Intermediatepaymentemailautomation

SaaS Billing PipelineAI Workflow

End-to-end subscription billing: manage recurring payments, generate PDF invoices, render branded email templates, and send them automatically. Event-driven — invoice is generated and emailed on every successful payment.

Prerequisites

Environment variables

STRIPE_SKSTRIPE_WEBHOOK_SECRETRESEND_KEY

Stripe webhook endpoint must be configured in the Stripe dashboard to forward `invoice.paid` events.

Install

$npx radzor@latest recipe add saas-billing

AI Prompt

“Run `npx radzor@latest add subscription-billing invoice-generator email-template email-send` to install 4 Radzor components. Then read components/radzor/subscription-billing/radzor.manifest.json, components/radzor/invoice-generator/radzor.manifest.json, components/radzor/email-template/radzor.manifest.json, components/radzor/email-send/radzor.manifest.json and each component's llm/integration.md. Wire them together to end-to-end subscription billing: manage recurring payments, generate PDF invoices, render branded email templates, and send them automatically. Event-driven — invoice is generated and emailed on every successful payment. Use the manifest's inputs (check envVar for required environment variables), outputs (check fields for object shapes), composability (check mapField for field extraction), and actions — don't invent custom interfaces.”

Paste this into Claude Code, Cursor, Windsurf, or any AI coding agent.

Pipeline

SubscriptionBilling

Manages recurring subscriptions via Stripe

→

↓

payment event

InvoiceGenerator

Generates a PDF invoice from the payment data

→

↓

PDF + invoice data

EmailTemplate

Renders a branded invoice email

→

↓

HTML email

EmailSend

Sends the invoice to the customer

Scaffolded Code

saas-billing-recipe.ts

// npx radzor@latest add subscription-billing invoice-generator email-template email-send
import { SubscriptionBilling } from "./components/radzor/subscription-billing"
import { InvoiceGenerator }    from "./components/radzor/invoice-generator"
import { EmailTemplate }       from "./components/radzor/email-template"
import { EmailSend }           from "./components/radzor/email-send"

const billing = new SubscriptionBilling({
  secretKey: process.env.STRIPE_SK!,
  webhookSecret: process.env.STRIPE_WEBHOOK_SECRET!,
})
const invoicer = new InvoiceGenerator({ companyName: "Acme Inc.", currency: "usd", taxRate: 0.2 })
const templates = new EmailTemplate({})
const mailer = new EmailSend({ provider: "resend", apiKey: process.env.RESEND_KEY!, from: "billing@acme.com" })

// Register the invoice email template
templates.registerTemplate("invoice", `
<h1>Invoice {{invoiceNumber}}</h1>
<p>Hi {{customerName}},</p>
<p>Your payment of <strong>${{total}}</strong> has been received.</p>
<p>Please find your invoice attached.</p>
`)

// React to successful payments
billing.on("onSubscriptionCreated", async (event) => {
  // Generate PDF invoice
  invoicer.setCustomer(event.customerId, event.customerId)
  invoicer.addLineItem("Subscription", 1, 29.99)
  const { pdf, data } = await invoicer.generate()

  // Render email from template
  const { html } = await templates.render("invoice", {
    invoiceNumber: data.invoiceNumber,
    customerName: event.customerId,
    total: data.total.toString(),
  })

  // Send the email
  await mailer.send({ to: event.customerId, subject: `Invoice ${data.invoiceNumber}`, html })
})

// Create a subscription
await billing.createSubscription("cus_xxx", "price_monthly")

Components used

SubscriptionBillingManages recurring subscriptions via Stripe

View

InvoiceGeneratorGenerates a PDF invoice from the payment data

View

EmailTemplateRenders a branded invoice email

View

EmailSendSends the invoice to the customer

View

LLM tip

Pass all 4 radzor.manifest.json files to your agent at once. It will read the outputs of each step and match them against the inputs of the next — wiring the full pipeline without any extra instructions.

subscription-billing/manifest.json invoice-generator/manifest.json email-template/manifest.json email-send/manifest.json

// npx radzor@latest add subscription-billing invoice-generator email-template email-send import { SubscriptionBilling } from "./components/radzor/subscription-billing" import { InvoiceGenerator } from "./components/radzor/invoice-generator" import { EmailTemplate } from "./components/radzor/email-template" import { EmailSend } from "./components/radzor/email-send" const billing = new SubscriptionBilling({ secretKey: process.env.STRIPE_SK!, webhookSecret: process.env.STRIPE_WEBHOOK_SECRET!, }) const invoicer = new InvoiceGenerator({ companyName: "Acme Inc.", currency: "usd", taxRate: 0.2 }) const templates = new EmailTemplate({}) const mailer = new EmailSend({ provider: "resend", apiKey: process.env.RESEND_KEY!, from: "billing@acme.com" }) // Register the invoice email template templates.registerTemplate("invoice", ` <h1>Invoice {{invoiceNumber}}</h1> <p>Hi {{customerName}},</p> <p>Your payment of <strong>${{total}}</strong> has been received.</p> <p>Please find your invoice attached.</p> `) // React to successful payments billing.on("onSubscriptionCreated", async (event) => { // Generate PDF invoice invoicer.setCustomer(event.customerId, event.customerId) invoicer.addLineItem("Subscription", 1, 29.99) const { pdf, data } = await invoicer.generate() // Render email from template const { html } = await templates.render("invoice", { invoiceNumber: data.invoiceNumber, customerName: event.customerId, total: data.total.toString(), }) // Send the email await mailer.send({ to: event.customerId, subject: `Invoice ${data.invoiceNumber}`, html }) }) // Create a subscription await billing.createSubscription("cus_xxx", "price_monthly")