diff --git a/spec/AuthenticationAdapters.spec.js b/spec/AuthenticationAdapters.spec.js
index a0032248..6cc603a2 100644
--- a/spec/AuthenticationAdapters.spec.js
+++ b/spec/AuthenticationAdapters.spec.js
@@ -8,6 +8,7 @@ const responses = {
   instagram: { data: { id: 'userId' } },
   janrainengage: { stat: 'ok', profile: { identifier: 'userId' } },
   janraincapture: { stat: 'ok', result: 'userId' },
+  line: { userId: 'userId' },
   vkontakte: { response: [{ id: 'userId' }] },
   google: { sub: 'userId' },
   wechat: { errcode: 0 },
@@ -29,6 +30,7 @@ describe('AuthenticationProviders', function() {
     'twitter',
     'janrainengage',
     'janraincapture',
+    'line',
     'vkontakte',
     'qq',
     'spotify',
diff --git a/src/Adapters/Auth/index.js b/src/Adapters/Auth/index.js
index 5cc3f734..9e415662 100755
--- a/src/Adapters/Auth/index.js
+++ b/src/Adapters/Auth/index.js
@@ -13,6 +13,7 @@ const spotify = require('./spotify');
 const digits = require('./twitter'); // digits tokens are validated by twitter
 const janrainengage = require('./janrainengage');
 const janraincapture = require('./janraincapture');
+const line = require('./line');
 const vkontakte = require('./vkontakte');
 const qq = require('./qq');
 const wechat = require('./wechat');
@@ -44,6 +45,7 @@ const providers = {
   digits,
   janrainengage,
   janraincapture,
+  line,
   vkontakte,
   qq,
   wechat,
diff --git a/src/Adapters/Auth/line.js b/src/Adapters/Auth/line.js
new file mode 100644
index 00000000..e1a55849
--- /dev/null
+++ b/src/Adapters/Auth/line.js
@@ -0,0 +1,39 @@
+// Helper functions for accessing the line API.
+var Parse = require('parse/node').Parse;
+const httpsRequest = require('./httpsRequest');
+
+// Returns a promise that fulfills if this user id is valid.
+function validateAuthData(authData) {
+  return request('profile', authData.access_token).then(response => {
+    if (response && response.userId && response.userId === authData.id) {
+      return;
+    }
+    throw new Parse.Error(
+      Parse.Error.OBJECT_NOT_FOUND,
+      'Line auth is invalid for this user.'
+    );
+  });
+}
+
+// Returns a promise that fulfills iff this app id is valid.
+function validateAppId() {
+  return Promise.resolve();
+}
+
+// A promisey wrapper for api requests
+function request(path, access_token) {
+  var options = {
+    host: 'api.line.me',
+    path: '/v2/' + path,
+    method: 'GET',
+    headers: {
+      Authorization: 'Bearer ' + access_token,
+    },
+  };
+  return httpsRequest.get(options);
+}
+
+module.exports = {
+  validateAppId: validateAppId,
+  validateAuthData: validateAuthData,
+};