diff --git a/pubs/commands/__init__.py b/pubs/commands/__init__.py
index 150dae5..cd17fa3 100644
--- a/pubs/commands/__init__.py
+++ b/pubs/commands/__init__.py
@@ -15,5 +15,6 @@ from . import export_cmd
 from . import import_cmd
 # bonus
 from . import websearch_cmd
+from . import url_cmd
 
 from . import edit_cmd
diff --git a/pubs/commands/url_cmd.py b/pubs/commands/url_cmd.py
new file mode 100644
index 0000000..7ac7b7f
--- /dev/null
+++ b/pubs/commands/url_cmd.py
@@ -0,0 +1,35 @@
+from __future__ import unicode_literals
+
+import webbrowser
+
+from .. import repo
+from ..uis import get_ui
+from ..utils import resolve_citekey_list
+
+
+
+def parser(subparsers, conf):
+    parser = subparsers.add_parser('url',
+                                   help="open a paper's url in the default web browser")
+    parser.add_argument("citekey", nargs = '*',
+                        help="one or more citeKeys to open")
+    return parser
+
+
+def command(conf, args):
+    """Open the url of one or several papers in a web browser."""
+
+    ui = get_ui()
+    rp = repo.Repository(conf)
+
+    for key in resolve_citekey_list(rp, args.citekey, ui=ui, exit_on_fail=False):
+        try:
+            paper = rp.pull_paper(key)
+            url = paper.bibdata['url']
+            ui.info('opening url {}'.format(url))
+            webbrowser.open(url)
+
+        except KeyError as e:
+            ui.warning('{} has no url'.format(key))
+
+    rp.close()
diff --git a/pubs/pubs_cmd.py b/pubs/pubs_cmd.py
index 8955cfb..949fd4a 100644
--- a/pubs/pubs_cmd.py
+++ b/pubs/pubs_cmd.py
@@ -29,6 +29,7 @@ CORE_CMDS = collections.OrderedDict([
     ('import', commands.import_cmd),
 
     ('websearch', commands.websearch_cmd),
+    ('url', commands.url_cmd),
     ('edit', commands.edit_cmd),
 ])
 
diff --git a/tests/requirements.txt b/tests/requirements.txt
index c3ee05b..2790d94 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -2,3 +2,4 @@
 six
 pyfakefs==3.3
 ddt
+mock
diff --git a/tests/test_usecase.py b/tests/test_usecase.py
index 7d98492..8091f69 100644
--- a/tests/test_usecase.py
+++ b/tests/test_usecase.py
@@ -6,6 +6,7 @@ import os
 import re
 import sys
 import shutil
+import mock
 
 import six
 import ddt
@@ -23,7 +24,6 @@ import fixtures
 
 from pubs.commands import init_cmd, import_cmd
 
-
 # makes the tests very noisy
 PRINT_OUTPUT   = False
 CAPTURE_OUTPUT = True
@@ -104,13 +104,14 @@ class CommandTestCase(fake_env.TestFakeFs):
                 actual_cmd = cmd
                 if not isinstance(cmd, p3.ustr):
                     actual_cmd = cmd[0]
-                    if len(cmd) == 2:  # Inputs provided
+                    if len(cmd) >= 2 and cmd[1] is not None:  # Inputs provided
                         inputs = cmd[1]
-                    if len(cmd) == 3:  # Expected output provided
+                    if len(cmd) >= 3:  # Expected output provided
                         capture_output = True
-                        expected_out = color.undye(cmd[2])
-                    if len(cmd) == 4:  # Expected error output provided
-                        expected_err = color.undye(cmd[3])
+                        if cmd[2] is not None:
+                            expected_out = color.undye(cmd[2])
+                    if len(cmd) >= 4 and cmd[3] is not None:  # Expected error output provided
+                            expected_err = color.undye(cmd[3])
                 # Always set fake input: test should not ask unexpected user input
                 input = fake_env.FakeInput(inputs, [content, uis, p3])
                 input.as_global()
@@ -497,6 +498,43 @@ class TestTag(DataCommandTestCase):
         with self.assertRaises(FakeSystemExit):
             self.execute_cmds(cmds)
 
+class TestURL(DataCommandTestCase):
+
+    def setUp(self):
+        super(TestURL, self).setUp()
+        init = ['pubs init',
+                'pubs add data/pagerank.bib',
+                'pubs add data/turing1950.bib',
+                'pubs add data/martius.bib',
+                ]
+        self.execute_cmds(init)
+
+    @mock.patch('webbrowser.open')
+    def test_url_open_one(self, wb_open):
+        cmds = ['pubs url Page99',
+                ]
+        correct = ['info: opening url http://ilpubs.stanford.edu:8090/422/\n',
+                   ]
+        out = self.execute_cmds(cmds)
+        self.assertEqual(out, correct)
+
+    @mock.patch('webbrowser.open')
+    def test_url_open_missing(self, wb_open):
+        cmds = [('pubs url turing1950computing', None, None, 'warning: turing1950computing has no url\n'),
+                ]
+        self.execute_cmds(cmds)
+
+    @mock.patch('webbrowser.open')
+    def test_url_open_multiple(self, wb_open):
+        cmds = ['pubs url Page99 10.1371_journal.pone.0063400',
+                ]
+        correct = ['info: opening url http://ilpubs.stanford.edu:8090/422/\n' +
+                   'info: opening url http://dx.doi.org/10.1371%2Fjournal.pone.0063400\n',
+                   ]
+        out = self.execute_cmds(cmds)
+        self.assertEqual(out, correct)
+
+
 
 class TestNote(DataCommandTestCase):