Telnyx Call Control API Enables Developers to Build AI-Powered Voice Agents

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Telnyx offers a webhook-driven API called Call Control that allows developers to programmatically manage inbound phone calls in real time. When a caller dials a Telnyx number, the platform sends HTTP webhook events to the developer's application, which can then issue commands such as answer, speak, or hang up. This event-driven loop creates a foundation for integrating AI capabilities — including speech-to-text, large language model processing, and text-to-speech — into live phone conversations. The system uses a unique call_control_id to track and control each call through its entire lifecycle. The API is language-agnostic and works with any framework capable of sending and receiving HTTP requests.

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