The Numina API and MCP server

Documentation

Build on Numina's double-entry ledger: read accounts and balances, post journal entries, issue invoices, or connect an AI assistant over MCP.

Start here

Quickstart
Create an API key, read a company's chart of accounts and post your first draft journal entry in about five minutes.
Authentication
Authenticate with an API key for your own company, or with OAuth 2.1 and PKCE for an app that other Numina companies connect to.
MCP server
Connect Claude, ChatGPT, Cursor or any MCP client to a company's books. The assistant reads the ledger and writes drafts that a person books.