diff --git a/disco/api/http.py b/disco/api/http.py
index a11f6ac..5a05f7a 100644
--- a/disco/api/http.py
+++ b/disco/api/http.py
@@ -137,7 +137,7 @@ class HTTPClient(LoggingClass):
         # If we got a success status code, just return the data
         if r.status_code < 400:
             return r
-        elif 400 < r.status_code < 500:
+        elif r.status_code != 429 and 400 < r.status_code < 500:
             raise APIException('Request failed', r.status_code, r.content)
         else:
             if r.status_code == 429:
diff --git a/disco/api/ratelimit.py b/disco/api/ratelimit.py
index 80ed940..8d91532 100644
--- a/disco/api/ratelimit.py
+++ b/disco/api/ratelimit.py
@@ -56,7 +56,7 @@ class RateLimiter(object):
                 return self.states[route].wait(timeout)
 
             if self.states[route].next_will_ratelimit():
-                gevent.spawn(self.states[route].cooldown).wait(timeout)
+                gevent.spawn(self.states[route].cooldown).get(True, timeout)
 
         return True
 
diff --git a/disco/bot/parser.py b/disco/bot/parser.py
index 7fa77d9..9963e5c 100644
--- a/disco/bot/parser.py
+++ b/disco/bot/parser.py
@@ -54,7 +54,7 @@ class ArgumentSet(object):
     def __init__(self, args=None, custom_types=None):
         self.args = args or []
         self.types = copy.copy(TYPE_MAP)
-        self.types.update(custom_types)
+        self.types.update(custom_types or {})
 
     def convert(self, types, value):
         for typ_name in types:
diff --git a/disco/types/channel.py b/disco/types/channel.py
index 2d18d15..587a9fd 100644
--- a/disco/types/channel.py
+++ b/disco/types/channel.py
@@ -6,7 +6,7 @@ from disco.util.cache import cached_property
 from disco.util.types import ListToDictType
 from disco.types.base import BaseType
 from disco.types.user import User
-from disco.types.permissions import *
+from disco.types.permissions import PermissionType, Permissions, Permissible
 from disco.voice.client import VoiceClient
 
 
@@ -31,7 +31,7 @@ class PermissionOverwrite(BaseType):
     deny = PermissionType()
 
 
-class Channel(BaseType):
+class Channel(BaseType, Permissible):
     id = skema.SnowflakeType()
     guild_id = skema.SnowflakeType(required=False)
 
@@ -46,6 +46,22 @@ class Channel(BaseType):
 
     overwrites = ListToDictType('id', skema.ModelType(PermissionOverwrite), stored_name='permission_overwrites')
 
+    def get_permissions(self, user):
+        if not self.guild_id:
+            return Permissions.ADMINISTRATOR
+
+        member = self.guild.members.get(user.id)
+        base = self.guild.get_permissions(user)
+
+        for ow in self.overwrites.values():
+            if ow.id != user.id and ow.id not in member.roles:
+                continue
+
+            base -= ow.deny
+            base += ow.allow
+
+        return base
+
     @property
     def is_guild(self):
         return self.type in (ChannelType.GUILD_TEXT, ChannelType.GUILD_VOICE)
diff --git a/disco/types/guild.py b/disco/types/guild.py
index d26749f..7802159 100644
--- a/disco/types/guild.py
+++ b/disco/types/guild.py
@@ -3,11 +3,11 @@ import copy
 
 from disco.api.http import APIException
 from disco.util import to_snowflake
-from disco.types.base import BaseType
 from disco.util.types import PreHookType, ListToDictType
+from disco.types.base import BaseType
 from disco.types.user import User
 from disco.types.voice import VoiceState
-from disco.types.permissions import PermissionType
+from disco.types.permissions import PermissionType, PermissionValue, Permissions, Permissible
 from disco.types.channel import Channel
 
 
@@ -51,7 +51,7 @@ class GuildMember(BaseType):
         return self.user.id
 
 
-class Guild(BaseType):
+class Guild(BaseType, Permissible):
     id = skema.SnowflakeType()
 
     owner_id = skema.SnowflakeType()
@@ -76,6 +76,18 @@ class Guild(BaseType):
     emojis = ListToDictType('id', skema.ModelType(Emoji))
     voice_states = ListToDictType('session_id', skema.ModelType(VoiceState))
 
