> ## Documentation Index > Fetch the complete documentation index at: https://docs.chift.eu/llms.txt > Use this file to discover all available pages before exploring further. # Unified APIs Chift exposes one **Unified API** per category of financial software. Each one normalizes the data model across every connector in that category, so you integrate once and work with the same objects whatever software your end-user runs. For how to build with them, see the [Building path](/guides/building-path/overview). Each API below has an **overview**, its **connector coverage**, a **glossary** of its data model, and, where relevant, **guides & behaviours**. Journals, invoices, chart of accounts, partners and more, across all major accounting software. Create, send, and manage invoices across multiple invoicing platforms. Sales, orders, closures, products, and customers across multiple POS systems. Orders, products, customers, and inventory across online shopping platforms and marketplaces. Reservations, orders, invoices, and customers across hospitality platforms. Transactions, balances, payments, and refunds across payment processors. Aggregated accounts and transaction data across multiple banks.