> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vogent.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# API Settings

> Manage API keys, webhooks, and concurrency limits

You can configure API access, webhook endpoints, and concurrent phone call limits by visiting the **API** tab in the left sidebar.

## API Keys

Navigate to the **Keys** tab and click **New Key** to create a new API key.

<Warning>
  If you remove a user from your workspace, their API keys will be deactivated as well.
</Warning>

## Webhooks

Configure webhook settings to receive real-time updates about your voice agents' activities. Webhooks allow your application to receive automatic notifications about events like call status changes, transcripts, and recordings.

### Webhook Configuration

1. **Webhook Signing Secret**: A secure key used to verify that incoming webhooks are genuinely from Vogent. Keep this secret secure and use it to validate webhook signatures.

2. **Webhook URL**: The endpoint where Vogent will send webhook events. This should be a publicly accessible HTTPS URL that can receive POST requests.

<Note>
  For detailed information about webhook payloads and event types, visit our [Webhooks documentation](/developers/webhooks).
</Note>

#### Verifying the Webhook Signature

To verify the webhook signature, you need to use the webhook signing secret. The signature is included in the `X-Elto-Signature` header of the webhook request.
Here's an example of how to verify the signature in JavaScript:

```javascript Webhook Signature Verification theme={null}
function verifyWebhook(
  payload,
  signature,
  signingSecret,
  algorithm = 'sha256'
) {
  // Convert payload to buffer if not already
  const buf = Buffer.isBuffer(payload) ? payload : Buffer.from(payload, 'utf8');

  // Convert signature from hex string to buffer
  const sig = Buffer.from(signature, 'hex');

  // Create HMAC with secret
  const hmac = crypto.createHmac(algorithm, signingSecret);

  // Calculate digest of payload
  const digest = Buffer.from(hmac.update(buf).digest('hex'), 'hex');

  // Compare calculated digest with provided signature
  if (sig.length !== digest.length || !crypto.timingSafeEqual(digest, sig)) {
    throw new Error('Invalid webhook signature');
  }

  return true;
}
```

## Concurrent Dial Limits

Control how many simultaneous phone calls your agents can handle.

* View your current concurrent dial limit
* Monitor current usage ("Currently using X")
* Request an increase if you need to handle more concurrent calls

<Warning>
  Reaching your concurrent dial limit will prevent new calls from being initiated until active calls are completed.
</Warning>

### Requesting a Limit Increase

Click the **Request Increase** button to submit a request for a higher concurrent dial limit. Our team will review your request and respond ASAP.