Usman
11/07/2025, 1:04 PMpasamelo
11/07/2025, 1:57 PMluisson
11/07/2025, 2:35 PMPeter
11/07/2025, 7:37 PMChiranjeet Mishra
11/08/2025, 1:04 AM/call endpoint. You'll need to specify the assistantId, phoneNumberId, and the `customer`'s phone number. You can find the API call format and example JSON payloads [here](https://docs.vapi.ai/calls/outbound-calling).
3. **Configuring Trusted Calling Standards**: To improve call answer rates, set up proper caller ID and trusted calling standards. Implement STIR/SHAKEN frameworks in your Twilio Console as described [here](https://docs.vapi.ai/calls/outbound-calling#trusted-calling-and-caller-id).
4. **Batch Calling**: If you need to call multiple numbers simultaneously, use the customers parameter to send array details, and you can also schedule these using schedulePlan.
For detailed processes on launching campaigns or handling outbound calls programmatically, refer to the [Outbound Campaigns Overview](https://docs.vapi.ai/outbound-campaigns/overview).
If you encounter any issues with call initiation, please refer to the call logs and the endedReason values to diagnose common call errors [here](https://docs.vapi.ai/calls/call-ended-reason).