Billy API

billy.dk · checked 5 Oct 2026

#6 · Accounting APIs

Visit billy.dk ↗ Alternatives Billy API vs FreshBooks

How it plugs in

YesPublic API

NoOpen source

YesFree tier

Signal on Accounting APIs6.3#6 of 27

Pricing

Freekr./md., ekskl. moms · 3 fakturaer · 10 udgiftsbilag · Ubegrænset omsætningFree
Basickr./md., ekskl. moms · Ingen forbrugsgrænser · Revisoradgang · Mail- og chatsupport160 DKK/mo
Pluskr./md., ekskl. moms · Ubegrænsede integrationer · AI-regnskabsfunktioner · Copilot · Support via mail, chat og telefon295 DKK/mo
Completekr./md., ekskl. moms · Kvartalsvist regnskabstjek · Prioriteret support · Gør-det-selv årsregnskab inkluderet595 DKK/mo

As billy.dk lists them, checked 5 Oct 2026.

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Runs on

Web
Windows
Mac
Linux
iOS
Android

Facts

Website: billy.dk
Price: Free tier · from 160 DKK/mo
Free trial: Yes
API capabilities: The API supports getting, listing, creating, updating, and deleting resources such as invoices.
API contact: The API page directs questions and feedback to [email protected].
API format: Billy API v2 is a JSON-based REST API, and Billy's web app uses the same API.
API key creation: Users can create as many API keys as they want to connect Billy with other software, such as a webshop or cash register.
API languages: The API documentation includes code examples for PHP, Node.js 8+, and Python 3.
API operations: The API supports getting, listing, creating, updating, and deleting resources, including invoices.
API paging: List results can be paged, and pageSize cannot exceed 1,000.
Authentication: The documentation describes company access tokens and HTTP Basic Auth; access tokens are permanent and do not expire.
Backup and storage: Billy says it stores accounting data online and backs it up every day.
Company status: Billy's API page says Billy is now part of Shine.
Compliance: Billy says it is certified and approved by the Danish Business Authority for digital bookkeeping.
Endpoint and transport: The API endpoint is https://api.billysbilling.com/v2, and all requests must use SSL.

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