Swagger

Welcome to the Billit API! This guide helps you begin using the API via the Swagger UI at https://api.billit.be/swagger/ui/index.

1. What is the Billit API

The Billit API allows you to programmatically interact with Billit’s services — such as invoices, clients, quotes, and payments. It is built around REST endpoints and supports standard CRUD operations (Create, Read, Update, Delete).

2. Accessing Swagger UI

Go to https://api.billit.be/swagger/ui/index
Browse all available endpoints, methods, parameters, and schemas
Use the interactive interface to test endpoints with “Explore”

3. Authentication

Most endpoints require authentication.

Use the API KEY in Swagger UI to input your credentials

4. Common API Endpoints

While the full list is in Swagger, here are examples:

Resource	How can it help you?
Account	Retrieve the context of the Account (company) context you are operating in You can use this API if you want to: Set the license Register a new Account Get the current SSO token
Invoices
Clients	List, Create, Update, Delete
Quotes	List, Create, Update, Delete
Payments	Report, Acknowledge, etc.