> For complete lifecycle-event payload schemas and examples, use the canonical overview: Session /api/sessions; Room lifecycle, members, and room playback /api/rooms; Session playback /api/playback; Recording /api/recording; DTMF /api/keypad-input; Messages /api/messages; WebSocket Session /api/web-socket. Use /api/event-delivery for transport behavior. Endpoint pages name relevant events, but these overviews are the canonical references.

# Answer a call

POST https://api.telekesher.dev/v1/sessions/{uuid}/answer
Content-Type: application/json

Answer an incoming call. A `202 Accepted` response
confirms only that the command was admitted; it does not confirm that the
call was answered. The `session.answered` webhook confirms completion. If
the call ends before it is answered, `session.ended` reports `answered: false`.

**Triggered webhooks:** `session.answered`

See [Session lifecycle events](/api/sessions#lifecycle-events) for complete payload schemas and examples.

Reference: https://docs.vorbal.dev/api/sessions/answer

## Authentication

- `Authorization` header (bearer token, required) — Application auth. Send `Authorization: Bearer <app_uuid>:<api_key>` using any active key in the app's collection. See [Authentication](https://voice-platform.docs.buildwithfern.com/api/authentication) for details.

## Request

### Path parameters

- `uuid` (string, required) — [Session](/api/sessions) identifier.

### Headers

- `Idempotency-Key` (string, optional) — Optional key for safely retrying mutating requests. See [Idempotency](https://voice-platform.docs.buildwithfern.com/idempotency) for details.
- `Operation-Id` (string, optional) — optional client-supplied lowercase RFC-4122 v4 UUID returned as operation_uuid; platform generates one when omitted; correlation metadata distinct from Idempotency-Key.

## Response

### 202

Command accepted for async execution

- `operation_uuid` (string, required)
- `status` (enum, required)
  - Allowed values: `in_progress`, `completed`
- `already_ended` (true, optional) — Optional. Set to `true` on idempotent terminal commands when the session was already in a terminal state at the time the request was received. Absent otherwise.

## Examples

**Request**

```json
{}
```

**Response**

```json
{
  "operation_uuid": "550e8400-e29b-41d4-a716-446655440000",
  "status": "in_progress"
}
```

**SDK Code**

```python Sessions & Calls_answerACall_example
import requests

url = "https://api.telekesher.dev/v1/sessions/uuid/answer"

payload = {}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript Sessions & Calls_answerACall_example
const url = 'https://api.telekesher.dev/v1/sessions/uuid/answer';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go Sessions & Calls_answerACall_example
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.telekesher.dev/v1/sessions/uuid/answer"

	payload := strings.NewReader("{}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby Sessions & Calls_answerACall_example
require 'uri'
require 'net/http'

url = URI("https://api.telekesher.dev/v1/sessions/uuid/answer")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{}"

response = http.request(request)
puts response.read_body
```

```java Sessions & Calls_answerACall_example
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.telekesher.dev/v1/sessions/uuid/answer")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{}")
  .asString();
```

```php Sessions & Calls_answerACall_example
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.telekesher.dev/v1/sessions/uuid/answer', [
  'body' => '{}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp Sessions & Calls_answerACall_example
using RestSharp;

var client = new RestClient("https://api.telekesher.dev/v1/sessions/uuid/answer");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Sessions & Calls_answerACall_example
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.telekesher.dev/v1/sessions/uuid/answer")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```