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What is Function Calling?

Function calling enables your AI agents to execute real-time actions during conversations by calling external APIs and triggering workflows.

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Capabilities

API Integration

Connect to external APIs and services

Function Examples

Ready-to-use function examples for common use cases

Best Practices

Tips for reliable and secure function calling

Testing Functions

How to test and debug custom functions

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How It Works

1

AI Reads Function

The AI understands what the function does from its description
2

Detects Trigger

Based on conversation, AI decides when to call the function
3

Extracts Parameters

AI collects required parameters from the conversation
4

Executes API Call

Dialgen makes the HTTP request to your endpoint
5

Returns Response

API response feeds back to AI for natural continuation

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Quick Example

{
  "name": "check_order_status",
  "description": "Checks the customer's order status. Call this when the customer asks about their order, delivery, or tracking.",
  "parameters": {
    "type": "object",
    "properties": {
      "order_id": {
        "type": "string",
        "description": "The order number"
      }
    },
    "required": ["order_id"]
  },
  "api_endpoint": "https://api.yourcompany.com/orders/status",
  "http_method": "POST"
}
The description is critical. The AI relies on it to know when to trigger the function.

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Use Cases

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CRM Integration

Update customer records, add notes, change lead status.

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Appointment Booking

Check availability and book appointments in real-time.

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Order Management

Check order status, process returns, track shipments.

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Payment Processing

Process payments, check balances, send invoices.

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Data Retrieval

Fetch customer data, account information, product details.

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Next Steps

API Integration

Learn how to integrate external APIs

Examples

View ready-to-use function examples