Browse older CallSphere articles on AI voice agents, contact center automation, and conversational AI.
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Learn how to use OpenAI's hosted tools — WebSearchTool, CodeInterpreterTool, FileSearchTool, and ImageGenerationTool — to give your agents powerful built-in capabilities without writing custom logic.
Master the @function_tool decorator in the OpenAI Agents SDK. Learn how to create sync and async tools, handle complex parameters, and wire multiple custom tools into your agents.
Learn how to build resilient agent tool pipelines using timeouts, failure_error_function, and tool_error_formatter in the OpenAI Agents SDK.
Learn how to use tool_namespace() in the OpenAI Agents SDK to group, organize, and dynamically load agent tools at scale, preventing name collisions and improving maintainability.
Master the handoff mechanism in the OpenAI Agents SDK — from basic handoffs to advanced triage systems with custom tool names, descriptions, and on_handoff callbacks.
Configure STT and TTS models for OpenAI voice agent pipelines — Whisper integration, language and prompt settings, voice selection, streaming TTS, and custom model implementations.
Build real-time voice agents using StreamedAudioInput with continuous microphone streaming, voice activity detection (VAD), turn detection, and lifecycle events for natural conversational flow.
Build low-latency browser-based voice agents using WebRTC peer connections and OpenAI's Realtime API — from obtaining ephemeral tokens to establishing audio tracks and handling speech-to-speech interactions.
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