> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://developer.jelliu.co/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://developer.jelliu.co/_mcp/server.

# Send a test event

POST https://api.jelliu.co/api/webhooks/{webhookId}/test
Content-Type: application/json

Sends one signed delivery to the endpoint immediately and returns the result of that attempt.
Without a body (or with `{}`), it sends `webhook.test`, whose `data` is
`{ "message": "Este es un evento de prueba de Jelliu.", "webhook_id": "<this endpoint>" }`. With
`{ "type": "<event type>" }`, it sends that type with the catalog's example `data`, to exercise the
handler for a specific event. The request is signed and structured exactly like a real delivery
(same headers, same envelope, a new `evt_` id).

The test also works on a disabled endpoint, so the endpoint can be verified before it is
re-enabled. It is a single attempt (a failure is not retried), appears in the delivery log with
`manual: true`, and does not affect endpoint health. Test events are never re-sent by
`POST /api/webhooks/{webhookId}/replay`.

The response is `200` regardless of the endpoint's response; check `success`, `status_code` and `error`.

**Side effects.** One HTTP request to the endpoint (10-second timeout) and one delivery record in its log.

**Idempotency.** Not idempotent: every call sends a new test event with a new id.

**Access**

* **Required scope:** `full`. Human users need the owner or admin role.
* **Rate limit:** General API (120–600 requests/min per workspace, by plan) plus the configuration-mutations limit — 10 requests/min per workspace, shared with other configuration changes. See [Rate limits](/rate-limits).
* **Plan:** Requires an active subscription (`active`, `trialing` or `past_due`); without one the request is refused with `403 BILLING_ERROR` (`metadata.kind: subscription_required`). See [Billing and usage](/platform/billing-and-usage#without-an-active-subscription).

Reference: https://developer.jelliu.co/api-reference/webhooks/post-webhooks-by-webhook-id-test

## Authentication

- `Authorization` header (bearer token, required) — Workspace API key: `jl_` followed by 64 lowercase hex characters, created by the workspace owner in the dashboard (**Settings → API Keys**) and sent as `Authorization: Bearer jl_...`. The plaintext is shown once, at creation; Jelliu stores only a SHA-256 hash. A workspace can hold up to 25 active keys. | Scope | GET / HEAD | POST / PUT / PATCH / DELETE | Admin-only routes | | --- | --- | --- | --- | | `read` | Yes | No | No | | `write` | Yes | Yes | No | | `full` | Yes | Yes | Yes | Operations restricted to admins or owners reject keys without the `full` scope with `403`, and say so in their description. No key, whatever its scope, can mint or revoke API keys or rotate a webhook secret — that requires a signed-in owner session. A revoked key stops authenticating within about 10 seconds. See [Authentication](/authentication).

## Request

### Path parameters

- `webhookId` (string, required) — UUID of the outbound webhook endpoint, returned as `id` by `GET /api/webhooks`. It must belong to the authenticated workspace; an id from another workspace, an unknown id or a value that is not a UUID answers `404`.

### Body (application/json)

This endpoint expects an object.

- `type` (string, optional) — Event type to send with its catalog example `data`. Defaults to `webhook.test`. Must be a type that is available now (see `GET /api/webhooks/event-types`).

## Response

### 200

The attempt was made. `success` indicates whether the endpoint returned `2xx`.

- `data` (WebhookTestResult, required) — Result of the single attempt made by `POST /api/webhooks/{webhookId}/test`.

## Errors

### 400 Bad Request Error

The body is not valid, or `type` is not an available event type.

- `error` (ErrorResponseError, required) — The error object. Always has `code` and `message`.

### 401 Unauthorized Error

No usable credential. Either the `Authorization` header is missing or is not a well-formed `Bearer jl_…` key, or the key is unknown, revoked or expired. Do not retry with the same key. See [Authentication](/authentication#401-unauthorized).

- `error` (ErrorResponseError, required) — The error object. Always has `code` and `message`.

### 403 Forbidden Error

Role below admin, an API key without the `full` scope, or a suspended workspace. Without an active subscription the request is refused with `BILLING_ERROR` and `metadata.kind` = `subscription_required`.

- `error` (ErrorResponseError, required) — The error object. Always has `code` and `message`.

### 404 Not Found Error

No webhook with this id in the workspace, it was deleted, or `webhookId` is not a UUID.

- `error` (ErrorResponseError, required) — The error object. Always has `code` and `message`.

### 429 Too Many Requests Error

The configuration-mutations limit (10/min) or the general API limit was exceeded.

