---
title: What is the Voice Call OTP PIN API?
description: "The **Voice Call OTP** PIN API allows you to programmatically send one-time passwords (OTPs) via voice calls. It converts a text PIN into audio using predefined clips, providing a secure and user-friendly authentication method. ### More Related Articles - [Is…"
url: "https://www.smsgatewaycenter.com/blog/kb/what-is-the-voice-call-otp-pin-api/"
updated: "2025-06-13"
category: OBD Voice Call / Voice Call OTP
---

# What is the Voice Call OTP PIN API?

The **Voice Call OTP** PIN API allows you to programmatically send one-time passwords (OTPs) via voice calls. It converts a text PIN into audio using predefined clips, providing a secure and user-friendly authentication method.

### More Related Articles

- [Is the Voice OTP API secure?](https://www.smsgatewaycenter.com/blog/kb/is-the-voice-otp-api-secure/)
- [How does the system handle failed deliveries?](https://www.smsgatewaycenter.com/blog/kb/how-does-the-system-handle-failed-deliveries/)
- [How can I test the Voice OTP API?](https://www.smsgatewaycenter.com/blog/kb/how-can-i-test-the-voice-otp-api/)

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