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Create invoices via API, connect your systems
Shop, CRM, or your own backend create invoices directly in Billutant. Bank, payment provider, and mailbox are already built in as connections.
REST API
The API lets you create and fetch invoices, customers, and items, and send invoices by mail. Authentication uses a bearer token that is created in the settings and can be revoked at any time.
Endpoints for invoices, customers, items, and mail templates
Send invoices by mail directly from the API
Full documentation at /api
Sandbox for development
The test environment at test.billutant.com behaves like the live system but is fully separate from it. All data is deleted every month.
Separate API host for test and live
Create and discard as many test invoices as you like
Automatic cleanup every month
Built-in connections
For the most common data sources no API is needed: bank accounts are synced via open banking, customer payments run through Mollie, and incoming invoices arrive directly from the connected mailbox.
Open banking sync for bank transactions
Mollie for cards, Apple Pay, and eps
Mailbox connection for invoice delivery and incoming invoices
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