Tutorial - Build an Invoicing App Using the API

[MantisClone]

Problem

Developers who want to build custom invoicing solutions using the Request Network API need a comprehensive tutorial showing how to implement core invoicing functionality from scratch.

Proposed Solution

Create a tutorial covering:

• Setup and API key configuration
• Creating invoices via API
• Processing payments with call data
• Implementing webhook listeners for payment notifications
• Querying invoices for dashboard views
• Optional: conversion payments, batch payments, recurring invoices

Considerations

• Should be framework-agnostic or focus on popular stack (Node.js/Express, Next.js, Python)
• Include working code examples for all core features
• Cover production considerations: error handling, webhook security, custom metadata storage
• Link from "View Invoicing Examples" card on /use-cases/invoicing
• Distinguish from Fork EasyInvoice tutorial (different use case)