---
title: Accept a payment - Create a PaymentIntent with .NET
slug: accept-a-payment-create-a-paymentintent-with-net
published_at: 2021-04-27 17:15:03 +0000
updated_at: 2023-01-30 22:53:39 +0000
summary: 
description: Accepting a one-time payment with a custom form requires two steps. First, creating a PaymentIntent on the server. Second, confirming the payment intent on the client. It's also recommended that you handle fulfillment for a purchase when receiving a webhook notification of successful payment.   In this video, you'll learn how to create a PaymentIntent on the server using .NET and how to setup a basic Webhook handler. For part two of this series to confirm a PaymentIntent using a variety of payment methods, watch one of the videos in the playlists for front end frameworks:  HTML and JavaScript - https://www.youtube.com/playlist?list=PLy1nL-pvL2M7EUdqARPiayuj5cjGMLCvM React - https://www.youtube.com/playlist?list=PLy1nL-pvL2M6HFApWUDSGA4Y7btyKx7cE iOS - https://www.youtube.com/playlist?list=PLy1nL-pvL2M6yD1D72ceqqrW_1BqyN4It  Android - https://www.youtube.com/playlist?list=PLy1nL-pvL2M4IvDG-DOFKi_UCEgQkHu3n  If you'd like to learn how to create a PaymentIntent on the server in another server side language, consider watching one of these episodes:  Ruby - https://www.youtube.com/watch?v=079khYtqWPo&list=PLy1nL-pvL2M50RmP6ie-gdcSnfOuQCRYk&index=12 Python - https://www.youtube.com/watch?v=Tgjwx-38Dic&list=PLy1nL-pvL2M55YVn0mGoQ5r-39A1-ZypO&index=11 PHP - https://youtu.be/BPfpPGl85tk Node.js - https://www.youtube.com/watch?v=WG4ehXSEpz4&list=PLy1nL-pvL2M5xNIuNapwmABwEy2uifAlY&index=11 Java - https://www.youtube.com/watch?v=-uyXCnPXegE&list=PLy1nL-pvL2M5TnSGVjEHTTMgdnnHi-KPg&index=11 Go - https://www.youtube.com/watch?v=cbsCxLDL4EY&list=PLy1nL-pvL2M5eqpSBR9KL7K0lcnWo0V0a&index=12 .NET - https://www.youtube.com/watch?v=mqEjRgoZWdo&list=PLy1nL-pvL2M4cNNoUtjWevYSci4ubsbhC&index=11  ### Resources  Code: https://github.com/stripe-samples/accept-a-payment/tree/main/custom-payment-flow Documentation: https://stripe.com/docs/payments/payment-intents How intents work: https://stripe.com/docs/payments/intents  Playlist: https://www.youtube.com/playlist?list=PLy1nL-pvL2M5eqpSBR9KL7K0lcnWo0V0a  ### Table of contents  00:00 Overview 01:11 Setup the office hours sample 01:45 Add route to create-payment-intent 02:12 Create a basic PaymentIntent using the API with stripe-go 02:45 Test the endpoint with cURL 03:12 Accept payment method type and currency in request 04:57 Handle errors 05:48 Handle webhook notifications 08:23 Add a config route for fetching publishable keys 09:00 Recap and conclusion  ### Presenter  CJ Avilla, Developer Advocate at Stripe - https://twitter.com/cjav_dev   ### Support  If you have a question, please feel free to reach out to our support team on Discord at https://stripe.com/go/developer-chat.  ### Updates  Sign up to stay updated with developer news: https://go.stripe.global/dev-digest  ### Feedback  If you have any feedback about this or other episodes, let us know: https://forms.gle/VjNqzRhotM2snYo88. #Stripe #Payments
tags: [stripe, payments, Accept a payment - Create a PaymentIntent with .NET, payment, payment intent, paymentintent, create a payment, create a paymentintent, @cjav_dev]
views: 6888
author: CJ Avilla
url: https://www.cjav.dev/videos/accept-a-payment-create-a-paymentintent-with-net
youtube_url: https://www.youtube.com/watch?v=mqEjRgoZWdo
youtube_id: mqEjRgoZWdo
embed_url: https://www.youtube.com/embed/mqEjRgoZWdo
thumbnail_url: https://i.ytimg.com/vi/mqEjRgoZWdo/hqdefault.jpg
type: video
---

# Accept a payment - Create a PaymentIntent with .NET

*Published: April 27, 2021*
*Views: 6888*

## Watch

[Watch on YouTube](https://www.youtube.com/watch?v=mqEjRgoZWdo)

[![Accept a payment - Create a PaymentIntent with .NET](https://i.ytimg.com/vi/mqEjRgoZWdo/hqdefault.jpg)](https://www.youtube.com/watch?v=mqEjRgoZWdo)

## Description

Accepting a one-time payment with a custom form requires two steps. First, creating a PaymentIntent on the server. Second, confirming the payment intent on the client. It's also recommended that you handle fulfillment for a purchase when receiving a webhook notification of successful payment. 