- `error` (ErrorResponseError, required) — The error object. Always has `code` and `message`.

## Types

### WebhookTestResult

Result of the single attempt made by `POST /api/webhooks/{webhookId}/test`.

- `delivery_id` (string, required) — Id of the delivery row written for the test (it appears in the delivery log with `manual: true`).
- `success` (boolean, required) — `true` when the endpoint returned `2xx`.
- `status_code` (integer, required, nullable) — HTTP status returned by the endpoint; `null` when there was no response.
- `duration_ms` (integer, required, nullable)
- `error` (string, required, nullable) — Machine code of the failure (`timeout`, `http_404`, `connection_error:ECONNREFUSED`, …), `null` on success.
- `response_snippet` (string, required, nullable) — The first 1 KB of the endpoint's response body.

### ErrorResponseError

The error object. Always has `code` and `message`.

- `code` (string, required) — Stable machine-readable error code (for example `VALIDATION_FAILED`, `PAYLOAD_TOO_LARGE`, `UNAUTHORIZED`, `FORBIDDEN`, `NOT_FOUND`, `BILLING_ERROR`, `COMPLIANCE_BLOCKED`, `RATE_LIMIT_EXCEEDED`, `INTERNAL_ERROR`). Switch on this, not on `message`. See [Errors](/errors).
- `message` (string, required) — Human-readable explanation. English or Spanish depending on the route; may change without notice.
- `details` (ErrorResponseErrorDetails, optional) — Present on `VALIDATION_FAILED` only. Its shape depends on how the route validates: * a field map, either Zod's `flatten()` output (`{ "formErrors": [], "fieldErrors": { "name": ["..."] } }`) or just its `fieldErrors` part (`{ "name": ["..."] }`); * an issue list, where each issue has at least `path`, `message` and `code`. `path` is a dot-separated string on routes that let the schema throw, and an array of keys on routes that forward Zod's raw issues (those also carry Zod's extra issue fields); * for a rejected multipart upload (file in an unexpected field, too many files), a list with the upload error `code` (for example `LIMIT_UNEXPECTED_FILE`) and the `field` name. Absent when the value was rejected outside the route's own validation: a malformed id, number or date the database could not read, or a JSON body that does not parse.
- `metadata` (map from string to any, optional) — Structured detail exposed for a small allowlist of codes only — for example `BILLING_ERROR` carries `limit`, `current` and `tier` (resource caps), `tier` alone (feature gates), or `tier` = `none` with `kind` = `subscription_required` when the workspace has no active subscription. See [Errors](/errors).

### ErrorResponseErrorDetails

Present on `VALIDATION_FAILED` only. Its shape depends on how the route validates: * a field map, either Zod's `flatten()` output (`{ "formErrors": [], "fieldErrors": { "name": ["..."] } }`) or just its `fieldErrors` part (`{ "name": ["..."] }`); * an issue list, where each issue has at least `path`, `message` and `code`. `path` is a dot-separated string on routes that let the schema throw, and an array of keys on routes that forward Zod's raw issues (those also carry Zod's extra issue fields); * for a rejected multipart upload (file in an unexpected field, too many files), a list with the upload error `code` (for example `LIMIT_UNEXPECTED_FILE`) and the `field` name. Absent when the value was rejected outside the route's own validation: a malformed id, number or date the database could not read, or a JSON body that does not parse.

- Field map: Field map
- Issue list: list of ErrorResponseErrorDetailsOneOf1Items

### Field map

- `formErrors` (list of string, optional)
- `fieldErrors` (map from string to list of string, optional)

### ErrorResponseErrorDetailsOneOf1Items

- `path` (ErrorResponseErrorDetailsOneOf1ItemsPath, optional) — Dot-separated string, or an array of keys.
- `message` (string, optional)
- `code` (string, optional) — Zod issue code, for example `invalid_type`.

### ErrorResponseErrorDetailsOneOf1ItemsPath

Dot-separated string, or an array of keys.

