# FinStack Docs

## What is FinStack?

FinStack is an AI-native developer platform for financial services. It provides composable primitives — payments, customers, fraud, receipts, tax, and more — that developers wire together to build fintech products.

Primitive
Description

Payment
Charge, capture, cancel, and refund payments

Customer
Store and manage customer profiles

Fraud
Risk scoring and fraud prevention

Receipt
Generate and deliver payment receipts

Tax
Sales tax calculation

Ledger
Double-entry accounting ledger

## Quick links

- [Quick Start](/quickstart/) — make your first API call in 5 minutes

- [Authentication](/authentication/) — API keys and OAuth

- [Payments guide](/payments/) — charge, capture, cancel, refund