Open Payment Host

Sell Subscriptions, Newsletters, Digital Files without paying commissions.

What

Open Payment Host is an easy to run self-hosted, minimalist payments host through which we can easily sell our digital items without paying double commissions while having total control over our sales and data.

Why

Selling digital items on web as an indie requires using platforms where we have to pay double commissions(to the platform and the payment gateway) and our content is forever locked within those platforms.

Who

• Those who are looking to self-host an alternative for Gumroad, Buy Me a Coffee, Ko-fi etc.

• Those who churn out lot of projects and don't want to integrate payment gateway every time.

• Those who want to use multiple payment gateways for different countries e.g. for parity pricing or for redundancy.

How

Open Payment Host is a minimalist yet highly performant Go web application with innovative features which helps indies self-host and sell digital items with little effort.

One Click Deployment

Features

• WYSIWYG editor to create beautiful product pages.
• One Time and Subscription payments support.
• Stripe support, Just add the price id for the product and rest is done automatically.
• Paypal support, Just add the plan id for the product and rest is done automatically ^new.
• Razorpay support, Just add the plan id for the product and rest is done automatically ^new.
• Square support, Just add the amount for the product and rest is done automatically.
• Customers can buy without logging in, Increases conversion.
• Multi-country pricing, Price changes automatically according to the user's location resulting in better conversion.
• Light and Dark theme.
• Mailchimp support, Customers are automatically added to a mailchimp list; Useful for sending newsletters.
• File attachment support(images) for the product posts.
• S3 support for delivering digital files via automatic pre-signed URL.
• Subscriber count for the products.
• Automatic SSL and other security features for production.
• Automatic payment gateway router based on country^new
• API & Webhook ^experimental.

Production Demo

https://payments.abishekmuthian.com

WIP

This is a work in progress project, although I put lot of effort in ensuring security and stability of the platform users should be aware of possible unknown bugs. That said, I use Open Payment Host as payments host for my own projects.

Immediate Goals

• Product pages
• Stripe integration
• Square integration
• Paypal integration
• Razorpay integration
• Payment router
• File download
• Documentation website
• Accessibility

Long Term Goals

• Paddle integration
• PayU integration
• Cashfree integration
• Direct banking API integration
• Community features
• Localisation

If you would like to help me achieve these goals, consider sponsoring me

Screenshots

Home

WYSIWYG editor

Buy without login

Square

No credit card data is stored locally

Stripe

Square

Strong customer authentication (3D-Secure, SCA) support

File delivery after payment

Stripe

Square

Automatic payment gateway router

Paypal

paypal.mp4

Razorpay

razorpay.mp4

Usage

Requirements

1. Stripe or Square or Paypal or Razorpay account for payment gateway.

2. Cloudflare account for turnstile captcha.

3. Mailchimp account for adding subscribers to the list.

Note: Open Payment Host can be tested without fulfilling above requirements, But payments and adding subscribers to the list wouldn't work.

Docker

The latest image is available on DockerHub at abishekmuthian/open-payment-host:latest.

Demo Setup

mkdir oph-demo && cd oph-demo
sh -c "$(curl -fsSL https://raw.githubusercontent.com/abishekmuthian/open-payment-host/main/samples/oph-demo/install-demo.sh)"

Visit http://localhost:3000.

Demo version prints more detailed level of errors if any, DO NOT use this demo setup in production.

Login

The default admin email id is [email protected] and the password is OpenPaymentHost. You'll be asked to reset the password after login for security reasons. That password is hashed and stored.

You'll be logged out after changing password automatically to login with the new credentials.

Admin email id and default admin password can be changed in the config file (explained below) after the first run. Each time the password is reset in the config file, The password needs to be changed again once logged in for security.

Production Setup

It's recommended to try the demo application first before using the production application. The production application requires a registered domain and special config variables for SSL as detailed in the configuration section.

mkdir oph-production && cd oph-production
sh -c "$(curl -fsSL https://raw.githubusercontent.com/abishekmuthian/open-payment-host/main/samples/oph-production/install-production.sh)"

After the container has started successfully, Stop the container, Set the required production configuration and re-run the container.

Configuration

Config file fragmenta.json is located in the secrets folder. It is generated automatically during the first run, After editing the config file the application needs to be restarted for the new configuration to take effect.

fragmenta.json contains configuration for both development and production. The production configuration is loaded when the environment variable FRAG_ENV=production is set.

Note: Environment variable for production is set automatically when using the docker production setup.

User configurable values are included in the table below.

