Skill

create-squad

Name: create-squad
Author: Vapi

create multi-assistant voice agent squads

Published by Vapi Updated Jul 20

Covers Agents Voice Multi-Agent

Description

Create multi-assistant squads in Vapi with handoffs between specialized voice agents. Use when building complex voice workflows that need multiple assistants with different roles, like triage-to-booking or sales-to-support handoffs.

SKILL.md

Vapi Squad Creation

Create squads that orchestrate multiple specialized assistants with context-preserving handoffs. Break complex workflows into focused assistants that transfer calls between each other.

Setup: Ensure VAPI_API_KEY is set. See the setup-api-key skill if needed.

Why Squads?

Single assistants with large prompts cause higher hallucination rates, increased costs, and greater latency. Squads solve this by creating focused assistants with specific roles:

Triage → Booking → Confirmation
Sales → Technical Support → Billing
Receptionist → Department Specialist

Quick Start

cURL

curl -X POST https://api.vapi.ai/squad \
  -H "Authorization: Bearer $VAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Support Squad",
    "members": [
      {
        "assistant": {
          "name": "Receptionist",
          "firstMessage": "Hello! How can I direct your call today?",
          "model": {
            "provider": "openai",
            "model": "gpt-4.1",
            "messages": [
              {
                "role": "system",
                "content": "You are a receptionist. Determine if the caller needs sales or support, then transfer them to the right department."
              }
            ],
            "tools": [
              {
                "type": "handoff",
                "destinations": [
                  {
                    "type": "assistant",
                    "assistantId": "sales-assistant-id",
                    "description": "Transfer when the caller asks about pricing, plans, or wants to purchase"
                  },
                  {
                    "type": "assistant",
                    "assistantId": "support-assistant-id",
                    "description": "Transfer when the caller has a technical issue or needs help"
                  }
                ]
              }
            ]
          },
          "voice": { "provider": "vapi", "voiceId": "Lily", "version": 2 },
          "transcriber": { "provider": "deepgram", "model": "nova-3", "language": "en" }
        }
      },
      {
        "assistantId": "sales-assistant-id"
      },
      {
        "assistantId": "support-assistant-id"
      }
    ]
  }'

TypeScript (Server SDK)

import { VapiClient } from "@vapi-ai/server-sdk";

const vapi = new VapiClient({ token: process.env.VAPI_API_KEY! });

const squad = await vapi.squads.create({
  name: "Support Squad",
  members: [
    {
      assistant: {
        name: "Receptionist",
        firstMessage: "Hello! How can I direct your call today?",
        model: {
          provider: "openai",
          model: "gpt-4.1",
          messages: [
            {
              role: "system",
              content:
                "You are a receptionist. Determine if the caller needs sales or support, then transfer them.",
            },
          ],
          tools: [
            {
              type: "handoff",
              destinations: [
                {
                  type: "assistant",
                  assistantId: "sales-assistant-id",
                  description: "Transfer for pricing and purchasing questions",
                },
                {
                  type: "assistant",
                  assistantId: "support-assistant-id",
                  description: "Transfer for technical issues",
                },
              ],
            },
          ],
        },
        voice: { provider: "vapi", voiceId: "Lily" },
        transcriber: { provider: "deepgram", model: "nova-3", language: "en" },
      },
    },
    { assistantId: "sales-assistant-id" },
    { assistantId: "support-assistant-id" },
  ],
});

console.log("Squad created:", squad.id);

Squad Structure

Members

The first member in the array starts the call. Each member is either:

Transient — Defined inline with assistant: { ... }
Persistent — References a saved assistant via assistantId: "..."

{
  "members": [
    { "assistant": { "name": "Inline Assistant", "..." : "..." } },
    { "assistantId": "saved-assistant-id" }
  ]
}

Handoff Tools

Handoff tools define how assistants transfer between each other:

{
  "type": "handoff",
  "destinations": [
    {
      "type": "assistant",
      "assistantId": "target-assistant-id",
      "description": "Clear description of WHEN to transfer. Be specific about trigger conditions."
    }
  ],
  "function": {
    "name": "handoff_to_sales"
  }
}

Assistant Overrides

Override saved assistant settings within the squad context without modifying the original:

{
  "assistantId": "saved-assistant-id",
  "assistantOverrides": {
    "voice": { "provider": "vapi", "voiceId": "Elliot", "version": 2 },
    "firstMessage": "Overridden greeting for this squad"
  }
}

Appending Tools via Overrides

Add squad-specific tools to a saved assistant:

{
  "assistantId": "saved-assistant-id",
  "assistantOverrides": {
    "tools:append": [
      {
        "type": "handoff",
        "destinations": [
          {
            "type": "assistant",
            "assistantId": "another-assistant-id",
            "description": "Transfer when customer needs billing help"
          }
        ],
        "function": { "name": "handoff_to_billing" }
      }
    ]
  }
}

