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

# Pusher Webhooks

> Develop and test Pusher webhooks from localhost.

This guide walks you through using ngrok to receive Pusher webhooks on your localhost app.

By integrating ngrok with Pusher, you can:

* Develop and test Pusher webhooks locally without deploying to a public environment or setting up HTTPS.
* Inspect and troubleshoot requests from Pusher in real time via the inspection UI and API.
* Modify and replay Pusher webhook requests with a single click instead of reproducing events manually in your Pusher account.
* Secure your app with Pusher webhook validation provided by ngrok.
  Invalid requests are blocked by ngrok before reaching your app.

## What you'll need

* An [ngrok account](https://ngrok.com/signup) and your [authtoken](https://dashboard.ngrok.com/get-started/your-authtoken).
* The [ngrok agent](https://ngrok.com/download) installed.
* [Node.js](https://nodejs.org/) installed (for the sample app, or use your own app).
* A Pusher account.

## 1. Start your app

For this tutorial, you can use the [sample Node.js app on GitHub](https://github.com/ngrok/ngrok-webhook-nodejs-sample).

To install the sample, run the following in a terminal:

```bash theme={null}
git clone https://github.com/ngrok/ngrok-webhook-nodejs-sample.git
cd ngrok-webhook-nodejs-sample
npm install
```

Then start the app:

```bash theme={null}
npm start
```

The app runs on port 3000 by default.

You can confirm it's running by visiting `http://localhost:3000`.
The app logs request headers and body in the terminal and shows a message in the browser.

## 2. Expose your app with ngrok

Once your app is running locally, you're ready to put it online securely using ngrok.

* Copy [your ngrok authtoken](https://dashboard.ngrok.com/get-started/your-authtoken) from the dashboard.

<Tip>
  The ngrok agent uses your authtoken to authenticate when you start a tunnel.
</Tip>

* Start ngrok:

  ```bash theme={null}
  ngrok http 3000
  ```

* Copy the URL ngrok displays.
  Your app is now exposed at that URL for use with Pusher.

## 3. Configure Pusher to send webhooks

Pusher can send webhook requests to your app when events occur in your channel.
To register for those events:

* Sign in to the [Pusher dashboard](https://dashboard.pusher.com/).
* Click your channel name in the **Channels** tile (or create a channel, for example `my-channel`).
* On your channel page, click **Webhooks** and then **Add webhook**.
* On **Add new webhook**, enter your ngrok URL in **Webhook URL** (for example, `https://1a2b-3c4d-5e6f-7g8h-9i0j.ngrok.app`).
* Under **Event type**, click **Client events** and click **Save**.
* Repeat to add webhooks for other event types if needed.

### Run webhooks with Pusher and ngrok

Pusher sends different request body contents depending on the event.
To trigger a call: in the [Pusher dashboard](https://dashboard.pusher.com/), go to **Debug console**, expand **Event creator**, enter `my-channel` in **Channel**, `my-event` in **Event**, and some text in **Data**, then click **Send event**.

Confirm your localhost app receives the event and logs both headers and body in the terminal.

You can check **Error Logs** and the **Webhook errors** tab for delivery issues (Pusher shows only messages that could not be delivered).

### Inspecting requests

ngrok's [Traffic Inspector](https://dashboard.ngrok.com/traffic-inspector) captures all requests made through your ngrok endpoint to your localhost app.
Select any request to view detailed information about both the request and response.

<Info>
  To avoid exposing secrets, accounts only collect traffic metadata by default.
  You must enable full capture in the **Traffic Inspector** section of [your account settings](https://dashboard.ngrok.com/settings) to capture complete request and response data.
</Info>

Use the traffic inspector to:

* Validate webhook payloads and response data
* Debug request headers, methods, and status codes
* Troubleshoot integration issues without adding logging to your app

### Replaying requests

Test your webhook handling code without triggering new events from your service using the Traffic Inspector's replay feature:

1. Send a test webhook from your service to generate traffic in your Traffic Inspector.

2. Select the request you want to replay in the traffic inspector.

3. Choose your replay option:
   * Click **Replay** to send the exact same request again
   * Select **Replay with modifications** to edit the request before sending

4. (Optional) Modify the request: Edit any part of the original request, such as changing field values in the request body.

5. Send the request by clicking **Replay**.

Your local application will receive the replayed request and log the data to the terminal.

## Secure webhook requests

ngrok can verify that incoming requests are from your Pusher webhook so only that traffic reaches your app.

<Note>
  Webhook verification is limited to 500 validations per month on free accounts.
  If you need more, you can upgrade to Hobbyist or Pay-as-you-go.
  See [TPU Pricing](/pricing-limits/traffic-policy-unit-pricing/) for details.
</Note>

To add verification:

* In the [Pusher dashboard](https://dashboard.pusher.com/), open your channel, **Webhooks**, and copy the webhook secret (or the value shown for signing).

* Create a Traffic Policy file named `pusher_policy.yml`.
  Replace `{your webhook secret}` with the value you copied:

  ```yaml theme={null}
  on_http_request:
    - actions:
        - type: verify-webhook
          config:
            provider: pusher
            secret: "{your webhook secret}"
  ```

* Restart ngrok with the policy file:

  ```bash theme={null}
  ngrok http 3000 --traffic-policy-file pusher_policy.yml
  ```

* Send a client event from the Debug console to trigger the webhook.

Your app should receive the request and log it in the terminal.