Why You Don’t Need 3 API Keys to Build an AI Voice Agent

Building AI voice agents used to mean juggling multiple providers — one for speech-to-text (STT), another for language models (LLMs), and yet another for text-to-speech (TTS). Each came with separate API keys, dashboards, billing, quotas, integration headaches, and failure points. The result? Powerful systems but slow to build, hard to maintain, and painful to scale.

Today, that complexity is no longer necessary.

With Inferencing in VideoSDK AI Voice Agents, you don’t need three different API keys or vendor accounts. Everything STT, LLM, TTS, and realtime models runs through a single unified platform, directly inside your voice pipeline using the Agent Runtime Dashboard and Python Agents SDK.

Inferencing works seamlessly with both the CascadingPipeline and the RealtimePipeline, giving you the flexibility to build modular, staged agents or fully streaming, low-latency voice experiences. Whether you need incremental transcripts, tool-calling workflows, or native realtime audio conversations, VideoSDK lets you do it all — without the API chaos.

Sign up to dashboard to check inference - url

What is VideoSDK Inference?

VideoSDK Inference is a managed gateway that gives you access to multiple AI models. All without providing your own API keys for providers like Sarvam AI or Google Gemini.

Authentication, routing, retries, and billing are handled by VideoSDK usage is simply charged against your VideoSDK account balance.

Supported Categories

• STT: Sarvam, Google, Deepgram
• LLMs: Google Gemini
• TTS: Sarvam, Google, Cartesia
• Realtime: Gemini Native Audio

Inferencing via Agent Runtime Dashboard

Inferencing in VideoSDK is now fully accessible through the dashboard, giving developers direct control over model selection and pipeline configuration without needing to manage infrastructure manually.

Sign up to dashboard - url

From the dashboard, developers can:

• Select STT, LLM, TTS, or Realtime models and enable them in the pipeline with a single click.
• Switch providers instantly, allowing rapid experimentation and iteration .
• Attach deployment endpoints for web or telephony, making the agent immediately accessible to users.
• With this approach, ideas move from configuration to live, interactive conversations in minutes, making it possible to test new workflows, swap models, or iterate on conversational design almost instantly.

Inferencing via Code (Agents SDK)

With VideoSDK Inferencing, developers can now integrate STT, LLM, TTS, and Realtime models directly into their voice agents all handled inside the VideoSDK. This enables rapid experimentation, modular pipelines, and low-latency real-time conversations.

Installation

The Inference plugin is included in the core VideoSDK Agents SDK. Install it via

pip install videosdk-agents

Importing Inference Classes

You can import the Inference classes directly from videosdk.agents.inference:

from videosdk.agents.inference import STT, LLM, TTS, Realtime

CascadingPipeline Example

The CascadingPipeline is ideal for modular, stage-by-stage processing. Here’s an example of building a simple agent using STT, LLM, and TTS via the VideoSDK Inference Gateway:

pipeline = CascadingPipeline(
        stt=STT.sarvam(model_id="saarika:v2.5", language="en-IN"),
        llm=LLM.google(model="gemini-2.5-flash"),
        tts=TTS.sarvam(model_id="bulbul:v2", speaker="anushka", language="en-IN"),
        vad=SileroVAD()
    )

RealTimePipeline Example

For low-latency, fully streaming voice agents, the RealTimePipeline handles Realtime inference with minimal delay. Here’s an example using Gemini Live Native Audio:

pipeline = RealTimePipeline(
        model=Realtime.gemini(
            model="gemini-2.5-flash-native-audio-preview-12-2025",
            voice="Puck",
            language_code="en-US",
            response_modalities=["AUDIO"],
            temperature=0.7
        )
    )

With this approach, developers retain:

• Full programmatic control over pipeline stages, model parameters, and execution behavior.
• Modular provider replacement, making it easy to swap STT, LLM, or TTS engines. The result: a fully configurable, production-ready AI voice agent that can be deployed in minutes.

Conclusion

Voice AI is no longer limited by model capability. It’s limited by how fast you can deploy it. With Inferencing in VideoSDK AI Voice Agents, deployment becomes effortless. Whether through the dashboard or programmatically via the SDK, you can build, select, enable, and go live in minutes.

The era of modular, low-latency, real-time voice agents is here. With Inferencing, your ideas move from concept to conversation faster than ever.

Build. Select. Configure. Go live.

Resources and Next Steps

• For More Information Read the Inference documentation.
• Learn how to deploy your AI Agents.
• Sign up at VideoSDK Dashboard
• 👉 Share your thoughts, roadblocks, or success stories in the comments or join our Discord community ↗. We’re excited to learn from your journey and help you build even better AI-powered communication tools!