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Core Concepts

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Assistants

An Assistant is your AI voice agent. It combines:

• An LLM (the brain — GPT-4o, Llama, Claude, etc.)
• A Voice (TTS — how it sounds)
• A Transcriber (STT — how it hears)
• A System Prompt (personality and instructions)
• A Language Wrapper (optional — for African language support)

Assistants start as drafts and become published when synced to the voice engine.

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Phone Numbers

Phone numbers are how callers reach your assistant. They come from a pre-configured admin pool and are purchased with credits. A phone number can be linked to one assistant (or one squad) at a time.

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Linking

Linking connects a published assistant to an active phone number. When linked:

• Incoming calls to that number route to your assistant
• A SIP endpoint is created behind the scenes
• The assistant handles the call end-to-end

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Language Wrappers

Language wrappers are pre-built prompt prefixes that instruct your assistant to respond in a specific African language. They handle:

• Language preference
• Noisy transcription recovery
• Code-switching (when callers switch languages)
• Speech-friendly output

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Squads

A Squad groups multiple assistants together for complex call flows. Squads support:

• Sequential routing — assistants handle calls in order
• Parallel routing — multiple assistants available simultaneously
• Conditional routing — route based on caller intent

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Publishing

Publishing syncs your assistant configuration to the voice AI engine (Vapi). Only published assistants can receive calls.

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Credits

Credits are your account balance used for:

• Phone number purchases (one-time buy fee + monthly fee)
• Per-minute call usage
• All costs are shown in your local currency

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Organization

Your organization is the billing and access boundary. All assistants, phone numbers, and squads belong to an organization.