--- title: Accept a payment - Create a PaymentIntent with Python slug: accept-a-payment-create-a-paymentintent-with-python published_at: 2021-06-16 20:25:14 +0000 updated_at: 2023-01-30 22:53:29 +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 Python 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, create a payment intent, server, python, flask, accept a payment, PaymentIntent, Create a Payment, @cjav_dev] views: 7742 author: CJ Avilla url: https://www.cjav.dev/videos/accept-a-payment-create-a-paymentintent-with-python youtube_url: https://www.youtube.com/watch?v=3s4Dwox7oTQ youtube_id: 3s4Dwox7oTQ embed_url: https://www.youtube.com/embed/3s4Dwox7oTQ thumbnail_url: https://i.ytimg.com/vi/3s4Dwox7oTQ/hqdefault.jpg type: video --- # Accept a payment - Create a PaymentIntent with Python *Published: June 16, 2021* *Views: 7742* ## Watch [Watch on YouTube](https://www.youtube.com/watch?v=3s4Dwox7oTQ) [![Accept a payment - Create a PaymentIntent with Python](https://i.ytimg.com/vi/3s4Dwox7oTQ/hqdefault.jpg)](https://www.youtube.com/watch?v=3s4Dwox7oTQ) ## 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 Python 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 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 developers channel 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 then depending on whether using vanilla js or react on the web or stripe ios or stripe android on mobile you can watch those videos for specific front-end implementations 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 if you want to see how we go from zero to one check out the python flask starter linked in the description you might also be interested in an episode about working with the stripe cli a handy tool for helping you build and test your stripe integration so from the terminal we run stripe samples create developer office hours and we'll give this one an alias of tutorial we can now pick python and that'll download and scaffold a bare bones project with a simple flask server and an html client now in this episode we'll spend all of our time in the server directory and in future episodes we'll go and implement the front ends to confirm payment so let's change into the server directory and open server.pi now you'll see that server.pi already contains a root route for rendering a basic html page and a skeleton 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 so this route will accept post requests as by convention we're creating a new resource a payment intent let's stick with the same naming convention as the stripe docs and name our route create payment intent so the logic of this route is very simple we'll create a payment intent using the stripe python client library to make an api request directly to stripe and initially we'll hard code and pass just the minimum required argument so amount and currency now this amount is denoted in the smallest denomination for a given currency so in this case sense and finally we need to return some json with only the client secret property of that newly created payment intent all right let's jump into another terminal instance so we can activate the virtual environment install dependencies and start the flask server let's also experiment with that endpoint we just created using curl to make a direct request to that endpoint so this is going to be a post request to localhost 4242 with some application json in the request body so for now we're just going to pass an empty json object notice the response is well-formed json and includes the client secret for the newly created payment intent returning to our code let's talk about this api call for creating a payment intent it turns out there are 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 values for the payment method options you'd like to allow your customers to pay with so by default this is set to an array with one element a string with the word card making this payment intent only confirmable with a card payment method so in practice you could hard code a list of string values for all the different payment method types you want to accept here in this series you'll 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 in the request body we're going to extract an argument for the payment method type and furthermore some payment methods only work with specific currencies so let's also allow that to be passed in from the front end cool let's head over to the terminal update our curl request to pass in the payment method type and the currency in the request body cool that works but if we then try to pass a ubex debit as our payment method type and we keep usd as the currency notice this fails because au bex debit only works with australian dollars in this case the server responded with an html page with the development error logs so if we updated our curl request to pass aud the server responds with the client secret as expected so in the future we'll want to surface failures in a nice format so that our front end can consistently parse and present errors to our customers so let's wrap that api call in a try accept block and render an error response with well form json in a failure case let's just return a 400 for stripe errors and 500s otherwise the failure responses follow the structure where the json 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 our error handling logic on the clients just a bit easier to reason about now when attempting to create a payment intent with an invalid combination of payment method type and currency we see a well-formed json error response 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 more to complete so due to the asynchronous nature of the way that money just flows through networks we highly recommend implementing web hooks to automate fulfillment we have an episode all about how to set up your webhook handler so let's update our webhook endpoint to simply print to the server log when the payment intent events fire it's quite common to automate things like email notifications updating your database 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 hook notifications so from the terminal we'll again 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 stripe account they're 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 now if we successfully create a new payment intent let's say with the ideal payment method type and euros we'll 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 created event fired so when receiving event types that start with payment intent dot an instance of the payment intent object is available on event.data.object let's improve our log statement to include the ids of the event and payment intent and the status of the payment intent we'll fire another test to confirm our improved log statement and now we see the ids of the event the idea of the payment intent and the status of the payment intent notice that the payment intent was not created with any specific payment method so its status is requires payment method we'll assign a new payment method when confirming the payment on the front end again covered in a future episode so as we add support for more payment method types it'll be interesting to see these status messages in the server logs and align those with what the customer is experiencing in with the various states for payment intents so note that depending on which payment method types you plan to support and plan to offer and which automations you're planning to build you likely won't need to handle every single one of these event types all right 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 the publishable key so that we don't need to hard code that on the front ends so this simple helper is just purely for serving our publishable key when receiving a get request 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 the production mobile apps shipped to users that it require that all users install the updated version of the app to get the new key as a quick recap we added a new endpoint to create payment intents the api call to create the payment intent passes the amount currency and a type of payment method we want to allow and we also added some logging to the webhook handler for debugging and looking into the future when implementing application logic to automate fulfillment and finally we added a quick helper route for returning the publishable keys so that we don't hard code those in mobile clients next we recommend heading over to one of the playlists that most closely fits your front-end implementation and you can use the links in the description or head over to the stripe developers channel and take a look at those playlists where you can learn all about different payment method types and confirming those on the client thanks for watching and we'll see in the next one --- [Back to all videos](https://www.cjav.dev/videos) --- 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