> ## Documentation Index
> Fetch the complete documentation index at: https://docs.techfootintl.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Billspree – modular customer billing engine designed for recurring, usage-based, and installment-driven models.

## Welcome to Billspree

Billspree is a customer billing engine designed for recurring, usage-based, and installment-driven models.\
\
It is built with a modular architecture that integrates cleanly with your operational systems and payment providers.

## Core Features

Experience the power of a unified billing infrastructure.

<Columns cols={2}>
  <Card icon="calculator" href="/billing/pricing-module" title="Flexible Billing Models">
    Flat rate, tiered, volume-based, and usage-based billing tailored to your business.
  </Card>

  <Card icon="users" href="/billing/customer" title="Customer Management">
    Streamline onboarding and manage customer profiles and billing cycles.
  </Card>

  <Card icon="file-invoice-dollar" href="/billing/invoice" title="Automated Invoicing">
    Professional, automated, and brand-aligned invoices generated for every transaction.
  </Card>

  <Card icon="terminal" href="/api-reference/introduction" title="Developer First API">
    Integrate Billspree seamlessly into your existing tech stack with our robust API.
  </Card>
</Columns>

## Resources

<Columns cols={2}>
  <Card icon="book" href="https://mintlify.com/docs" title="Documentation">
    Learn how to customize your documentation.
  </Card>

  <Card icon="headset" href="mailto:support@billspree.com" title="Support">
    Need help? Our team is here to support you.
  </Card>
</Columns>