diff --git a/synapse/handlers/login.py b/synapse/handlers/login.py
index 04f6dbb95e..5c39356d71 100644
--- a/synapse/handlers/login.py
+++ b/synapse/handlers/login.py
@@ -74,3 +74,10 @@ class LoginHandler(BaseHandler):
             user_id, token_id
         )
         yield self.store.flush_user(user_id)
+
+    @defer.inlineCallbacks
+    def add_threepid(self, user_id, medium, address, validated_at):
+        yield self.store.user_add_threepid(
+            user_id, medium, address, validated_at,
+            self.hs.get_clock().time_msec()
+        )
\ No newline at end of file
diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py
index 750d826f91..6045b016ef 100644
--- a/synapse/rest/client/v2_alpha/account.py
+++ b/synapse/rest/client/v2_alpha/account.py
@@ -18,6 +18,7 @@ from twisted.internet import defer
 from synapse.api.constants import LoginType
 from synapse.api.errors import LoginError, SynapseError, Codes
 from synapse.http.servlet import RestServlet
+from synapse.util.async import run_on_reactor
 
 from ._base import client_v2_pattern, parse_json_dict_from_request
 
@@ -39,6 +40,8 @@ class PasswordRestServlet(RestServlet):
 
     @defer.inlineCallbacks
     def on_POST(self, request):
+        yield run_on_reactor()
+
         body = parse_json_dict_from_request(request)
 
         authed, result, params = yield self.auth_handler.check_auth([
@@ -78,16 +81,51 @@ class PasswordRestServlet(RestServlet):
 class ThreepidRestServlet(RestServlet):
     PATTERN = client_v2_pattern("/account/3pid")
 
+    def __init__(self, hs):
+        super(ThreepidRestServlet, self).__init__()
+        self.hs = hs
+        self.login_handler = hs.get_handlers().login_handler
+        self.identity_handler = hs.get_handlers().identity_handler
+        self.auth = hs.get_auth()
+
     @defer.inlineCallbacks
     def on_POST(self, request):
+        yield run_on_reactor()
+
         body = parse_json_dict_from_request(request)
 
         if 'threePidCreds' not in body:
             raise SynapseError(400, "Missing param", Codes.MISSING_PARAM)
+        threePidCreds = body['threePidCreds']
 
         auth_user, client = yield self.auth.get_user_by_req(request)
 
+        threepid = yield self.identity_handler.threepid_from_creds(threePidCreds)
 
+        if not threepid:
+            raise SynapseError(400, "Failed to auth 3pid")
+
+        for reqd in ['medium', 'address', 'validatedAt']:
+            if reqd not in threepid:
+                logger.warn("Couldn't add 3pid: invalid response from ID sevrer")
+                raise SynapseError(500, "Invalid response from ID Server")
+
+        yield self.login_handler.add_threepid(
+            auth_user.to_string(),
+            threepid['medium'],
+            threepid['address'],
+            threepid['validatedAt'],
+        )
+
+        if 'bind' in body and body['bind']:
+            logger.debug("Binding emails %s to %s" % (
+                threepid, auth_user.to_string()
+            ))
+            yield self.identity_handler.bind_threepid(
+                threePidCreds, auth_user.to_string()
+            )
+
+        defer.returnValue((200, {}))
 
 
 def register_servlets(hs, http_server):
diff --git a/synapse/rest/client/v2_alpha/register.py b/synapse/rest/client/v2_alpha/register.py
index a5fec45dce..e93897e285 100644
--- a/synapse/rest/client/v2_alpha/register.py
+++ b/synapse/rest/client/v2_alpha/register.py
@@ -50,6 +50,7 @@ class RegisterRestServlet(RestServlet):
         self.auth_handler = hs.get_handlers().auth_handler
         self.registration_handler = hs.get_handlers().registration_handler
         self.identity_handler = hs.get_handlers().identity_handler
+        self.login_handler = hs.get_handlers().login_handler
 
     @defer.inlineCallbacks
     def on_POST(self, request):
@@ -61,7 +62,6 @@ class RegisterRestServlet(RestServlet):
 
         if 'username' in body:
             desired_username = body['username']
-            print "username in body"
             yield self.registration_handler.check_username(desired_username)
 
         is_using_shared_secret = False
@@ -118,17 +118,31 @@ class RegisterRestServlet(RestServlet):
             password=new_password
         )
 
-        if 'bind_email' in params and params['bind_email']:
-            logger.info("bind_email specified: binding")
+        if LoginType.EMAIL_IDENTITY in result:
+            threepid = result[LoginType.EMAIL_IDENTITY]
 
-            emailThreepid = result[LoginType.EMAIL_IDENTITY]
-            threepidCreds = emailThreepid['threepidCreds']
-            logger.debug("Binding emails %s to %s" % (
-                emailThreepid, user_id
-            ))
-            yield self.identity_handler.bind_threepid(threepidCreds, user_id)
-        else:
-            logger.info("bind_email not specified: not binding email")
+            for reqd in ['medium', 'address', 'validatedAt']:
+                if reqd not in threepid:
+                    logger.info("Can't add incomplete 3pid")
+                else:
+                    yield self.login_handler.add_threepid(
+                        user_id,
+                        threepid['medium'],
+                        threepid['address'],
+                        threepid['validatedAt'],
+                    )
+
+            if 'bind_email' in params and params['bind_email']:
+                logger.info("bind_email specified: binding")
+
+                emailThreepid = result[LoginType.EMAIL_IDENTITY]
+                threepidCreds = emailThreepid['threepidCreds']
+                logger.debug("Binding emails %s to %s" % (
+                    emailThreepid, user_id
+                ))
+                yield self.identity_handler.bind_threepid(threepidCreds, user_id)
+            else:
+                logger.info("bind_email not specified: not binding email")
 
         result = {
             "user_id": user_id,
diff --git a/synapse/storage/registration.py b/synapse/storage/registration.py
index f61d8fdb6a..4bc01f3cc2 100644
--- a/synapse/storage/registration.py
+++ b/synapse/storage/registration.py
@@ -175,3 +175,14 @@ class RegistrationStore(SQLBaseStore):
             return rows[0]
 
         return None
+
+    @defer.inlineCallbacks
+    def user_add_threepid(self, user_id, medium, address, validated_at, added_at):
+        yield self._simple_upsert("user_threepids", {
+            "user": user_id,
+            "medium": medium,
+            "address": address,
+        }, {
+            "validated_at": validated_at,
+            "added_at": added_at,
+        })
\ No newline at end of file