# Extension API

**Provider:** Extension
**Category:** payments
**Base URL:** `https://api.vonage.com/t/vbc.prod/provisioning`
**Auth:** bearer — `Authorization: Bearer YOUR_TOKEN`
**Rate Limit:** Based on plan
**Free Tier:** No
**Pricing:** Enterprise / contact sales (subscription)
**Docs:** https://api.apis.guru/v2/specs/vonage.com:extension/1.11.8.json

## Description

The Vonage Business Cloud Extension API enables you to retrieve information about extensions.

Your application must subscribe to the Provisioning API suite to use this API.

## Endpoints

| Method | Endpoint | Description |
|--------|----------|-------------|
| GET | `https://api.vonage.com/t/vbc.prod/provisioning/api/accounts/{account_id}/extensions` | Get account extensions data by account ID |
| GET | `https://api.vonage.com/t/vbc.prod/provisioning/api/accounts/{account_id}/extensions/{extension_number}` | Get extension data by account ID and extension number |

## Authentication

Bearer token in the Authorization header

```
Authorization: Bearer YOUR_TOKEN
```

## Sample Request

```bash
curl 'https://api.vonage.com/t/vbc.prod/provisioning/api/accounts/{account_id}/extensions' \
  -H 'Authorization: Bearer YOUR_TOKEN'
```

## Sample Response

```json
{}
```

## Pricing Details

Paid. API extension service; pricing varies by provider.

---

*Source: [API Map](https://apimap.dev/apis/extension/) — CC BY 4.0*