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Kakao Login

JavaScript SDK

This document describes how to integrate Kakao Login APIs into your service with Kakao SDK for JavaScript ("JavaScript SDK").

You can test the features described in this document in [Tools] > [JS SDK demo] menu.

For a Kakao Login button, you can download the resources provided by Kakao or customize buttons according to your service user interface by referring to the Design Guide.

Before you begin

Understand login flow

To integrate Kakao Login into your web page with the JavaScript SDK, you need to fully understand how Kakao Login works by referring to REST API > Before you begin.

On mobile devices where Kakao Talk is installed, users can use the Kakao Simple Login function. Here is the flow of Kakao Simple Login.

1. Obtain an authorization code

If a user attempts Kakao Simple Login, Kakao.Auth.authorize() is invoked. Then, Kakao Talk is launched and the login page is prompted to the user.

Once the user approves permissions by clicking [Accept and Continue], the Kakao authorization server validates the user’s credentials and issues an authorization code to the specified redirect URI.

If Kakao Talk is not installed on a user's device, the Kakao Login page where the user can log in with a Kakao ID and password is open.

2. Obtain tokens

Implement a process the Get token by using a REST API.

When you request to exchange the authorization code for tokens, the Kakao authorization server validates the request and issues an access token and a refresh token.

3. Handle users to complete login

When an access token is issued, you can call the Retrieving user information API by passing the issued access token. With the user data returned to this API, you can check if the user is registered in your service.

For a new user, register the user in your service's user database as a new member. For a registered user, you can create a login session for the user in your service and show a login page. To see how to handle users depending on the registration status, refer to Handling Kakao Login users.

Signup

The Kakao Login API functions to authenticate users on the Kakao platform and links their accounts with your app so that they can use your service. However, those who do not have Kakao Accounts need to create a new account in your service. In this case, you need to implement the process of creating a new account and updating the user information in your own service.

Login

Basic information

Reference	App setting
`Kakao.Auth.authorize()` `Kakao.Auth.setAccessToken()`	Install Initialize

Permission	Prerequisite	Kakao Login	User consent
-	Register platforms Activate Kakao Login Set Redirect URI Manage consent items Advanced: Activate OpenID Connect(Optional) Set Simple Signup(for Kakao Sync)	Required	Required: Required consent item

Simple Login

Authenticate a user through Kakao Talk without inputting the Kakao Account information and get an authorization code.

Request

For the Simple Login function, call the Kakao.Auth.authorize() function. If Kakao.Auth.authorize() is invoked, Kakao Talk is launched and the Consent screen is presented.

Response

If a user consents to the provision of their personal information and the use of your service, the Kakao authorization server issues the authorization code to the Redirect URI of the service server with the HTTP response status code 302.

Sample

Kakao.Auth.authorize({
  redirectUri: '${REDIRECT_URI}',
});

Get token

Gets tokens with the obtained authorization code. After Simple Login, request the GET token API with the obtained authorization code to complete the login.

Note

When you call 'Kakao.Auth.authorize' through JavaScript SDK, you must use your JavaScript key used to initialize the SDK. However, when you request the Get token API, use your REST API key.

Set token

Assigns the access token to SDK. To to call the Kakao APIs, you need to assign your access token to SDK.

Request

Call the Kakao.Auth.setAccessToken() function with the access token passed in the login response.

Sample

Kakao.Auth.setAccessToken('${ACCESS_TOKEN}');

Additional Feature

Additional features for Simple Login are below.

Request additional consent

You can request consent to access permission or specific personal information if the user has not agreed when the user logged in with Kakao. Call the authorize() function with the scopes you want to request consent through the scope parameter.

Kakao.Auth.authorize({
  redirectUri: '${REDIRECT_URI}',
  scope: 'account_email,gender',
});

Auto-login from Kakao Talk

To request Auto-login from Kakao Talk, call the authorize() function and set prompt parameter to none.

Kakao.Auth.authorize({
  redirectUri: '${REDIRECT_URI}',
  prompt: 'none',
});

If the user is not registered to the app, the following error response will be passed to the redirect_uri. In this case, the user should sign in to the service manually.

