E-commerce & Payments Skill
Billing Automation
Build automated billing systems for recurring payments, invoicing, subscription lifecycle, and…
$15
Paypal Integration
Integrate PayPal payment processing with support for express checkout, subscriptions, and…
Paypal Integration gives you a complete, production-ready blueprint for accepting PayPal payments: Smart Payment Buttons, server-side order creation and capture, recurring subscriptions, and refund workflows. It comes with a reusable PayPal client, IPN webhook verification, and the state-machine discipline that keeps every order in a valid lifecycle. The result is a checkout that handles network retries, duplicate notifications, and disputes without leaking money or breaking trust.
$15 one-time
Add to a kit → Prices include 20% VAT. · Forged on real agency work · one-time, no lock-in
- Type Skill
- Category E-commerce & Payments
- Delivery Email · instant
- License One-time
Inside the run · no black box
See the actual work before you buy it.
An unverified PayPal notification never touches the database, and a duplicate IPN never ships the same order twice. Verification and idempotency sit at every hop of this integration.
- Sets up the server-side client: an OAuth client-credentials token, then order creation with CAPTURE intent through the REST API, never trusting the frontend alone.
- Renders Smart Payment Buttons on the frontend and, after the buyer approves, sends the order ID to the backend where capture and verification happen.
- Verifies every incoming IPN or webhook by posting it back to PayPal; an unverified notification is rejected before any database write.
- Processes notifications idempotently: the transaction ID is checked against processed records, so a duplicate IPN never fulfills the same order twice.
- Models the payment as a state machine (created, approved, captured, refunded), so a refund can only follow a capture and partial refunds can never exceed the original amount.
- Wires subscriptions through billing plans and runs the entire flow in sandbox with test accounts before any live credential is touched.
One power source. 6 lines out.
paypal-integration · core
core active · 6 lines
- ✓ adding paypal as a check…
Adding PayPal as a checkout option
- ✓ express checkout with gu…
Express checkout with guest and account payments
- ✓ setting up recurring sub…
Setting up recurring subscription billing plans
- ✓ processing full and part…
Processing full and partial refunds safely
- ✓ verifying and handling ipn
Verifying and handling IPN webhook notifications
- ✓ supporting international…
Supporting international, multi-currency payments
Yours to keep.
Drag time forward. Watch what stays.
Forever
That's what owning means.
The rented stack
ai writing tool: subscription
expired · access lostanalytics suite: subscription
expired · access lostdesign platform: subscription
expired · access lost(nothing left)
Your forge
-
Ship a payment flow that survives retries and duplicate webhooks intact
license: perpetual -
Prevent double-charges and double-refunds with idempotency keys
license: perpetual -
Catch chargebacks and reversals before they corrupt order state
license: perpetual -
Test confidently in sandbox before touching real money
license: perpetual
subscriptions expire · deeds don't
Everything in the box.
Pick a piece up. Watch it work.
Smart Payment Buttons frontend with server capture handoff
6 parts · one working system · ships instantly by email
This wasn't forged for everyone.
- Not for you if you'd rather rent a tool than own one.
- Not for you if you want someone else to run your stack.
- Not for you if you're happy guessing.
Developers building e-commerce or subscription checkout who need PayPal payments that are verified, idempotent, and fail-secure end to end.
then this was forged for you.Works with
Universal by design: these run in any AI. Delivered in the open Agent Skills + MCP format (native in Claude); ChatGPT, Gemini, Cursor and Copilot adapt the same files their own way.
- Claude Native format
- ChatGPT Adapts via open standards
- Gemini Adapts via open standards
- Cursor Adapts via open standards
- Copilot Adapts via open standards
Catch what's on your mind.
the air is clear. nothing between you and the forge.
catch a spark: the forge will answer
-
Can I add this next to an existing Stripe checkout, or does it want to own payments?
It slots in as one payment option: the Smart Payment Buttons frontend and the server-side OAuth/order REST client are self-contained, so PayPal runs alongside whatever processor already handles your cards. Your existing checkout keeps its own flow.
-
How does it actually prevent double charges and double refunds?
Three mechanisms work together: idempotency keys on create and capture calls, an order state machine (CREATED to APPROVED to CAPTURED to REFUNDED) that rejects invalid transitions, and IPN webhook verification that tolerates duplicate notifications. A retry or repeated webhook can't move money twice.
-
Does it handle card payments outside PayPal or fight disputes for me?
No. It's PayPal-only: cards through other processors need their own integration: and while it catches chargebacks and reversals before they corrupt order state, responding to the dispute itself is still a human process in your PayPal account.
-
How is it delivered?
By email right after purchase: ready to run, downloaded instantly, no setup wait.
-
One-time or subscription?
A one-time purchase; no subscription or hidden fees. VAT (20%) is included.
-
Can I get a refund?
As a digital product, it can’t be refunded once downloaded. That’s why we show exactly what’s inside and who it’s for, right here.