errorCode":"CMN-101 - Parameter [from] value is invalid. - Callout not working in Developer Console

You mentioned “callout” and “A2P SMS”, which API did you call? Please share some code snippets.

Thank you for the reply and question.

I am using the API Send A2P SMS (https://developers.ringcentral.com/api-reference/High-Volume-SMS/createA2PSMS)

The endpoint is  https://platform.ringcentral.com/restapi/v1.0/account/XXXXXXXXX/a2p-sms/batches

I tried it in the Developer Console and here is the screenshot:

 

Here is my code in Apex:

 

Here is what I am sending in the body

 

{
   "text":"Welcome to the XXX Community Platform. You can go to the site at https://XXXXXXXXXXX--robert.sandbox.my.salesforce.com/client/s/to check the status of your account.",
   "messages":[
      {
         "to":[
            "+1931XXXXXXX"
         ],
         "text":"Welcome to the XXX Community Platform. You can go to the site at https://slpattorney--robert.sandbox.my.salesforce.com/client/s/to set up your user account. Your user name is: robert.davis+testcomm1@XXX.com."
      },
      {
         "to":[
            "+1931XXXXXXX"
         ],
         "text":"Welcome to the XXX Community Platform. You can go to the site at https://XXXXXXXXXX--robert.sandbox.my.salesforce.com/client/s/to set up your user account. Your user name is: none@none.com."
      }
   ],
   "from":"+1424XXXXXXX"
}

Thank you again

Thank you for your reply:

I am using the Send A2P SMS - found at this page: https://developers.ringcentral.com/api-reference/High-Volume-SMS/createA2PSMS

The endpoint : https://platform.ringcentral.com/restapi/v1.0/account/XXXXXXXXX/a2p-sms/batches

Here is the Developer Console attempt:

 

That apparently is the question I need to answer. Trying to work through whether it is or not with RingCentral. Thank you.

You can detect that yourself. See this dev guide article for the example code.

Or try this API from the API reference.