HTTP/1.1 302 Found
Content-Length: 0
Location: ${REDIRECT_URI}?error=consent_required&error_description=user%20consent%20required.

Get consent to desired service terms

Note

This API is only allowed for the service that adopted Kakao Sync.

This API enables you to request consent to specific service terms that a user has not consented to, regardless of whether the user has already signed up. Pass serviceTerms as a parameter to the authorize() function. Make sure to include all tags of the service terms needed to get consent in a single String format by separating respective tags by comma(,).

Kakao.Auth.authorize({
  redirectUri: '${REDIRECT_URI}',
  serviceTerms: 'tag1,tag2',
});

Reauthentication login

To reauthenticate the user, set prompt to login. The user will log in again with Kakao Account even though already logged in.

Kakao.Auth.authorize({
  redirectUri: '${REDIRECT_URI}',
  prompt: 'login',
});

Provide login hint

To fill in the ID automatically, use the loginHint parameter. The value of the loginHint parameter will be entered in the Kakao Account login page.

Kakao.Auth.authorize({
  redirectUri: '${REDIRECT_URI}',
  loginHint: '${HINT}'
});

Using login hint with auto-login

The loginHint and prompt parameters can be used together.

Kakao.Auth.authorize({
  redirectUri: '${REDIRECT_URI}',
  prompt: 'none',
  loginHint: '${HINT}',
});

Kakao Account easy login

To request Kakao Account easy login, set the prompt parameter to select_account.

Kakao.Auth.authorize({
  redirectUri: '${REDIRECT_URI}',
  prompt: 'select_account',
});

Logout

Basic information

Reference	App setting
`logout()`	Install Initialize

Permission	Prerequisite	Kakao Login	User consent
-	Register platforms Activate Kakao Login	Required	-

Makes the issued access token and the refresh token expire.

Note

Kakao.Auth.logout() makes the tokens expire, not make a user log out from your service or Kakao Account. Therefore, you need to implement the logout process internally in your service.

Request

Call the Kakao.Auth.logout() function.

Response

Kakao.Auth.logout() returns Promise. If the promise is fulfilled, the tokens issued during the login process expire, and the user is logged out. After the user is logged out, you cannot call the Kakao APIs using the access token.

Sample

Kakao.Auth.logout()
  .then(function(response) {
    console.log(Kakao.Auth.getAccessToken()); // null
  })
  .catch(function(error) {
    console.log('Not logged in.');
  });

Unlink

Basic information

Reference	App setting
`Kakao.API.request()`	Install Initialize

Permission	Prerequisite	Kakao Login	User consent
-	Register platforms Activate Kakao Login	Required	-

Unlinks the user and the service app.

Request

To unlink a user's Kakao Account from your app, call the Kakao.API.request() function. The available parameters are below.

Parameter

Name	Type	Description	Required
url	`String`	Fixed to `/v1/user/unlink`.	O

Response

Kakao.API.request() returns Promise. If the promise is fulfilled, the user's service user ID is returned.

Sample

Kakao.API.request({
  url: '/v1/user/unlink',
})
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

Retrieve user information

Basic information

Reference	App setting
`Kakao.API.request()`	Install Initialize

Permission	Prerequisite	Kakao Login	User consent
-	Register platforms Activate Kakao Login Manage consent items	Required	Required: All consent items to request user information

Retrieves Kakao Account information of a user who is logged into Kakao.

Request

To retrieve the Kakao Account information of a logged-in user, call the kakao.API.request() function. The available parameters are below.

Parameter

Name	Type	Description	Required
url	`String`	Fixed to `/v2/user/me`.	O
data	`Object`	Object that contains the parameter to be passed when requesting the API.	X

data: Retrieving user information

Name	Type	Description	Required
property_keys	`String[]`	Use this parameter to specify the scopes of user information to be requested in ["key1","key2"] format.	X

Response

Kakao.API.request() returns Promise. If the promise is fulfilled, the user information is returned. For the detailed user information in response, refer to REST API.

Sample

Kakao.API.request({
  url: '/v2/user/me',
})
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

Additional feature

Retrieving specific user information

To request a specific user information, use the property_keys parameter.

