Managed Agents at Previously $0.06 $0.03/minManaged Agents are Previously $0.06 $0.03/min.
Automation

Make.com AI voice agents that run a scenario from a call

The agent calls a Make custom webhook as a tool during the call and reads back what the scenario returns, or Cartesia sends it the finished call.

Start buildingRead the docs

Request intake agent

Collects requests and starts a scenario.

Instructions

Ask what the caller needs, collect name and phone, send the request to the scenario, and read back the reference it returns. Transfer to the office line if the caller asks for a person.

Handoff
Office

Connected tools

  • Start scenarioWebhook
  • Transfer to officeTransfer

What a Make AI voice agent can do

Open one to watch a call. The grey lines are the tools the agent calls mid-sentence.

Make's routers send urgent requests down one path and routine ones down another, inside the same scenario the tool calls.

Tool definitions

Webhook tools go to POST /v1/agents/tools. Transfers are a system tool on the agent. Replace the placeholder values in capitals with your own.

Webhook

Start scenario

Posts the request to a custom webhook.

Show the JSON definition
start_scenario
{
  "type": "webhook",
  "name": "start_scenario",
  "description": "Sends the caller's request to the automation.",
  "pre_tool_speech": "auto",
  "execution_mode": "immediate",
  "response_timeout_secs": 20,
  "api_schema": {
    "url": "https://hook.YOUR_REGION.make.com/YOUR_WEBHOOK_KEY",
    "method": "POST",
    "request_body_schema": {
      "type": "object",
      "properties": {
        "name": {
          "type": "string",
          "description": "Caller's name."
        },
        "phone": {
          "type": "string",
          "dynamic_variable": "system__caller_id"
        },
        "request": {
          "type": "string",
          "description": "What the caller needs."
        }
      },
      "required": [
        "name",
        "request"
      ]
    }
  }
}

Transfer

Transfer to office

Cold transfer to your office.

Show the JSON definition
transfer_to_office
{
  "config": {
    "system_tools": {
      "transfer_to_number": {
        "description": null,
        "pre_tool_speech": "auto",
        "transfers": [
          {
            "destination": {
              "type": "phone",
              "phone_number": "+14155550123"
            },
            "condition": "The caller asks for a person."
          }
        ]
      }
    }
  }
}

Set it up

Through Make's custom webhook module. The agent has no Make-specific app. A webhook tool posts to your scenario's URL. Vendor details read in October 2026.

  1. Create a scenario with a custom webhook

    Add the Webhooks module's Custom webhook as the trigger and copy its address.

  2. Add the webhook tool

    Paste the address and define the fields.

  3. Add a response

    Use a Webhook response module if the agent should read something back.

  4. Run once and map the fields

    Make learns the data structure from the first call.

Documentation

Before you build

Respond in time

The tool times out after 20 seconds by default. Keep the scenario's response path short, or set execution_mode to async so the turn doesn't wait.

Secrets in URLs

Make's webhook address contains a key. Treat the tool definition, which holds that address, as a secret.

Use cases for teams on Make

SDR and lead qualification

Call new leads within minutes, qualify them on your criteria, and book meetings with your reps.

See the use case

Customer support

Resolve support calls on the first try, refund and credit within your rules, and keep customers who call to cancel.

See the use case

More integrations

All integrations
Automation

n8n

Call an n8n workflow from a voice agent through a webhook node, and run it on your own server.

  • Managed Agents
See the integration
Automation

Zapier

Send a voice agent's calls and tool requests to Zapier through a catch hook, then reach the apps Zapier connects to.

  • Managed Agents
See the integration
Webhook tool

Airtable

Log each call or lead as an Airtable record with a webhook tool that calls the Web API with a personal access token.

  • Managed Agents
See the integration

Enterprise-grade security

  • HIPAA compliant badge

    HIPAA compliant

  • SOC 2 Type 2 badge

    SOC 2 Type 2

  • GDPR badge

    GDPR

Make AI voice agent FAQs

How do I connect an AI voice agent to Make.com?

Start a scenario with Make's custom webhook module and paste its address into a Cartesia webhook tool. The agent posts the caller's details to the scenario during the call, and Make learns the data structure from the first run. There is no Cartesia module in Make.

Can a Make scenario answer the agent during the call?

Yes. Add a webhook response module, and the value it returns, such as a reference number, is what the agent reads to the caller. The tool times out after 20 seconds by default, so keep the path to the response short.

Can I run the scenario without waiting?

Yes. Set the tool's execution_mode to async when the agent does not need an answer. Cartesia runs an async tool separately, so the current turn can finish without waiting on the scenario.

Is the Make webhook address a secret?

Yes. Make's webhook address contains a key, so anyone with it can start your scenario. Treat the Cartesia tool definition that holds the address as a secret too. If it leaks, create a new webhook in Make and update the tool.

Who bills what on a Make setup?

Cartesia bills the call and Make bills the scenario. Agents run at $0.03/min, plus LLM usage and telephony, and the scenario's usage counts against your Make plan, including any post-call scenario that call events start.

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