Key	Description	Value
admin_email	Email id of the administrator.	Default: [email protected]
admin_default_password	Default password of the administrator, Would be forced to changed after login.	Default: OpenPaymentHost
reset_admin	Reset the email and password of the admin during the next run.	yes (or) no
domain	Website domain name for the application.	Dev: localhost, Prod: example
port	Port of the application.	Dev: 3000, Prod: 443 (SSL)
root_url	FQDN for the application with protocol and port.	Dev: http://localhost:3000, Prod: https://example.com
autocert_domains	Comma separated domains for SSL certificates.	Demo: NA, Prod: www.example.com, example.com
autocert_email	email id for SSL certificate related notifications.	Demo: NA, Prod: [email protected]
autocert_ssl	Enable or Disable automatic ssl	Demo: NA, Prod: yes/no
name	Name of the website.	Default: Open Payment Host
meta_title	Title of the website.	Default : Sell what you want without paying commissions
meta_desc	Description of the website.	Default: Sell Subscriptions, Newsletters, Digital Files without paying commissions.
meta_keywords	Keywords for the website.	Default: payments,subscription,projects,products
meta_image	URL for the featured image for the website.	Default: /assets/images/app/oph_featured_image.png
meta_url	Meta URL for the page when its not generated automatically.	Dev: http://localhost:3000, Prod: https://example.com
square	Enable the square payment gateway, When enabled all other square credentials are mandatory.	Dev/Prod : yes,no
square_access_token	Square access token for accessing your square account.	Dev: Sandbox access token, Prod: Production access token
square_app_id	Square app id to identify your application.	Dev: sandbox-..., Production: production app id
square_location_id	Square location id for the account	Dev: Sandbox location id from test account, Prod: location id from the main account
square_notification_url	Square notification url for the webhook.	Dev:Sandbox webhook URL, Prod: Production webhook URL
square_signature_key	Square signature for webhook authentication	Dev: Sandbox webhook signature, Prod: Production webhook signature
square_sandbox_source_id	Square sandbox source id for credit card	Dev: cnon:card-nonce-ok, Prod:""
square_domain	Square API domain	Dev: https://connect.squareupsandbox.com/v2, Prod: https://connect.squareup.com/v2
s3_access_key	S3 compatible access key	Dev: NA,Prod: NA
s3_secret_key	S3 compatible secret key	Dev: NA, Prod: NA
stripe	Enable the stripe payment gateway, When enabled all other stripe credentials are mandatory.	Dev/Prod : yes, no
stripe_key	Stripe developer key.	Dev: pktest..., Prod: pklive...****
stripe_secret	Stripe developer secret key.	Dev: sktest..., Prod: sklive...
stripe_webhook_secret	Stripe webhook signing secret	Dev: whsec_xxx, Prod: whsec_xxx
stripe_tax_rate_[ISO 3166-1 alpha-2]	Stripe tax id for a country represented by [ ISO 3166-1 alpha-2] code eg. stripe_tax_rate_US	Dev: txr*..., Prod: txr*...
stripe_callback_domain	Root URL for callback after Stripe event.	Dev: [Use tunnel like ngrok], Prod: [Use root_url]
subscription_client_country	Test country for testing multi-country pricing.	Dev: US, IN, FR etc. Prod: NA
mailchimp_token	Mailchimp API Key.	e.g. ...-us12
turnstile_secret_key	Cloudflare turnstile secret key for captcha.	Dev: 1x00000000000000000000AA, Prod: 0x...
turnstile_site_key	Cloudflare turnstile key for captcha.	Dev: 1x0000000000000000000000000000000AA, Prod: 0x...
paypal	Enable the paypal payment gateway, When enabled all other paypal credentials are mandatory.	Dev/Prod : yes,no
paypal_domain	sandbox or production domain domain	Dev: https://www.sandbox.paypal.com , Prod: https://www.paypal.com
paypal_api_domain	sandbox or production API domain	Dev: https://api-m.sandbox.paypal.com , Prod: https://api-m.paypal.com
paypal_client_id	Paypal client ID	Dev: XXX, Prod: XXX
paypal_client_secret	Paypal client secret	Dev: XXX, Prod: XXX
paypal_webhook_id	Paypal webhook ID	Dev: XXX, Prod: XXX
razorpay	Enable the razorpay payment gateway, when enabled all other razorpay credentials are mandatory.	Dev/Prod: yes
razorpay_key_secret	Razorpay key secret	Dev: XXX, Prod: XXX
razorpay_webhook_secret	Razorpay webhook secret	Dev: XXX, Prod: XXX

Stripe Webhook Setup

Webhook needs to be setup at Stripe Developer's section for receiving subscription details post payment.

