External Tools

External Tools are HTTP webhooks you configure: the voice agent invokes them in real time to fetch data or trigger actions in your systems (CRM, business software, custom automations).

What they are

An External Tool is a function that lives on your server. yourang.ai registers it as an available tool for the AI agent: when the model decides that action is needed (e.g. look up a customer in the CRM, check room availability), it sends an HTTP request to the URL you configured.

How to configure

1. 1

   Open the agent tools panel

   Go to /ai-agents → select the agent → Tools tab → External tools.

2. 2

   Set name and description

   The internal name (tool_name) is a technical identifier (e.g. lookup_customer). The description tells the AI when to use the tool: keep it clear, concrete, focused on user intent.

3. 3

   Set up the webhook

   HTTPS URL that will receive the calls, method (GET/POST/PUT), parameter schema (JSON Schema) that the AI will pass to the payload.

4. 4

   Configure authentication

   None, Bearer token, API key in a header, Basic auth, or multiple custom headers. Credentials are encrypted at rest.

5. 5

   Test with a trial call

   Start the agent in playground and ask something that should trigger the tool. The call log shows request, response and timings.

Authentication

None

Public endpoint, no headers. Not recommended in production.

API key

Sent in your chosen HTTP header (e.g. X-API-Key).

Bearer

Authorization: Bearer <token> header.

Basic

Authorization: Basic <base64(user:pass)>.

Custom header

One or more arbitrary headers (e.g. X-Tenant, X-Signature).

When to use them

• CRM lookup. The agent searches a customer by phone number and tailors the answer with their data.
• Business system availability. The agent asks the PMS whether there are free rooms on a given date.
• Ticket creation. The agent logs a complaint as a ticket in your customer-care system.
• Order update. The agent changes the status of an order already handled in your e-commerce.

Example request

{
 "phone": "+1 415 555 0142",
 "call_id": "cl_abc123",
 "organization_id": "org_xyz"
}

# Expected response (200 OK):
{
 "found": true,
 "customer": {
 "name": "Jane Doe",
 "tier": "gold",
 "last_order_date": "2026-03-12"
 }
}