diff --git a/debian/changelog b/debian/changelog
index c88bce0..de6f16a 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -22,7 +22,10 @@ ubuntu-dev-tools (0.137) UNRELEASED; urgency=low
     - Do the report boiler-plate checking in a script that wraps an editor, so
       that we only edit the report once, after checking for duplicates.
     - rm the tmpdir with a little more force (shutil.rmtree) (LP: #899399)
-  * New Tool: ubuntu-upload-permission: Query upload permissions (LP: #876554)
+  * New Tools: (LP: #876554)
+    - ubuntu-upload-permission: Query upload permissions.
+    - ubuntu-is-seeded: Query a package's seed status. Whether it is on
+      current daily images and/or part of the supported seed.
 
   [ Andreas Moog ]
   * sponsor-patch: Check permission to unsubscribe sponsors-team (LP: #896884)
diff --git a/debian/control b/debian/control
index 7255fb1..aff2abc 100644
--- a/debian/control
+++ b/debian/control
@@ -105,6 +105,7 @@ Description: useful tools for Ubuntu developers
   - syncpackage - helper to prepare .changes file to upload synced packages
   - ubuntu-build - give commands to the Launchpad build daemons from the
     command line.
+  - ubuntu-is-seeded - query if a package is safe to upload during a freeze.
   - ubuntu-iso - output information of an Ubuntu ISO image.
   - ubuntu-upload-permission - query / list the upload permissions for a
     package.
diff --git a/debian/copyright b/debian/copyright
index c4de0f3..8ff2b25 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -150,6 +150,7 @@ Files: doc/pull-debian-debdiff.1
        doc/reverse-depends.1
        doc/sponsor-patch.1
        doc/ubuntu-dev-tools.5
+       doc/ubuntu-is-seeded.1
        doc/ubuntu-upload-permission.1
        doc/update-maintainer.1
        enforced-editing-wrapper
@@ -159,6 +160,7 @@ Files: doc/pull-debian-debdiff.1
        reverse-depends
        sponsor-patch
        test-data/*
+       ubuntu-is-seeded
        ubuntu-upload-permission
        ubuntutools/archive.py
        ubuntutools/builder.py
diff --git a/doc/ubuntu-is-seeded.1 b/doc/ubuntu-is-seeded.1
new file mode 100644
index 0000000..1947ba4
--- /dev/null
+++ b/doc/ubuntu-is-seeded.1
@@ -0,0 +1,60 @@
+.\" Copyright (C) 2011, Stefano Rivera <stefanor@ubuntu.com>
+.\"
+.\" Permission to use, copy, modify, and/or distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+.\" REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+.\" AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+.\" INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+.\" LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+.\" OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+.\" PERFORMANCE OF THIS SOFTWARE.
+.TH ubuntu\-is\-seeded 1 "December 2011" ubuntu\-dev\-tools
+
+.SH NAME
+ubuntu\-is\-seeded \- Determine whether a package is safe to upload
+during a freeze
+
+.SH SYNOPSIS
+.B ubuntu\-is\-seeded \fR[\fIoptions\fR] \fIpackage\fR...
+
+.SH DESCRIPTION
+Lists all the current daily images containing the specified packages.
+Or whether the package is part of the supported seed.
+.PP
+If it isn't on an image, it should be safe to upload.
+During the final freeze, one should avoid packages in the supported seed
+too.
+.PP
+An index of the current manifests is downloaded from UbuntuWire.
+
+.SH OPTIONS
+.TP
+\fB\-b\fR, \fB\-\-binary\fR
+The packages specified are binary packages.
+This is faster than source packages, as otherwise we must query LP to
+determine the binary packages that every specified source package
+builds.
+.TP
+\fB\-u\fR \fIURL\fR, \fB\-\-data\-url\fR=\fIURL\fR
+URL for index of seeded packages.
+Default: UbuntuWire's service at
+\fBhttp://qa.ubuntuwire.org/ubuntu-seeded-packages/seeded.json.gz\fR.
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+Display a help message and exit
+
+.SH EXAMPLES
+All the images that contain unity:
+.IP
+.nf
+.B ubuntu\-is\-seeded -b unity
+.fi
+
+.SH AUTHORS
+\fBubuntu\-is\-seeded\fR and this manpage were written by Stefano Rivera
+<stefanor@ubuntu.com>.