In this video, you'll learn how to create a PaymentIntent on the server using .NET and how to setup a basic Webhook handler. For part two of this series to confirm a PaymentIntent using a variety of payment methods, watch one of the videos in the playlists for front end frameworks:

HTML and JavaScript - https://www.youtube.com/playlist?list=PLy1nL-pvL2M7EUdqARPiayuj5cjGMLCvM
React - https://www.youtube.com/playlist?list=PLy1nL-pvL2M6HFApWUDSGA4Y7btyKx7cE
iOS - https://www.youtube.com/playlist?list=PLy1nL-pvL2M6yD1D72ceqqrW_1BqyN4It 
Android - https://www.youtube.com/playlist?list=PLy1nL-pvL2M4IvDG-DOFKi_UCEgQkHu3n

If you'd like to learn how to create a PaymentIntent on the server in another server side language, consider watching one of these episodes:

Ruby - https://www.youtube.com/watch?v=079khYtqWPo&list=PLy1nL-pvL2M50RmP6ie-gdcSnfOuQCRYk&index=12
Python - https://www.youtube.com/watch?v=Tgjwx-38Dic&list=PLy1nL-pvL2M55YVn0mGoQ5r-39A1-ZypO&index=11
PHP - https://youtu.be/BPfpPGl85tk
Node.js - https://www.youtube.com/watch?v=WG4ehXSEpz4&list=PLy1nL-pvL2M5xNIuNapwmABwEy2uifAlY&index=11
Java - https://www.youtube.com/watch?v=-uyXCnPXegE&list=PLy1nL-pvL2M5TnSGVjEHTTMgdnnHi-KPg&index=11
Go - https://www.youtube.com/watch?v=cbsCxLDL4EY&list=PLy1nL-pvL2M5eqpSBR9KL7K0lcnWo0V0a&index=12
.NET - https://www.youtube.com/watch?v=mqEjRgoZWdo&list=PLy1nL-pvL2M4cNNoUtjWevYSci4ubsbhC&index=11

### Resources

Code: https://github.com/stripe-samples/accept-a-payment/tree/main/custom-payment-flow
Documentation: https://stripe.com/docs/payments/payment-intents
How intents work: https://stripe.com/docs/payments/intents 
Playlist: https://www.youtube.com/playlist?list=PLy1nL-pvL2M5eqpSBR9KL7K0lcnWo0V0a

### Table of contents

00:00 Overview
01:11 Setup the office hours sample
01:45 Add route to create-payment-intent
02:12 Create a basic PaymentIntent using the API with stripe-go
02:45 Test the endpoint with cURL
03:12 Accept payment method type and currency in request
04:57 Handle errors
05:48 Handle webhook notifications
08:23 Add a config route for fetching publishable keys
09:00 Recap and conclusion

### Presenter

CJ Avilla, Developer Advocate at Stripe - https://twitter.com/cjav_dev 

### Support

If you have a question, please feel free to reach out to our support team on Discord at https://stripe.com/go/developer-chat.

### Updates

Sign up to stay updated with developer news: https://go.stripe.global/dev-digest

### Feedback

If you have any feedback about this or other episodes, let us know: https://forms.gle/VjNqzRhotM2snYo88.
#Stripe #Payments

