Integrations and API
Connect the systems you already use.
Send invoices from your billing system or website, connect automation tools such as Make, and let AI assistants read the books with your permission, all through one documented API.
14 days free. No card required.
- Billing system, through MakeActive
- Website shop, API keyActive
- AI assistantRead only
- Invoices received today37
Sample connections.
A documented REST API
Create customers, invoices, bills and more. The API is documented, and keys are limited to exactly the access you give them.
Invoices from your billing system
Send each sale from your billing system or online shop. The invoice can be marked paid in the same call, ready for bank reconciliation.
Automation tools
Use Make or a similar tool to connect DecaBooks to hundreds of apps without writing code.
AI assistants
Connect an AI assistant such as Claude, so it can read the books and prepare work, with your permission.
Safe by design
Each key or connection has its own permissions, and you can withdraw access at any time.
Questions
Is the API included in every plan?
Yes.
Do you have a Make blueprint?
Yes. We can share a ready-made Make scenario for sending invoices from a billing system.
Can I connect a bank feed?
Not yet. Upload bank statements as PDF or CSV and the AI reads them.
Where are the API docs?
Inside DecaBooks under Settings, once you have an account.
See it on your own books.
Start a free 14-day trial, or book a demo and we will set it up with you.