+.PP
+Both are released under the terms of the ISC License.
diff --git a/setup.py b/setup.py
index 6c895e5..840bfb2 100755
--- a/setup.py
+++ b/setup.py
@@ -40,6 +40,7 @@ scripts = ['404main',
            'submittodebian',
            'syncpackage',
            'ubuntu-build',
+           'ubuntu-is-seeded',
            'ubuntu-iso',
            'ubuntu-upload-permission',
            'update-maintainer',
diff --git a/ubuntu-is-seeded b/ubuntu-is-seeded
new file mode 100755
index 0000000..b443b00
--- /dev/null
+++ b/ubuntu-is-seeded
@@ -0,0 +1,129 @@
+#!/usr/bin/python
+#
+# Copyright (C) 2011, Stefano Rivera <stefanor@ubuntu.com>
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import collections
+import gzip
+import json
+import optparse
+import os
+import time
+import urllib
+
+from devscripts.logger import Logger
+
+from ubuntutools.lp.lpapicache import Distribution, PackageNotFoundException
+
+DATA_URL = 'http://qa.ubuntuwire.org/ubuntu-seeded-packages/seeded.json.gz'
+
+
+def load_index(url):
+    '''Download a new copy of the image contents index, if necessary,
+    and read it.
+    '''
+    cachedir = os.path.expanduser('~/.cache/ubuntu-dev-tools')
+    fn = os.path.join(cachedir, 'seeded.json.gz')
+
+    if (not os.path.isfile(fn)
+            or time.time() - os.path.getmtime(fn) > 60 * 60 * 2):
+        if not os.path.isdir(cachedir):
+            os.makedirs(cachedir)
+        urllib.urlretrieve(url, fn)
+
+    with gzip.open(fn, 'r') as f:
+        return json.load(f)
+
+
+def resolve_binaries(sources):
+    '''Return a dict of source:binaries for all binary packages built by
+    sources
+    '''
+    archive = Distribution('ubuntu').getArchive()
+    binaries = {}
+    for source in sources:
+        try:
+            spph = archive.getSourcePackage(source)
+        except PackageNotFoundException, e:
+            Logger.error(str(e))
+            continue
+        binaries[source] = sorted(set(bpph.getPackageName()
+                                      for bpph in spph.getBinaries()))
+
+    return binaries
+
+
+def present_on(appearences):
+    '''Format a list of (flavor, type) tuples into a human-readable string'''
+    present = collections.defaultdict(set)
+    for flavor, type_ in appearences:
+        present[flavor].add(type_)
+    for flavor, types in present.iteritems():
+        if len(types) > 1:
+            types.discard('supported')
+    output = ['  %s: %s' % (flavor, ', '.join(sorted(types)))
+              for flavor, types in present.iteritems()]
+    output.sort()
+    return '\n'.join(output)
+
+
+def output_binaries(index, binaries):
+    '''Print binaries found in index'''
+    for binary in binaries:
+        if binary in index:
+            print "%s is seeded in:" % binary
+            print present_on(index[binary])
+        else:
+            print "%s is not seeded." % binary
+
+
+def output_by_source(index, by_source):
+    '''Print binaries found in index. Grouped by source'''
+    for source, binaries in by_source.iteritems():
+        seen = False
+        for binary in binaries:
+            if binary in index:
+                seen = True
+                print "%s (from %s) is seeded in:" % (binary, source)
+                print present_on(index[binary])
+        if not seen:
+            print "%s's binaries are not seeded." % source
+
+
+def main():
+    '''Query which images the specified packages are on'''
+    parser = optparse.OptionParser('%prog [options] package...')
+    parser.add_option('-b', '--binary',
+                      default=False, action='store_true',
+                      help="Binary packages are being specified, "
+                           "not source packages (fast)")
+    parser.add_option('-u', '--data-url', metavar='URL',
+                      default=DATA_URL,
+                      help='URL for the seeded packages index. '
+                           'Default: UbuntuWire')
+    options, args = parser.parse_args()
+
+    if len(args) < 1:
+        parser.error("At least one package must be specified")
+
+    index = load_index(options.data_url)
+    if options.binary:
+        output_binaries(index, args)
+    else:
+        binaries = resolve_binaries(args)
+        output_by_source(index, binaries)
+
+
+if __name__ == '__main__':
+    main()