Sparro API docs
The Sparro API gives your app access to a company's invoices, customers, shifts and mileage once the company's owner has approved your app. Partner apps can also create shifts, register hours and register mileage for the company's employees. Nothing else is written, and there is no access to bookkeeping, payroll, payments or filings.
Get started
Quickstart is the short version. Connect walks through the whole partner guide: send a company to Connect, get a token, read, write with an idempotency key, and verify a webhook. Authentication covers the OAuth2 authorization-code flow in full, including PKCE.
Reference
Scopes lists every permission an app can request. Webhooks, Idempotency, Versioning, Rate limits, Errors and Pagination cover the mechanics every endpoint shares. Each endpoint also has its own reference page, linked from the sidebar, with a copy-pasteable curl sample.
Tools
Postman & OpenAPI has a downloadable collection and the raw spec. See the changelog for what's changed.