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What Is an AI Call Agent

An AI Call Agent is an intelligent voice assistant that can talk, listen, and act like a trained human representative. It answers or initiates calls automatically — greeting callers, understanding intent, booking meetings, or transferring them to a real person when needed. These agents handle real conversations 24/7, reducing missed calls and freeing your team from repetitive phone work. They sound natural, follow instructions, and can operate across multiple languages and time zones.

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Basic vs. Enhanced Agents

In Callin, there are two levels of agents depending on your needs:
  • Basic Agent – fast to set up, ideal for greetings, FAQs, and capturing basic details. Lower cost and minimal configuration.
  • Enhanced Agent – powered by advanced LLMs for deeper reasoning, multi-step flows, data extraction, and integrations.
You can start with a Basic Agent and later upgrade to Enhanced without starting from scratch.

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Connecting a Phone Number

Every agent needs a phone number to make or receive calls. You have several options:
  • Buy a new number directly through Twilio within your Callin workspace.
  • Import an existing number from Telnyx or another provider.
  • Connect your current business number if you already have one assigned.
Learn more in Configure Numbers. Once your number is active, your AI agent will use it just like a real phone line—complete with caller ID, voicemail detection, and call history.

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Understanding Call Usage and Costs

Each call consumes two different types of minutes:
  1. Carrier minutes – charged by Twilio or your external provider for the actual phone connection.
  2. Callin AI minutes – cover the computation and LLM usage while the agent listens, processes, and responds.
Example:
A 5-minute conversation = 5 Twilio minutes + 5 Callin AI minutes. Longer calls or agents using advanced LLM reasoning may consume slightly more AI minutes, but they allow richer, more human-like dialogue. You can track both costs in your Callin Dashboard → Usage section.

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Integrations and Webhooks

Your AI Call Agent doesn’t have to work alone. It can connect to the tools you already use for scheduling, CRM, and automation. This is done through webhooks — simple URLs that receive data from each call in real time. A webhook sends structured information such as caller details, extracted entities, timestamps, or transcripts to any system that can receive HTTP requests.

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Why It Matters

Webhooks open the door to thousands of integrations:
  • Make (Integromat) – build automated workflows without code.
  • Zapier – instantly connect Callin with Google Sheets, Slack, HubSpot, and more.
  • n8n – create custom logic flows in an open-source environment.
  • GoHighLevel – sync leads, calls, and transcripts directly into your CRM.
Example use cases:
  • Send a Slack message after every missed call.
  • Create a new CRM lead with caller info and transcript.
  • Trigger a follow-up email when an appointment is booked.
Webhooks are the bridge between Callin and your ecosystem—simple, flexible, and powerful.

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What to Do Next

Now that you understand what AI Call Agents are, how they connect to phone numbers, how minutes and costs work, and how integrations can expand their power, you’re ready to start. Create your first agent here: Create Agent Experiment with a Basic setup, explore Enhanced later, and watch your AI agent handle real conversations for you.