Corpenza Accounting API
API Documentation
Manage your invoices, expenses and tax reports from your own systems with the Corpenza Accounting API.
1
Getting Started & Authentication
Your first request to the Corpenza Accounting API: getting an API key and Bearer authentication.
2
Package & Pricing
Corpenza API package: monthly base fee + graduated per-invoice usage.
3
Invoices
Issue invoices via API (automatic VAT/OSS rate), list, detail and cancel.
4
Expenses
Create expenses via API: Estonian chart of accounts (Scheme 1) support, automatic net/VAT.
5
Reports (KMD/VD/OSS, Income Statement)
e-MTA declarations (KMD, VD, OSS) as XML/PDF and Scheme 1 income statement — via API.
6
Company Profile & VAT Suggestion
Read your company's VAT/OSS registration; query the applicable VAT rate before issuing.
7
Error Codes & Limits
HTTP error codes, VAT_NOT_REGISTERED, rate limiting and IP allowlist behaviour.