Kakao.API.request({
  url: '/v2/user/me',
  data: {
    property_keys: ['kakao_account.email', 'kakao_account.gender'],
  },
})
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

Store user information

Basic information

Reference	App setting
`Kakao.API.request()`	Install Initialize

Permission	Prerequisite	Kakao Login	User consent
-	Register platforms Activate Kakao Login Manage user properties	Required	-

Stores or updates additional user information on the Kakao platform to use in a service, which is called 'User properties'.

Request

To store or update the additional user information needed for the service, call the Kakao.API.request() function. The available parameters are below.

Pass the custom property keys and values that you want to update through properties under data. For example, if you want to update a user's clothing size, set properties to clothing_size: 'small'.

Parameter

Name	Type	Description	Required
url	`String`	Fixed to `'/v1/user/update_profile'`.	O
data	`Object`	Object that contains the parameter to be passed when requesting the API.	X

data: Storing user information

Name	Type	Description	Required
properties	`Object`	User information that you want to update in {key:value} format. For `key`, check the registered property keys in [My Application] > [Kakao Login] > [User Properties].	O

Response

Kakao.API.request() returns Promise. If the promise is fulfilled, the service user ID requested to update information is returned.

Sample

Kakao.API.request({
  url: '/v1/user/update_profile',
  data: {
    properties: {
      '${CUSTOM_PROPERTY_KEY}': '${CUSTOM_PROPERTY_VALUE}',
    },
  },
})
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

Shipping address

Basic information

Reference	App setting
`Kakao.Auth.selectShippingAddress()` `Kakao.API.request()`	Install Initialize

Permission	Prerequisite	Kakao Login	User consent
Required	Register platforms Activate Kakao Login Manage consent items	Required	Required: Shipping information (shipping_address)

Select shipping address

Prompts the shipping address picker to allow users to select a shipping address and returns the selected shipping address ID.

Request

Call Kakao.Auth.selectShippingAddress().

Response

The function returns an addressId for the selected shipping address. Request Retrieve shipping address with the addressId to get the detailed shipping address.

Refer to Troubleshooting for the error cause.

Sample

// Select shipping address
Kakao.Auth.selectShippingAddress()
  .then(function(selectedAddress) {
    // Retrieve shipping address
    return Kakao.API.request({
      url: '/v1/user/shipping_address',
      data: {
        address_id: selectedAddress.address_id,
      },
    });
  })
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

Retrieve shipping address

Retrieves shipping addresses saved in the user's Kakao Account.

Request

Call the Kakao.API.request() function, and set url to /v1/user/shipping_address.

Specify the address ID to the address_id parameter.

Parameter

Name	Type	Description	Required
url	`String`	Fixed as '/v1/user/shipping_address'.	O
data	`Object`	Object that contains the parameter to be passed when requesting the API.	X

data: Retrieve shipping address

Name	Type	Description	Required
address_id	`Number`	Shipping address ID Used to specify an address ID to get a specific shipping address.	X
from_updated_at	`Number`	If multiple shipping addresses return through multiple pages, only the shipping addresses that are changed after the `updated_at` time return. The last shipping address on the previous page is used for an input value for the next page. If set to `0`, shipping addresses are retrieved from the beginning.	X
page_size	`Number`	Number of (two or more) shipping addresses displayed on a page. (Default: 10)	X

Response

Kakao.API.request() returns Promise. If the promise is fulfilled, the user's shipping addresses are returned. For the detailed response fields, refer to REST API.

If not using Select shipping address API, the response may not include the shipping address when the user did not consent to the [Shipping information]. Refer to No shipping address in the response.

Refer to Troubleshooting for the error cause.

Sample

Kakao.API.request({
  url: '/v1/user/shipping_address',
  data: {
    address_id: ${ADDRESS_ID},
  },
})
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

Retrieve consent details

Basic information

Reference	App setting
`Kakao.API.request()`	Install Initialize

Permission	Prerequisite	Kakao Login	User consent
-	Register platforms Activate Kakao Login Manage consent items	Required	-

Retrieves the detailed information of the scopes (consent items) that a user has agreed to. You can check all scopes set in [My Application] > [Kakao Login] > [Consent Items] and the details of the scopes. If a user has consented to the scope before, the scope is included in the response even though your app is currently not using the scope.