+    def get_permissions(self, user):
+        if self.owner_id == user.id:
+            return PermissionValue(Permissions.ADMINISTRATOR)
+
+        member = self.get_member(user)
+        value = PermissionValue(self.roles.get(self.id).permissions)
+
+        for role in map(self.roles.get, member.roles):
+            value += role.permissions
+
+        return value
+
     def get_voice_state(self, user):
         user = to_snowflake(user)
 
diff --git a/disco/types/permissions.py b/disco/types/permissions.py
index a46767c..76c0ce9 100644
--- a/disco/types/permissions.py
+++ b/disco/types/permissions.py
@@ -1,9 +1,8 @@
 from skema import NumberType
 
-from holster.enum import Enum
+from holster.enum import Enum, EnumAttr
 
 Permissions = Enum(
-    NONE=0,
     CREATE_INSTANT_INVITE=1 << 0,
     KICK_MEMBERS=1 << 1,
     BAN_MEMBERS=1 << 2,
@@ -34,9 +33,48 @@ Permissions = Enum(
 
 
 class PermissionValue(object):
-    def __init__(self, value):
+    def __init__(self, value=0):
+        if isinstance(value, EnumAttr) or isinstance(value, PermissionValue):
+            value = value.value
+
         self.value = value
 
+    def can(self, *perms):
+        for perm in perms:
+            if isinstance(perm, EnumAttr):
+                perm = perm.value
+            if not (self.value & perm) == perm:
+                return False
+        return True
+
+    def add(self, other):
+        if isinstance(other, PermissionValue):
+            self.value |= other.value
+        elif isinstance(other, int):
+            self.value |= other
+        elif isinstance(other, EnumAttr):
+            setattr(self, other.name, True)
+        else:
+            raise TypeError('Cannot PermissionValue.add from type {}'.format(type(other)))
+        return self
+
+    def sub(self, other):
+        if isinstance(other, PermissionValue):
+            self.value &= ~other.value
+        elif isinstance(other, int):
+            self.value &= other
+        elif isinstance(other, EnumAttr):
+            setattr(self, other.name, False)
+        else:
+            raise TypeError('Cannot PermissionValue.sub from type {}'.format(type(other)))
+        return self
+
+    def __iadd__(self, other):
+        return self.add(other)
+
+    def __isub__(self, other):
+        return self.sub(other)
+
     def __getattribute__(self, name):
         if name in Permissions.attrs:
             return (self.value & Permissions[name].value) == Permissions[name].value
@@ -69,3 +107,9 @@ class PermissionValue(object):
 class PermissionType(NumberType):
     def __init__(self, *args, **kwargs):
         super(PermissionType, self).__init__(number_class=PermissionValue, number_type='PermissionValue', *args, **kwargs)
+
+
+class Permissible(object):
+    def can(self, user, *args):
+        perms = self.get_permissions(user)
+        return perms.administrator or perms.can(*args)
diff --git a/examples/basic_plugin.py b/examples/basic_plugin.py
index 36134e6..11a1b66 100644
--- a/examples/basic_plugin.py
+++ b/examples/basic_plugin.py
@@ -1,10 +1,12 @@
 import gevent
 import sys
+import json
 
 from disco import VERSION
 from disco.cli import disco_main
 from disco.bot import Bot
 from disco.bot.plugin import Plugin
+from disco.types.permissions import Permissions
 
 
 class BasicPlugin(Plugin):
@@ -81,6 +83,17 @@ class BasicPlugin(Plugin):
         gevent.sleep(1)
         vc.disconnect()
 
+    @Plugin.command('lol')
+    def on_lol(self, event):
+        event.msg.reply("{}".format(event.channel.can(event.msg.author, Permissions.MANAGE_EMOJIS)))
+
+    @Plugin.command('perms')
+    def on_perms(self, event):
+        perms = event.channel.get_permissions(event.msg.author)
+        event.msg.reply('```json\n{}\n```'.format(
+            json.dumps(perms.to_dict(), sort_keys=True, indent=2, separators=(',', ': '))
+        ))
+
 if __name__ == '__main__':
     bot = Bot(disco_main())
     bot.add_plugin(BasicPlugin)