Billing for outbound calls in Plivo depends on whether the call was successfully connected.
If Plivo returns an HTTP response error, the request cannot be processed, and the call is not dialed. No charges will be applied.
Codes that indicate an HTTP response error include:
- 400 — A parameter is missing or invalid
- 401 — Authentication failed
- 404 — Resource not found
- 405 — HTTP method not allowed
- 500 — Server error
If Plivo successfully processes the request and initiates the call, You will be charged for the duration of the call, since a connection was established.