Documentation

Two ways to reach the books programmatically. Pick MCP to connect an AI assistant, REST to build an integration.

MCP server

Connect Claude, ChatGPT or Cursor straight to the books. The assistant calls the tools for the user — you write no code.

A classic HTTP API with an OpenAPI spec. For custom integrations, system links and batch jobs.

MCP: You want an AI assistant to answer questions about the books, post receipts or reconcile accounts for the user. No code — just one config line in the client.
REST: You are building something deterministic: a sync with a POS system, a nightly job, your own app. You want exact control over every call.
Both: The common case. They sit on the same data and the same permission model — the MCP tools are essentially an AI-friendly shell around the same business logic as the REST API.