PayPal
Invoice checkout links, customer payment events, and webhook status synchronization.
Integrations
Connect every part of the billing stack.
Invoicycle connects payments, data, authentication, AI, email, deployment, and monitoring while keeping the product package free.
Invoicycle workspace
Billing health
Recurring invoices128 active
Outstanding$42,900
Avg collection time5.2 days
Portal payments91% online
Supported stack
Production-ready services for a v1 SaaS launch.
VPS PostgreSQL
Account invoice records, client records, settings, and portal token validation.
Gemini
AI invoice fill, reminder drafting, anomaly summaries, and billing assistant workflows.
Resend
Invoice sent, reminder, receipt, welcome, and password reset email delivery.
VPS Node server
Production deployment, environment variables, and scheduled recurring invoice cron jobs.
Posthog and Sentry
Product analytics, funnel tracking, runtime errors, and production monitoring.
Webhook first
Payment events update the billing record.
Payment webhooks keep invoice state synchronized with successful invoice payments.
PayPal payment events mark invoices paid
fallback mock links keep local development smooth
signed webhook secrets protect inbound payment events
Payment event
PayPal webhook
Auth event
Local session
Email event
Resend delivery
Security
Signed secrets
Need another integration?
The architecture is ready for Xero, analytics, CRM, and future payment extensions as the product grows.