> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://rockwell.ferndocs.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://rockwell.ferndocs.com/_mcp/server.

# API Reference

The Plex API reference provides interactive documentation for all available REST APIs. Each endpoint includes request and response schemas, parameter details, and code examples you can use to integrate directly with the Plex platform.

## Available APIs

| API                                                                                 | Description                                                                                                 |
| ----------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------- |
| [**Accounts Payable Payments**](/api-reference/accounts-payable-payments-api)       | Retrieve AP payment records for reconciliation, reporting, and audit purposes                               |
| [**Accounts Receivable Deposits**](/api-reference/accounts-receivable-deposits-api) | Access AR deposit and deposit line data for tracking customer payments                                      |
| [**Accounts Receivable Invoices**](/api-reference/accounts-receivable-invoices-api) | Manage AR invoices including creation, retrieval, and line-item details                                     |
| [**Contacts**](/api-reference/contacts-api)                                         | Create, update, search, and delete contact records associated with customers, suppliers, and other entities |
| [**Customers**](/api-reference/customers-api)                                       | Manage customer master data including addresses, financial details, and lifecycle status                    |
| [**Purchase Orders**](/api-reference/purchase-orders-api)                           | Create and manage purchase orders, line items, and supplier purchasing workflows                            |
| [**Sales Orders**](/api-reference/sales-orders-api)                                 | Create and manage sales orders, line items, and customer order workflows                                    |

## Using the API Explorer

Each endpoint page includes an interactive API Explorer. You can fill in parameters, send requests, and inspect responses directly in the browser — no external tools required.

## Authentication

All API requests require authentication. Include your API key in the request headers when making calls to any Plex endpoint.