480476f032475e7c233eff7371d5')
+
+            # then
+            mock_backend.revision_get.assert_called_with(
+                hex_to_hash('18d8be353ed3480476f032475e7c233eff7371d5'))
+            self.assertEqual(cm.exception.args[0], 'Revision with sha1_git '
+                             '18d8be353ed3480476f032475e7c233eff7371d5 '
+                             'not found.')
+
+    @patch('swh.web.ui.service.backend')
+    @istest
     def lookup_revision_log(self, mock_backend):
         # given
         stub_revision_log = [{
diff --git a/swh/web/ui/tests/views/test_api.py b/swh/web/ui/tests/views/test_api.py
--- a/swh/web/ui/tests/views/test_api.py
+++ b/swh/web/ui/tests/views/test_api.py
@@ -716,6 +716,74 @@
 
     @patch('swh.web.ui.views.api.service')
     @istest
+    def api_revision_raw_ok(self, mock_service):
+        # given
+        stub_revision = {'message': 'synthetic revision message'}
+
+        mock_service.lookup_revision_message.return_value = stub_revision
+
+        # when
+        rv = self.app.get('/api/1/revision/'
+                          '18d8be353ed3480476f032475e7c233eff7371d5/raw/')
+
+        # then
+        self.assertEquals(rv.status_code, 200)
+        self.assertEquals(rv.mimetype, 'application/json')
+
+        response_data = json.loads(rv.data.decode('utf-8'))
+        self.assertEquals(response_data,
+                          {'message': 'synthetic revision message'})
+
+        mock_service.lookup_revision_message.assert_called_once_with(
+            '18d8be353ed3480476f032475e7c233eff7371d5')
+
+    @patch('swh.web.ui.views.api.service')
+    @istest
+    def api_revision_raw_ok_no_msg(self, mock_service):
+        # given
+        mock_service.lookup_revision_message.side_effect = NotFoundExc(
+            'No message for revision')
+
+        # when
+        rv = self.app.get('/api/1/revision/'
+                          '18d8be353ed3480476f032475e7c233eff7371d5/raw/')
+
+        # then
+        self.assertEquals(rv.status_code, 404)
+        self.assertEquals(rv.mimetype, 'application/json')
+
+        response_data = json.loads(rv.data.decode('utf-8'))
+        self.assertEquals(response_data, {
+            'error': 'No message for revision'})
+
+        self.assertEquals
+        mock_service.lookup_revision_message.assert_called_once_with(
+            '18d8be353ed3480476f032475e7c233eff7371d5')
+
+    @patch('swh.web.ui.views.api.service')
+    @istest
+    def api_revision_raw_ko_no_rev(self, mock_service):
+        # given
+        mock_service.lookup_revision_message.side_effect = NotFoundExc(
+            'No revision found')
+
+        # when
+        rv = self.app.get('/api/1/revision/'
+                          '18d8be353ed3480476f032475e7c233eff7371d5/raw/')
+
+        # then
+        self.assertEquals(rv.status_code, 404)
+        self.assertEquals(rv.mimetype, 'application/json')
+
+        response_data = json.loads(rv.data.decode('utf-8'))
+        self.assertEquals(response_data, {
+            'error': 'No revision found'})
+
+        mock_service.lookup_revision_message.assert_called_once_with(
+            '18d8be353ed3480476f032475e7c233eff7371d5')
+
+    @patch('swh.web.ui.views.api.service')
+    @istest
     def api_revision_with_origin_not_found(self, mock_service):
         mock_service.lookup_revision_by.return_value = None
 
diff --git a/swh/web/ui/views/api.py b/swh/web/ui/views/api.py
--- a/swh/web/ui/views/api.py
+++ b/swh/web/ui/views/api.py
@@ -492,6 +492,30 @@
         enrich_fn=utils.enrich_revision)
 
 
+@app.route('/api/1/revision/<string:sha1_git>/raw/')
+def api_revision_raw_message(sha1_git):
+    """Return the raw data of the revision's message
+
+    Args:
+        sha1_git: the revision's hash
+
+    Returns:
+        The raw revision message, possibly in an illegible
+        format for humans, decoded in utf-8 by default.
+
+    Raises:
+        BadInputExc in case of unknown algo_hash or bad hash.
+        NotFoundExc if the revision is not found or the revision has no
+        message
+
+    Example:
+        GET /api/1/revision/baf18f9fc50a0b6fef50460a76c33b2ddc57486e/raw/
+
+    """
+
+    return service.lookup_revision_message(sha1_git)
+
+
 @app.route('/api/1/revision/<string:sha1_git>/directory/')
 @app.route('/api/1/revision/<string:sha1_git>/directory/<path:dir_path>/')
 def api_revision_directory(sha1_git,