For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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  • Get started
    • Lucanto API
    • Quickstart
    • Authentication
    • Pagination
    • Idempotency
    • Errors
    • MCP server
  • Changelog
    • Changelog
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  • Base URL
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Lucanto API

Programmatic access to invoices, expenses, contacts, and your workspace data
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Quickstart

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The Lucanto API lets you integrate invoicing into your e-shop, accounting software, CRM, or custom automation. Everything you can do in the Lucanto app, you can do over a clean REST API — or hand to an AI agent over MCP.

Quickstart

Create an API key and make your first call in under five minutes.

Authentication

Personal access tokens vs. workspace tokens, and how scopes work.

Pagination

Cursor-based pagination on every list endpoint.

Idempotency

Safe retries on POST with the Idempotency-Key header.

Errors

The canonical error envelope and how to handle it.

MCP server

Connect Claude, Cursor, or ChatGPT to your Lucanto workspace.

Base URL

All endpoints are served from:

https://app.lucanto.eu/api/v1

Every resource is scoped to a workspace via the account_id path segment, e.g. GET /api/v1/accounts/{account_id}/invoices.