Members Overrides

Apply configuration to ALL members simultaneously:

{
  "members": [
    { "assistant": { "name": "Agent A", "..." : "..." } },
    { "assistantId": "agent-b-id" }
  ],
  "membersOverrides": {
    "voice": { "provider": "vapi", "voiceId": "Elliot", "version": 2 },
    "transcriber": { "provider": "deepgram", "model": "nova-3", "language": "en" }
  }
}

Using Squads in Calls

Outbound call with a squad

curl -X POST https://api.vapi.ai/call \
  -H "Authorization: Bearer $VAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "squadId": "your-squad-id",
    "phoneNumberId": "your-phone-number-id",
    "customer": {
      "number": "+11234567890"
    }
  }'

Transient squad in a call

{
  "squad": {
    "members": [
      { "assistant": { "..." : "..." } },
      { "assistantId": "..." }
    ]
  },
  "phoneNumberId": "phone-number-id",
  "customer": { "number": "+11234567890" }
}

Common Patterns

Clinic Triage → Scheduling

{
  "name": "Clinic Squad",
  "members": [
    {
      "assistant": {
        "name": "Triage Nurse",
        "firstMessage": "Hello, this is the clinic. How can I help you today?",
        "model": {
          "provider": "openai",
          "model": "gpt-4.1",
          "messages": [
            {
              "role": "system",
              "content": "You are a clinic triage assistant. Assess the caller's needs: if they need an appointment, transfer to scheduling. If it's urgent, transfer to the nurse line."
            }
          ],
          "tools": [
            {
              "type": "handoff",
              "destinations": [
                {
                  "type": "assistant",
                  "assistantId": "scheduling-assistant-id",
                  "description": "Transfer when caller wants to book, reschedule, or cancel an appointment"
                },
                {
                  "type": "assistant",
                  "assistantId": "nurse-assistant-id",
                  "description": "Transfer for urgent medical questions or symptoms"
                }
              ]
            }
          ]
        },
        "voice": { "provider": "vapi", "voiceId": "Lily", "version": 2 }
      }
    },
    { "assistantId": "scheduling-assistant-id" },
    { "assistantId": "nurse-assistant-id" }
  ]
}

E-commerce: Sales → Support → Returns

{
  "name": "E-commerce Squad",
  "members": [
    {
      "assistant": {
        "name": "Sales Agent",
        "firstMessage": "Welcome to our store! Are you looking to make a purchase today?",
        "model": {
          "provider": "openai",
          "model": "gpt-4.1",
          "messages": [
            { "role": "system", "content": "You are a sales assistant. Help customers find products and make purchases. Transfer to support for order issues or returns." }
          ],
          "tools": [
            {
              "type": "handoff",
              "destinations": [
                { "type": "assistant", "assistantId": "support-id", "description": "Transfer for order status, shipping, or account issues" },
                { "type": "assistant", "assistantId": "returns-id", "description": "Transfer for returns, refunds, or exchanges" }
              ]
            }
          ]
        }
      }
    },
    { "assistantId": "support-id" },
    { "assistantId": "returns-id" }
  ]
}

Best Practices

Keep assistants focused — Each assistant should have 1-3 goals maximum
Minimize squad size — Split only when there's a clear functional boundary
Write specific handoff descriptions — The LLM uses these to decide when to transfer
Mention handoffs in system prompts — Tell each assistant what departments exist
Use member overrides — Apply consistent voice and transcriber settings across the squad

Managing Squads

# List squads
curl https://api.vapi.ai/squad -H "Authorization: Bearer $VAPI_API_KEY"

# Get a squad
curl https://api.vapi.ai/squad/{id} -H "Authorization: Bearer $VAPI_API_KEY"

# Update a squad
curl -X PATCH https://api.vapi.ai/squad/{id} \
  -H "Authorization: Bearer $VAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Updated Squad Name",
    "members": [
      { "assistantId": "first-assistant-id" },
      { "assistantId": "second-assistant-id" }
    ]
  }'

# Delete a squad
curl -X DELETE https://api.vapi.ai/squad/{id} \
  -H "Authorization: Bearer $VAPI_API_KEY"

The update API requires the complete members array. Retrieve the current squad first and preserve every member when changing its name or overrides.

References

Vapi Squads Docs — Official documentation
Squad Examples — More patterns
Handoff Configuration — Detailed handoff guide

Additional Resources

Vapi provides a documentation MCP server that gives compatible AI agents access to the Vapi knowledge base. Use its documentation search for advanced configuration, troubleshooting, SDK details, and anything beyond this skill.

Manual setup: If your agent doesn't auto-detect the config, run:

claude mcp add vapi-docs -- npx -y mcp-remote https://docs.vapi.ai/_mcp/server

See the Vapi MCP integration guide for setup instructions across supported agents.

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