API Connection Issues - Quota exceeded and throttling

We are having API connection issues with Legacy iSDK and OAuth 2 on several of our accounts this AM. Is there something going on system-wide?

We are getting this string on page now. It appears when we are trying to return data even through the dev platform with a valid access token:

{
“code”: “429”,
“message”: “Quota Exceeded”,
“status”: “Request Throttled”,
“details”: null
}

This issue remains unsolved for one application after adequate time to rebuild tokens.

A direct reach out from API development support would be appreciated.