## Transcript

[Music] in this episode we cover the basic server-side implementation for accepting a one-time payment with a custom form if you're interested in a faster integration path using stripe hosted checkout head over to the checkout playlist in the stripe developer channel so the payment flow you'll see today for collecting a one-time payment has two steps first creating the payment intent on the server and second confirming the payment on the client using the client secret for the payment intent in this episode you'll learn how to add an endpoint to your server to create the payment intent so depending on whether you're using vanilla.js or react on the web or stripe ios or stripe android on mobile you can watch videos for those specific front-end implementations that will co that will pair with the code we implement here so rather than start from scratch we're going to jump start our server implementation using the developer office hours based sample so if you want to see how we go from zero to one check out the starter episode linked in the description you might also be interested in an episode about working with the stripe cli it's a handy tool for helping you build and test your stripe integration all right so from the terminal we're going to run stripe samples create developer office hours and we'll give this one an alias of tutorial we can now pick dot net and that'll download and scaffold a bare bones project with a simple client with some html and a server solution for us so in this episode we're going to spend all of our time in the server directory and in future episodes we'll implement those frontends to confirm payment so let's change into the server directory and open up server dot solution all right you'll see that it already contains a root route for rendering basic html using the use web root and passing in the path to the client-side code using an environment variable you notice it also has a skeleton already for the webhook endpoint now at a minimum we need to add one new server endpoint to create a payment intent that will later confirm on the front end let's stick with the same naming convention as the stripe docs and we'll name our route create payment intent this will be a post route as byron convention we're creating a new resource a payment intent so the logic in this route is very simple we'll create a payment intent using the stripe.net client library to make an api request to stripe initially we'll hard code and pass just the minimum required argument so amount and currency this amount value is denoted in the smallest denomination for a given currency so in this case sense we'll initialize an instance of the payment intent service with our client instance and then call create async to make the api call to stripe finally we need to return some json with only the client secret property of that newly created payment intent we'll fire up the server by pushing the play button here in the top left and then jump into a terminal to test with curl this is going to be a post request to localhost 4242 with an empty object in the request body notice the response is well-formed json and includes the client secret for the newly created payment intent so for this demo we actually want the client secret to be camel case rather than snake case in order to match some of our other server implementations and to match the client so in practice it doesn't matter either way and it doesn't matter what you name the property return to the client just as long as we're sending this client secret it should work so we'll need to create a model with newtonsoft json property attributes to override the name of the property to use camelcase we'll name the class create payment intent response let's test again okay that looks great and has a camel cased client secret property returning to our controller code let's talk about this api call for creating a payment intent again so there's more than two dozen optional parameters available for tailoring the payment experience for your customers one of those optional parameters is payment method types which takes a list of string for the payment method options you'd like to allow your customers to pay with now by default this is a list of string with just one entry and that's the word card making this payment intent only confirmable with card payment methods so in practice you could hard code a list of values for all the different payment method types you want to accept here but in this series you're going to learn how to accept a wide variety of payment method types so let's refactor our endpoint to accept some arguments by deserializing the json body we'll create a new class called create payment intent request so that we can use model binding and in this class we'll extract an argument for the payment method type and furthermore some payment method types only work with specific currencies so let's allow the currency to be passed from the client as well we'll wire up the model binding arguments to the controller action and pass those down to the options let's head back to the terminal and update our crow request to pass in the payment method type and the currency in the request body cool that works but if we try to pass aubex debit as our payment method type and we leave usd as the currency notice this fails in this case we get a big failure response with an error message explaining that au bex debit only works with australian dollars if we update our curl request and pass in aud the server responds with a client secret as expected now in the future we'll want to surface these failures in a nice format so that the front end can consistently parse and present those errors to customers so let's wrap the api call and try catch block and if there's a stripe exception thrown we'll respond with a 400 and follow the structure where the response has an error property pointing at an object with a string message this matches the shape returned directly from the stripe api for client-side calls so it'll make implementing error handling logic on the clients just a bit easier to reason about all right so after restarting and attempting to create a payment intent with an invalid combo of payment method type and currency we now see a well-formed error response so most payment method types complete payment asynchronously for some payments complete nearly instantly like cards but for others payments can take a few days or even more to complete due to the asynchronous nature of the way money flows through networks we highly recommend implementing webhooks to automate fulfillment so we have episodes all about how to set up your web hook handler let's update our webhook endpoint to simply print to the server log when payment intent events fire it's quite common to automate things like sending email notifications or updating your database or pulling from inventory printing shipping labels and more as part of your webhook handler also worth noting is that you could use a third-party tool like zapier or ift as a low or no code solution for handling web notifications for now we're going to simply check to see if the event type is one of payment intent doc created and print a simple status update from the terminal we'll test our new webhook logic with the stripe cli using the listen command stripe listen forms a direct connection from stripe to this locally running server so that when events happen on the demo stripe account they're going to be delivered to the development server without needing any tunneling software like ngrok the stripe listen command accepts a url to which events should be forwarded we're going to add this dash l so that we're using latest event or the latest version of the api when generating event objects now if we successfully create a new payment intent see in the server log that the payment intent was created and we can see in the logs for stripe listen that the payment intent event fired all right let's improve our log statement to include the ids of the event and the payment intent and the status of the payment intent when receiving these event types that start with payment intent dot an instance of the payment intent is available on event.data.object and here we're doing some casting so we have the right type of instance we'll restart the server and fire another test to confirm our improved log statement and now we see the id of the event the id of the payment intent and the status of the payment intent note that this payment intent was not created with a specific payment method so its statuses requires payment method we'll assign a new payment method when confirming on the front end again covered in a future episode so as we add support for more payment method types in the future it'll be interesting to see these status messages in the server logs and align those with what the customer sees and with the various states for payment intents so note that depending on which payment method types you plan to support and which automations you're looking to build you likely won't need to handle every single one of these event types so at this point the server is technically ready to add a front end however we'll add one last simple config route for fetching a publishable key so we don't need to hard code that on the front end this simple helper is purely for serving our publishable keys when receiving a get request to slash config this is a best practice when working with mobile clients so that if for some reason you need to roll your api keys the publishable key is not hard-coded into production mobile apps shipped to users that would require that all mobile users install an updated version of the app to get the new key all right so as a quick recap we added a new endpoint to create payment intents the api call to the create the payment intent passes the amount the currency and now the type of payment methods we want to allow and we also added some logging to the webhook handler for debugging and looking to the future when implementing application logic to automate fulfillment and finally we added a quick helper for returning the publishable key so that we don't have to hard code that in the mobile clients next we recommend heading over to one of the playlists that most closely fits your frontend implementation you can use the links in the description or head over to the stripe developers channel and take a look at the playlist thanks for watching and we'll see you in the next one you

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