import Retell from 'retell-sdk';

const client = new Retell({
  apiKey: 'YOUR_RETELL_API_KEY',
});

const conversationFlowResponse = await client.conversationFlow.create({
  model_choice: { model: 'gpt-5', type: 'cascading' },
  nodes: [
    {
      id: 'start',
      instruction: { text: 'Greet the customer and ask how you can help them.', type: 'prompt' },
      type: 'conversation',
    },
  ],
  start_speaker: 'agent',
});

console.log(conversationFlowResponse.conversation_flow_id);

{
  "global_prompt": "You are a helpful customer service agent.",
  "tools": [
    {
      "type": "custom",
      "name": "get_customer_info",
      "description": "Get customer information from database",
      "tool_id": "tool_001",
      "url": "https://api.example.com/customer",
      "method": "GET"
    }
  ],
  "components": [
    {
      "name": "Customer Information Collector",
      "tools": [
        {
          "type": "custom",
          "name": "get_customer_info",
          "description": "Get customer information from database",
          "tool_id": "tool_001",
          "url": "https://api.example.com/customer",
          "method": "GET"
        }
      ],
      "nodes": [
        {
          "id": "collect_info",
          "type": "conversation",
          "instruction": {
            "type": "prompt",
            "text": "Ask the customer for their name and contact information."
          }
        }
      ],
      "start_node_id": "collect_info",
      "begin_tag_display_position": {
        "x": 100,
        "y": 200
      }
    }
  ],
  "start_node_id": "start",
  "model_temperature": 0.7,
  "tool_call_strict_mode": true,
  "default_dynamic_variables": {
    "company_name": "Retell Inc",
    "support_hours": "9 AM - 5 PM"
  },
  "knowledge_base_ids": [
    "kb_001",
    "kb_002"
  ],
  "kb_config": {
    "top_k": 3,
    "filter_score": 0.6
  },
  "begin_tag_display_position": {
    "x": 100,
    "y": 200
  },
  "mcps": [
    {
      "name": "<string>",
      "url": "<string>",
      "headers": {
        "Authorization": "Bearer 1234567890"
      },
      "query_params": {
        "index": "1",
        "key": "value"
      },
      "timeout_ms": 123
    }
  ],
  "start_speaker": "agent",
  "begin_after_user_silence_ms": 2000,
  "model_choice": {
    "type": "<any>",
    "model": "<any>",
    "high_priority": "<any>"
  },
  "nodes": [
    {
      "id": "start",
      "type": "conversation",
      "instruction": {
        "type": "prompt",
        "text": "Greet the customer and ask how you can help them."
      },
      "edges": [
        {
          "id": "edge_1",
          "transition_condition": {
            "type": "prompt",
            "prompt": "Customer wants to book appointment"
          },
          "destination_node_id": "book_appointment"
        }
      ]
    }
  ],
  "conversation_flow_id": "<string>",
  "version": 123
}