Guides

Recipes

Short, task-focused guides for the most common integration scenarios — with copyable code examples, prerequisites, and common pitfalls.

Every call must send a valid API token in the Authorization header — how to create, store and use it.

Put a working integration together from scratch: token, first call, company data, reusable client.

The API answers with a flat `_error` field — how to recognise and handle the 400 / 401 / 403 / 404 / 429 statuses.

Read the supplier invoices (expenses) received by your company, paginated and filtered, from /1/expenses/.

Mirror where an expense stands in QUiCK processing — without webhooks, using incremental polling.