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Interfaces to what you already use.

DATEV for your tax firm, ELSTER for the tax office, finAPI for your bank, Mollie for payments and, optionally, an AI with your own key. No hidden dependencies.

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AI chat in ZepDesk with a question about the VAT payment due

The key interfaces

DATEV export

Posting batches and master data in the DATEV format, per client and period, so your tax firm can carry on without rework.

ELSTER

Submission of the UStVA (advance VAT return), permanent filing extension, EC Sales List, corporate income tax (KSt), trade tax (GewSt) and E-Bilanz with your certificate.

finAPI

Bank connection under PSD2 for the vast majority of German banks, or import as MT940 or CSV.

Mollie

Payments by SEPA direct debit, credit card, PayPal and Klarna for your ZepDesk subscription.

E-invoicing network

XRechnung and ZUGFeRD to the EU standard CEN 16931 for sending and receiving.

REST API and webhooks

Your own connections to a shop, point of sale or time tracking, with keys and permissions per application.

Partners and formats

AI with your own key, or not at all

If you want AI support, you store your own API key from Anthropic or OpenAI. Without a key the feature stays off and no data flows. We do not resell tokens.

Bring your own key You choose the provider, model and cost.

On request only Context is passed per question, not mirrored permanently.

Can be switched off per company and per role.

AI chat in ZepDesk, a question about the amount payable in the first quarter

Where ZepDesk can connect.

Four ways out, all without extra software on your computer.

STEP 1

Bank

Account retrieval via finAPI under PSD2, or import as MT940 and CSV.

STEP 2

Tax office

UStVA, EC Sales List and E-Bilanz via ELSTER with your certificate.

STEP 3

Tax firm

DATEV export of posting batches per client and period.

STEP 4

Your own systems

REST API with keys and permissions, reference via Scalar.

Subscription payments run through Mollie: SEPA, card, PayPal, Klarna.

Try out the interfaces.

Create an account, test the DATEV export, connect your bank. All at no extra cost.

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