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How to Build a High Volume A2P SMS Application on RingCentral Platform

Lets first get some basics right. **What is a High Volume A2P SMS Application?** Based on [CTIA guidelines]( any SMS communications that exceed more than 1000 messages/day from a number could be classified as an A2P SMS which is mainly for commercial purpose. If your business requirement is High-Volume A2P SMS, you should use the New RingCentral A2P SMS API product. The details for signing up for the program and getting access to the APIs could be found [here]( **How to Build a High Volume A2P Application?** **High Volume is supported on the Following Number Types** 1. US, Canada 10 DLC (Rate Supported is 1 messages/sec) (SMS Price for Outbound is $0.007 / SMS segment (160 Characters) and Inbound is Free ) 2. Toll-Free Number (Rate Supported is 8 messages /sec) (SMS Price for both are the same $0.007 / SMS segment (160 Characters) Inbound and Outbound) Prerequisites a. Procure a US10 DLC Number from RingCentral(Service Web Portal) and email to help convert the number to a Commercial A2P Line Or If you want to use Toll-Free Numbers you can Procure a Toll-Free Number and ask to covert it into A2P Commercial Line. **Steps for App Development** 1. Signup as a Registered Developer in RingCentral using your existing customer credentials or register for new developer credentials 2. If this is your First Time Creating an App you can get started using 3. For High Volume SMS your App needs an App Permission called "**A2PSMS**" . Please ask the RingCentral Developer support team to add that permission to your App by providing your App Name and AppId and email to 4. Now you can write your Code for sending the SMS. The API details are [here]( If you need assistance or some inspiration we have a demo [App]( Make sure you select the App Link for High Volume SMS ( . You can also review the code from the [GitHub Repo] ( Note: Today since this is a billable SMS so this High Volume API would only work on Production 5. Once you feel you are good to go, please email to Graduate your app to production. Please provide your feedback and we can't wait to see what you build.
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Developer sandbox tools

Using the RingCentral Phone for Desktop, you can dial or receive test calls, send and receive test SMS or Fax messages in your sandbox environment.

Download RingCentral Phone for Desktop:

Tip: switch to the "sandbox mode" before logging in the app:

  • On MacOS: press "fn + command + f2" keys
  • On Windows: press "Ctrl + F2" keys



Rylie-Community_Moderator contributed to this article ByrneReese contributed to this article