Getting started with Messaging Apps API

Before you get started, please contact your account manager to ensure that your account has access to this product and that the following points have been managed:

  • You will need a new sub-account id to use this API endpoint - it can’t be an existing SMS SubAccount.
  • In order to use your existing channels such as WhatsApp, Viber, Zalo, KakaoTalk, Facebook Messenger, WeChat, Line, etc, we will have to configure them for you.
  • The fallback mechanism has to be set up by the 8x8 team. You have to define which channels you want to use (and in which order) and the time between each channel is triggered.


Fallback mechanism on WhatsApp

WhatsApp ensures message delivery for 30 days, even if recipients are offline. To avoid duplicate messages for both WhatsApp and SMS, we highly recommend you extend the fallback duration. Please contact your account manager or our support team to help optimize your fallback duration.

Once this is done, you can use Messaging Apps API. The API key is available in the Customer Portal.


  • 8x8 Messaging API accepts an ApiKey Bearer Token authentication method.
  • You can generate tokens from your customer portal
  • You need to include the following header in your requests: Authorization: Bearer {apiKey}


Replace the {apiKey} placeholder with the key generated from the customer portal.

If you haven't created your account yet, please go to 8x8 website to sign up.


The 8x8 SMS subAccountId to use is defined in the URL where you send your request as shown below:{subAccountId}/messages


You must replace {subAccountId} in the URL above with the sub-account id that you want to use.