Billy API

Plans and prices

Every plan, in full

On the record

API access

The API endpoint is https://api.billysbilling.com/v2, and all requests must use SSL.billy.dk · read 4 Oct 2026

API capabilities

The API supports getting, listing, creating, updating, and deleting resources such as invoices.billy.dk · read 5 Oct 2026

API contact

The API page directs questions and feedback to [email protected].billy.dk · read 4 Oct 2026

API format

Billy API v2 is a JSON-based REST API, and Billy's web app uses the same API.billy.dk · read 4 Oct 2026

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.billy.dk · read 5 Oct 2026

API languages

The API documentation includes code examples for PHP, Node.js 8+, and Python 3.billy.dk · read 4 Oct 2026

API operations

The API supports getting, listing, creating, updating, and deleting resources, including invoices.billy.dk · read 4 Oct 2026

API paging

List results can be paged, and pageSize cannot exceed 1,000.billy.dk · read 4 Oct 2026

Authentication

The documentation describes company access tokens and HTTP Basic Auth; access tokens are permanent and do not expire.billy.dk · read 5 Oct 2026

Backup and storage

Billy says it stores accounting data online and backs it up every day.billy.dk · read 5 Oct 2026

Company status

Billy's API page says Billy is now part of Shine.billy.dk · read 4 Oct 2026

Compliance

Billy says it is certified and approved by the Danish Business Authority for digital bookkeeping.billy.dk · read 4 Oct 2026

Endpoint and transport

The API endpoint is https://api.billysbilling.com/v2, and all requests must use SSL.billy.dk · read 5 Oct 2026

Free plan limit

The pricing page lists a limit of 3 invoices and 10 expense receipts for Free, while Basic and higher plans have no usage limits.billy.dk · read 5 Oct 2026

Integrations

Billy’s integration directory includes connections for services such as Shopify, WooCommerce, Salary, MobilePay, and Lunar.billy.dk · read 5 Oct 2026

Intended users

Billy describes its accounting software as helping self-employed people manage bookkeeping, invoices, and VAT.billy.dk · read 5 Oct 2026

Other accounting features

Billy says users can upload receipts from mobile or computer or forward them by email, and that it automatically reads relevant data from uploaded receipts.billy.dk · read 5 Oct 2026

Product purpose

Billy describes its online accounting product as serving self-employed people and providing accounting, bookkeeping, and invoicing functions.billy.dk · read 4 Oct 2026

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