---
title: "API Trigger"
description: "API Trigger helps you trigger your Voice Agent using external systems, like N8n or Zapier"
---

### API Payload 
The API Trigger is a POST request, which requires an [API Key](../configurations/api-keys). It expects a valid JSON with `phone_number` and `initial_context`. 

### Initial Context
`initial_context` is a valid JSON object, which contains any contextual information that you would want your voice agent to access. You can refer to these values in your prompts using **Handle Bars**, which are values enclosed in `{{` and `}}`. 

Example: If you have below JSON as your `initial_context`
```
{
    "initial_context": {
        "user": {
            "name": "John"
        }
    }
}
```

you can refer to the user name in your prompts as `{{initial_context.user.name}}`.