Tokens are used to provide a context in each request for authorization or authentication. It is important to understand distinctions between token types:
An Access Token is a token issued by authorization server and used by the application to make requests to all endpoints which require authentication.
A Refresh Token can be provided alongside the access token during authorization. It is a single-use token used to fetch a new access token before it expires. The refresh token itself cannot be used to access protected resources.
Token Expiration and Invalidation
Tokens may be invalidated for any of the following reasons:
- Access and refresh tokens can expire.
- Access and refresh tokens may be revoked by the end-user at any time.
- If a user's credentials are changed (via RingCentral's Service Web, Mobile Web or Admin Interface sites) all issued tokens are invalidated immediately, and all established sessions are terminated.
In an expired or invalidated token is used, RingCentral will respond with an HTTP error of "401 Unauthorized."
When tokens expire or are invalidated, applications must obtain a fresh access token again.
Authenticating Your Application to Obtain an Access Token
Each application that intends to obtain an access token must authenticate itself. Applications authenticate themselves by presenting their app's Client ID and Client Secret using the HTTP Basic authentication scheme.
For example, when you created your app RingCentral provided you with the following credentials for your app:
- Client ID:
- Client Secret:
These two credentials will be presented to RingCentral in an HTTP Authorization header in the following way:
- Combine them in a single string separated with a colon:
- Base64 encode the resulting string, which should produce:
- Use this encoded string in your token request as shown below:
POST /restapi/oauth/token HTTP/1.1 Host: platform.ringcentral.com Authorization: Basic WW91ckFwcEtleTpZb3VyQXBwU2VjcmV0 Content-Type: application/x-www-form-urlencoded;charset=UTF-8 grant_type=password&username=18887776655&extension=102&password=Myp@ssw0rd
Using Access Tokens to Call RingCentral APIs
Once an access token is obtained, it should be transmitted with each call to the RingCentral API using one of the following methods:
Option 1: Bearer (recommended)
Transmit the access token by way of the HTTP Bearer authentication scheme. For example:
GET /restapi/v1.0/account/1110475004/extension/1110475004/address-book/contact/29874662828 Authorization: Bearer 2YotnFZFEjr1zCsicMWpAA Host: platform.ringcentral.com Accept: application/json Connection: keep-alive
Option 2. Access token query parameter
Transmit the access token as a query parameter specified as a value. For example:
GET /restapi/v1.0/account/1110475004/extension/1110475004/address-book/contact/29874662828?access_token=2YotnFZFEjr1zCsicMWpAA Host: platform.ringcentral.com Accept: application/json Connection: keep-alive
There are some situations when the user may want to revoke the already granted access in order to stop application activity. To revoke access/refresh token the following request is used:
POST /restapi/oauth/revoke HTTP/1.1 Content-Type: application/x-www-form-urlencoded Authorization: Basic WW91ckFwcEtleTpZb3VyQXBwU2VjcmV0 token=U0pDMDFQMDFKV1MwMXwJ_W7L1fG4eGXBW9Pp-otywzriCw
The request must contain HTTP Basic authorization string Base64 encoded and generated from client credentials: the application key ("userid" in terms of RFC-2617) and application secret ("password" in terms of RFC-2617). The request should contain the
token form (preferred) or query parameter, which holds the value of an access or refresh token. The server returns
HTTP 200 OK when the request has been successfully processed. Please note that due to security reasons (to prevent eavesdropping) successful response is returned even if revocation was not successful (for instance if a token passed was issued to another application, expired, or by other means malformed. For additional details see RFC-7009: OAuth 2.0 Token Revocation.