Send SMS - Error MSG-304

Sorry about that, thought you had things working the way you needed.

In production:

1. Has your app/integration been graduated to production?
2. Are you using the production API Base URL: https://platform.ringcentral.com/ ?
3. Are you using production API keys (if you have production access)?
4. Do I need to re-review this in the context of your production account?

Thanks for helping to isolate the answers.

No problem, i think i just got you confused by saying that it was working in staging.  To answer you questions

1. The app has been graduated
2. we are using production url
3. correct keys
4. I am not sure what you mean by review in conext of production account, but if that means that you can take a look at my account specifically, I am beginning to think that the problem may lie in an account specific spot.  It's just weird that we are perfectly fine in staging.

Thanks again for getting back!

And the "from" number is a number associated with the respective production RingCentral account?

That is correct

Could you send me the request headers and body you're using privately to: benjamin.dean@ringcentral.com please?

I'd like to run some tests myself please.

If you indicate a company number (not direct extension number) as your "from" number, you must be logged in as a company operator to be allowed to send SMS from this number. By default, main system administrator extension is defined as a company operator, but it can be changed in RingCentral Service Web UI .  

See also https://devcommunity.ringcentral.com/ringcentraldev/topics/how-to-send-sms-from-the-main-company-num...

HI, I am having a similar issue,

This is my header and request string.

curl --request POST --url 'https://platform.ringcentral.com/restapi/v1.0/account/~/extension/~/sms' --header 'accept: application/json' --header 'authorization: Bearer SUFEMDFQMDdQQVMwMHxBQUMxaXFvRnNqRjRQSE5yc1pCSTdacldhNjJLZl9wbHRHd3c3Z3R6eHZUZXRmNzFRMmJZOTlRRFdyTnU4a0dDb2N0NF9QWWRPMEVYNENYQjd4dmJsWHJobm5GOTQ4Zi1PTFRIczcycTVONm13em0xVDVFbTd3YkZXRGtIalZ1Qzk1R3Z5cnhkdTRFLVdQLVVtcVBsbzNtTmpTbG43LVpsM3BSb0dZR19MVlo5bGhoU1ZXNEYwVG9taHY3cjI0RVA3UnBoOXpZR1RqSDlLWDJuSFFHSlJjMnF8SHVZRXVRfEEwcDA1RzQ4S3JsaG5CcFViUEJ4SkF8QUE' --header 'content-type: application/json' --data '{"from":{"phoneNumber":"+18035096800"},"to":[{"phoneNumber":"(378) 400-1234"}],"text":"testing"}'


This is the response i recieve.
The error code is 304
{ "errorCode": "FeatureNotAvailable", "message": "Phone number doesn't belong to extension", "errors": [ { "errorCode": "MSG-304", "message": "Phone number doesn't belong to extension" } ] }

Dave,

The phone number you use to send a message from (+18035096800) must belong to authenticated user.

Hi, Anton Nikitin
I working on app: Should I define as "from number" the number from here: https://prnt.sc/njgern ?