Sample ASP.NET Web API Payments in Outlook webhook

This is an example implementation of the payment request and payment complete webhooks for a Payments in Outlook service.


Prior to running this sample, you must register in the Payments in Outlook dashboard and you must have a Stripe connect platform account.

You must also have Visual Studio 2017 installed.

Configuring the sample

  1. Make a copy of the OutlookPayments/MerchantInfo.EXAMPLE.config file in the OutlookPayments directory. Rename this copy of the file to MerchantInfo.config.
  2. Open OutlookPayments.sln in Visual Studio.
  3. Open the MerchantInfo.config file and update the value of the MerchantId key with your merchant ID from the Payments in Outlook dashboard.

Running the sample

Press F5 or select Start Debugging from the Debug menu in Visual Studio.

Using ngrok to run locally

When you run the sample locally, it is accessible via http://localhost:52663. The Payment service must be able to contact your webhook from the internet, so running on localhost won't work. However, by using ngrok, we can create a publicly accessible address that is temporarily able to contact localhost.

Open a command prompt or shell and run the following command:

ngrok http 52663 -host-header=localhost:52663

The output should look similar to this:

ngrok by @inconshreveable                                     (Ctrl+C to quit)

Session Status                online
Account                       Jason Johnston (Plan: Free)
Version                       2.2.8
Region                        United States (us)
Web Interface       
Forwarding           -> localhost:52663
Forwarding           -> localhost:52663

Copy the HTTPS URL from the second Forwarding entry. In the above output, the URL to copy is Using that URL as the base, let's construct two URLs: one to the payment request webhook (ngrok URL + /api/invoices), and one to the payment complete webhook (ngrok URL + /api/payments). For example, using the URL from the example output above:


Leave ngrok running so those URLs remain active.

Update your webhook URLs in the partner dashboard with these URLs for testing.

A screenshot of the webhook URLs in the Payments in Outlook dashboard

Generating a test payment request message

See Get started with Payments in Outlook for steps to send a test message to yourself.


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