- string
- list of ErrorResponseErrorDetailsOneOf1ItemsPathOneOf1Items

### ErrorResponseErrorDetailsOneOf1ItemsPathOneOf1Items

- string
- integer

## Examples

### The endpoint returned 200

**Response**

```json
{
  "data": {
    "delivery_id": "dlv_01K6B3X0R2A5C8E1G4J7K0M3N6",
    "success": true,
    "status_code": 200,
    "duration_ms": 184,
    "error": null,
    "response_snippet": "{\"received\":true}"
  }
}
```

**SDK Code**

```python The endpoint returned 200
import requests

url = "https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test"

headers = {"Authorization": "Bearer <token>"}

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

print(response.json())
```

```javascript The endpoint returned 200
const url = 'https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test';
const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

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

```go The endpoint returned 200
package main

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

func main() {

	url := "https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test"

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

	req.Header.Add("Authorization", "Bearer <token>")

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

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

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

}
```

```ruby The endpoint returned 200
require 'uri'
require 'net/http'

url = URI("https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'

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

```java The endpoint returned 200
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test")
  .header("Authorization", "Bearer <token>")
  .asString();
```

```php The endpoint returned 200
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test', [
  'headers' => [
    'Authorization' => 'Bearer <token>',
  ],
]);

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

```csharp The endpoint returned 200
using RestSharp;

var client = new RestClient("https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
IRestResponse response = client.Execute(request);
```

```swift The endpoint returned 200
import Foundation

let headers = ["Authorization": "Bearer <token>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers

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()
```

### The endpoint timed out

**Response**

```json
{
  "data": {
    "delivery_id": "dlv_01K6B3X0R2A5C8E1G4J7K0M3N7",
    "success": false,
    "status_code": null,
    "duration_ms": 10002,
    "error": "timeout",
    "response_snippet": null
  }
}
```

**SDK Code**

```python The endpoint timed out
import requests

url = "https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test"

headers = {"Authorization": "Bearer <token>"}

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

print(response.json())
```

```javascript The endpoint timed out
const url = 'https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test';
const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

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

```go The endpoint timed out
package main

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

func main() {

	url := "https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test"

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

	req.Header.Add("Authorization", "Bearer <token>")

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

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

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

}
```

```ruby The endpoint timed out
require 'uri'
require 'net/http'

url = URI("https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'

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

```java The endpoint timed out
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test")
  .header("Authorization", "Bearer <token>")
  .asString();
```

```php The endpoint timed out
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test', [
  'headers' => [
    'Authorization' => 'Bearer <token>',
  ],
]);

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

```csharp The endpoint timed out
using RestSharp;

var client = new RestClient("https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
IRestResponse response = client.Execute(request);
```

```swift The endpoint timed out
import Foundation

let headers = ["Authorization": "Bearer <token>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers

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()
```

### The webhook.test event

**Request**

```json
{}
```

**Response**

```json
{
  "data": {
    "delivery_id": "dlv_01K6B3X0R2A5C8E1G4J7K0M3N6",
    "success": true,
    "status_code": 200,
    "duration_ms": 184,
    "error": null,
    "response_snippet": "{\"received\":true}"
  }
}
```

**SDK Code**

```python The webhook.test event
import requests

url = "https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test"

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

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

print(response.json())
```

```javascript The webhook.test event
const url = 'https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test';
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 The webhook.test event
package main

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

func main() {

	url := "https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test"

	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 The webhook.test event
require 'uri'
require 'net/http'

url = URI("https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test")

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 The webhook.test event
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{}")
  .asString();
```

```php The webhook.test event
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test', [
  'body' => '{}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp The webhook.test event
using RestSharp;

var client = new RestClient("https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test");
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 The webhook.test event
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.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test")! 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()
```

### A call.completed with example data

**Request**

```json
{
  "type": "call.completed"
}
```

**Response**

```json
{
  "data": {
    "delivery_id": "dlv_01K6B3X0R2A5C8E1G4J7K0M3N6",
    "success": true,
    "status_code": 200,
    "duration_ms": 184,
    "error": null,
    "response_snippet": "{\"received\":true}"
  }
}
```

**SDK Code**

```python A call.completed with example data
import requests

url = "https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test"

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

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

print(response.json())
```

```javascript A call.completed with example data
const url = 'https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"type":"call.completed"}'
};

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

```go A call.completed with example data
package main

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

func main() {

	url := "https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test"

	payload := strings.NewReader("{\n  \"type\": \"call.completed\"\n}")

	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 A call.completed with example data
require 'uri'
require 'net/http'

url = URI("https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test")

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 = "{\n  \"type\": \"call.completed\"\n}"

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

```java A call.completed with example data
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"type\": \"call.completed\"\n}")
  .asString();
```

```php A call.completed with example data
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test', [
  'body' => '{
  "type": "call.completed"
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp A call.completed with example data
using RestSharp;

var client = new RestClient("https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"type\": \"call.completed\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift A call.completed with example data
import Foundation

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

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.jelliu.co/api/webhooks/9a7b6c5d-4e3f-4a2b-8c1d-0e9f8a7b6c5d/test")! 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()
```