Request

Call the Kakao.API.request() function.

Parameter

Name	Type	Description	Required
url	`String`	Fixed to `/v2/user/scopes`.	O
data	`Object`	Object that contains the parameters to be passed when requesting the API.	X

data: Retrieving consent details

Name	Type	Description	Required
scopes	`String[]`	Used when you retrieve specific scopes only. List of scope IDs you want to retrieve. You can figure out each scope's ID in [My Application] > [Kakao Login] > [Consent Items]. (Example: `["account_email","gender"]`)	X

Response

Kakao.API.request() returns Promise. Refer to REST API for the detail.

Sample

Kakao.API.request({
  url: '/v2/user/scopes',
})
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

Additional feature

Check specific scopes

You can also designate the scopes you want to check the details by specifying the scopes parameter.

Kakao.API.request({
  url: '/v2/user/scopes',
  data: {
    scopes: ['account_email', 'gender'],
  },
})
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

Revoke consent

Basic information

Reference	App setting
`Kakao.API.request()`	Install Initialize

Permission	Prerequisite	Kakao Login	User consent
-	Register platforms Activate Kakao Login Manage consent items	Required	-

Revokes the scope that a user has agreed to. You can only revoke the scope with "revocable":true among the scopes retrieved through the Retrieving consent details API. If you request to revoke the scope that is not revocable, an error is returned.

Request

Call the Kakao.API.request() function. Set the ID of the consent item to revoke in scopes parameter under data.

Parameter

Name	Type	Description	Required
url	`String`	Fixed to `/v2/user/revoke/scopes`.	O
data	`Object`	Object that contains the parameters to be passed when requesting the API.	O

data: Revoking consent

Name	Type	Description	Required
scopes	`String[]`	List of scope IDs you want to revoke. You can revoke only the scope with `"revocable":true` among the scopes retrieved through the Retrieving consent details API. You can figure out each scope's ID in [My Application] > [Kakao Login] > [Consent Items]. (Example: `["account_email","gender"]`)	O

Response

Kakao.API.request() returns Promise. Refer to REST API for the detail.

Sample

Kakao.API.request({
  url: '/v2/user/revoke/scopes',
  data: {
    scopes: ['account_email', 'gender'],
  },
})
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

Service terms

Basic information

Reference	App setting
`Kakao.API.request()`	Install Initialize

Permission	Prerequisite	Kakao Login	User consent
Required: Kakao Sync	Register platforms Activate Kakao Login Manage consent items Set Simple Signup	Required	-

Note

This API is only allowed for the service that adopted Kakao Sync.

Service terms precautions

User consent for service terms must be managed directly by the service in accordance with the Service terms management policy. It is recommended to obtain consent for service terms not agreed to through Kakao Sync Simple Signup via a separate consent procedure. You can obtain consent for required service terms that the user has not agreed to or has revoked consent by the Get consent to desired service terms.

Retrieve consent details for service terms

Retrieves the service terms that a user has consented to.

Request

Call the kakao.API.request() function.

Parameter

Name	Type	Description	Required
url	`String`	Fixed to `/v2/user/service_terms`.	O
data	`Object`	Object that contains the parameter to be passed when requesting the API.	X

data: Retrieving consent details for service terms

Name	Type	Description	Required
result	`String`	List of service terms to retrieve, use one of the followings. `agreed_service_terms`: List of service terms users have agreed to (default) `app_service_terms`: List of service terms enabled for the app	X
tags	`String`	Tags of service terms to retrieve, limited in the list specified by `result`. Pass multiple tags as a single comma (`,`) separated string.	X

Response

Kakao.API.request() returns Promise. If the promise is fulfilled, the information of the service terms to which a user consented to is returned. For the detailed response fields, refer to REST API.

Sample

Kakao.API.request({
  url: '/v2/user/service_terms',
})
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

Revoke consent for service terms

Revokes a service terms that a specific user has agreed to. Only service terms with a revocable value of true in the Retrieving consent details for service terms response can be revoked.

Request

Call the kakao.API.request() function. Specify the tags of the service terms you want to revoke consent for in tags under data.