Set the webhook to root_url/subscriptions/stripe-webhook where the root_url is defined in the configuration above. To test the webhooks in the local environment, Use a tunnel like ngrok.

Set the following events to send:

1. checkout.session.completed
2. payment_method.attached
3. invoice.paid
4. invoice.payment_failed
5. customer.subscription.deleted

Square Webhook Setup

Webhook needs to be setup at Square Developer's section for receiving subscription details post payment.

Set the webhook to root_url/subscriptions/square-webhook where the root_url is defined in the configuration above. To test the webhooks in the local environment, Use a tunnel like ngrok.

Set the following events to send:

1. subscription.created
2. subscription.updated

Paypal Webhook Setup

Webhook needs to be setup at Paypal Developer's section for receiving subscription details post payment.

Set the webhook to root_url/subscriptions/paypal-webhook where the root_url is defined in the configuration above. To test the webhooks in the local environment, Use a tunnel like ngrok.

Set the following events to send:

1. CHECKOUT.ORDER.APPROVED
2. CAPTURE.REFUNDED
3. BILLING.SUBSCRIPTION.ACTIVATED
4. BILLING.SUBSCRIPTION.CREATED
5. BILLING.SUBSCRIPTION.UPDATED
6. BILLING.SUBSCRIPTION.EXPIRED
7. BILLING.SUBSCRIPTION.CANCELLED
8. BILLING.SUBSCRIPTION.SUSPENDED
9. BILLING.SUBSCRIPTION.PAYMENT.FAILED

Razorpay Webhook Setup

Webhook needs to be setup at Razorpay Developer's section for receiving subscription details post payment.

Set the webhook to root_url/subscriptions/razorpay-webhook where the root_url is defined in the configuration above. To test the webhooks in the local environment, Use a tunnel like ngrok.

Set the following events to send:

1. order.paid
2. subscription.authenticated
3. subscription.paused
4. subscription.resumed
5. subscription.activated
6. subscription.pending
7. subscription.halted
8. subscription.charged
9. subscription.cancelled
10. subscription.completed
11. subscription.updated

API and Webhook ^Experimental

You can call Open Payment Host for just payments from another website. Once payment is completed the user is redirected back to your website and the payment related data is sent to the webhook mentioned in the product page.

Redirect to the OPH product page

https://<your-oph-domain-for-the-product>?custom_id=<custom-id>&redirect_uri=<redirect-uri>

URL Parameters

custom_id : custom id e.g. user id.

redirect_uri : redirect URI e.g. success page.

Webhook Callback Request

Request Header

X-OPH-Signature : Signature generated using SHA-256 with the webhook secret as key given in the product page.

Note: Generate signature for the webhook request body and compare it with the signature in the header to verify that they are from your Open Payment Host.

Request Body

{
    "subscription_id": "xxxx",
    "custom_id": "xxxx",
    "status": "active"
}

Request Parameters

subscription_id : subscription id of the payment. Store it to track the subscription of the user.

custom_id : e.g. user id to identify the user and enable subscription features.

status : active when the subscription is created and cancelled when the subscription is cancelled.

Developer

Build Open Payment Host

To build the application yourself,

$ git clone https://github.com/abishekmuthian/open-payment-host
$ cd open-payment-host
$ go build open-payment-host

There are docker-compose , Dockerfile files in the root of the project to build a docker image.

Tailwind

Open Payment Host uses Tailwind and Daisy UI for its UI.

Compile Tailwind using the following command,

npx @tailwindcss/cli -i ./tailwind/tailwind.css -o ./src/app/assets/styles/app.css --watch

License

Copyright (C) 2025 Abishek Muthian (Open Payment Host)

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License along with this program. If not, see https://www.gnu.org/licenses/.

Licenses for open-source libraries used in this project

Fragmenta: https://github.com/fragmenta licensed under The MIT License.

tailwindcss: https://github.com/tailwindlabs/tailwindcss licensed under The MIT License.

daisyui: https://github.com/saadeghi/daisyui licensed under The MIT License.

trix: https://github.com/basecamp/trix licensed under The MIT License.

htmx: https://github.com/bigskysoftware/htmx licensed under Zero-Clause BSD.

hyperscript: https://github.com/bigskysoftware/_hyperscript licensed under Zero-Clause BSD.