Parameter

Name	Type	Description	Required
url	`String`	Fixed to `/v2/user/revoke/service_terms`.	O
data	`Object`	Object that contains the parameter to be passed when requesting the API.	O

data: Revoke consent for service terms

Name	Type	Description	Required
tags	`String`	Service terms tags to revoke. Pass multiple tags as a single comma (`,`) separated string, refer to Example. Note: Only service terms with a `revocable` value of `true` in the Retrieving consent details for service terms response can be revoked.	O

Response

Kakao.API.request() returns Promise. If the promise is fulfilled, the information of the revoked service terms is returned. For the detailed response fields, refer to REST API.

Sample

Kakao.API.request({
  url: '/v2/user/revoke/service_terms',
  data: {
    tags: 'test_tag1,test_tag2'
  },
})
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

Additional feature

Retrieving all service terms registered in app

To retrieve all service terms registered in app, set result under data to app_service_terms.

Kakao.API.request({
  url: '/v2/user/service_terms',
  data: {
    result: 'app_service_terms',
  },
})
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

Retrieving specific service terms

To retrieve information of specific service terms, set tags under data to the IDs of the desired service terms.

Kakao.API.request({
  url: '/v2/user/service_terms',
  data: {
    tags: 'test_tag1,test_tag2'
  },
})
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

Advanced: Manual signup

Basic information

Reference	App setting
`Kakao.API.request()`	Install Initialize

Permission	Prerequisite	Kakao Login	User consent
Required	Register platforms Activate Kakao Login	Required	-

Note

The Manual signup API is only for the app with the Auto-link option disabled. Before using this API, check out when to use this API and the cautions in REST API.

The Manual signup API manually links a user with your app to complete signup when the Auto-link is disabled. To figure out if the currently logged-in user needs to be linked with your app, check the value of has_signed_up in the response of the Retrieving user information API and handle each case:

true: The user is already linked with your app. You do not need to call the Manual signup API.
false: The user is not linked with your app. You must link the user with your app manually.
null: Your app is using the Auto-link feature. You do not need to call the Manual signup API.

Request

Call the Kakao.API.request() function.

Parameter

Name	Type	Description	Required
url	`String`	Fixed to `/v1/user/signup`.	O
data	`Object`	Object that contains the parameter to be passed when requesting the API.	X

data: Manual signup

Name	Type	Description	Required
properties	`Object`	Used when you want to store user properties when linking a user. (Example: {key:value}) Refer to Manage user properties and Store user information.	X

Response

Kakao.API.request() returns Promise. If the promise is fulfilled, the user's service user ID is returned. To check the request result in detail, call the Retrieving user information API again and see the value of has_signed_up and properties.status in the response.

Sample

Kakao.API.request({
  url: '/v1/user/signup',
})
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

Additional feature

Update additional information

If you want to store the user's information when the user is linked to your app, pass properties in data.

Kakao.API.request({
  url: '/v1/user/signup',
  data: {
    properties: {
      '${CUSTOM_PROPERTY_KEY}': '${CUSTOM_PROPERTY_VALUE}',
    },
  },
})
  .then(function(response) {
    console.log(response);
  })
  .catch(function(error) {
    console.log(error);
  });

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Kakao Login

JavaScript SDK

Before you begin

Understand login flow

Login

Basic information

Simple Login

Request

Response

Sample

Get token

Set token

Request

Sample

Additional Feature

Request additional consent

Auto-login from Kakao Talk

Get consent to desired service terms

Reauthentication login

Provide login hint

Using login hint with auto-login

Kakao Account easy login

Logout

Basic information

Request

Response

Sample

Unlink

Basic information

Request

Parameter

Response

Sample

Retrieve user information

Basic information

Request

Parameter

data: Retrieving user information

Response

Sample

Additional feature

Retrieving specific user information

Store user information

Basic information

Request

Parameter

data: Storing user information

Response

Sample

Shipping address

Basic information

Select shipping address

Request

Response

Sample

Retrieve shipping address

Request

Parameter

data: Retrieve shipping address

Response

Sample

Retrieve consent details

Basic information

Request

Parameter

data: Retrieving consent details

Response

Sample

Additional feature

Check specific scopes

Revoke consent